/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 19:33:55,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 19:33:55,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 19:33:55,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 19:33:55,496 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-Delay.epf [2021-08-06 19:33:55,526 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 19:33:55,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 19:33:55,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 19:33:55,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 19:33:55,529 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 19:33:55,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 19:33:55,529 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 19:33:55,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 19:33:55,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 19:33:55,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 19:33:55,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 19:33:55,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 19:33:55,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 19:33:55,531 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 19:33:55,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 19:33:55,531 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 19:33:55,531 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 19:33:55,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 19:33:55,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 19:33:55,531 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 19:33:55,532 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 19:33:55,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:33:55,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 19:33:55,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 19:33:55,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 19:33:55,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 19:33:55,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 19:33:55,532 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 19:33:55,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 19:33:55,532 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 19:33:55,533 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 19:33:55,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 19:33:55,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 19:33:55,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 19:33:55,796 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 19:33:55,796 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 19:33:55,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl [2021-08-06 19:33:55,798 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-2.wvr.bpl' [2021-08-06 19:33:55,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 19:33:55,836 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 19:33:55,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 19:33:55,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 19:33:55,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 19:33:55,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:33:55" (1/1) ... [2021-08-06 19:33:55,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:33:55" (1/1) ... [2021-08-06 19:33:55,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 19:33:55,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 19:33:55,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 19:33:55,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 19:33:55,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:33:55" (1/1) ... [2021-08-06 19:33:55,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:33:55" (1/1) ... [2021-08-06 19:33:55,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:33:55" (1/1) ... [2021-08-06 19:33:55,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:33:55" (1/1) ... [2021-08-06 19:33:55,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:33:55" (1/1) ... [2021-08-06 19:33:55,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:33:55" (1/1) ... [2021-08-06 19:33:55,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:33:55" (1/1) ... [2021-08-06 19:33:55,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 19:33:55,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 19:33:55,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 19:33:55,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 19:33:55,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:33:55" (1/1) ... [2021-08-06 19:33:55,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:33:55,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:55,891 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 19:33:55,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 19:33:55,918 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 19:33:55,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 19:33:55,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 19:33:55,919 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 19:33:55,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 19:33:55,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 19:33:55,919 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 19:33:55,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 19:33:55,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 19:33:55,920 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 19:33:56,104 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 19:33:56,105 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-06 19:33:56,105 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-06 19:33:56,106 INFO L202 PluginConnector]: Adding new model unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:33:56 BoogieIcfgContainer [2021-08-06 19:33:56,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 19:33:56,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 19:33:56,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 19:33:56,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 19:33:56,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:33:55" (1/2) ... [2021-08-06 19:33:56,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c02cf1 and model type unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 07:33:56, skipping insertion in model container [2021-08-06 19:33:56,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:33:56" (2/2) ... [2021-08-06 19:33:56,112 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.bpl [2021-08-06 19:33:56,115 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 19:33:56,115 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 19:33:56,115 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 19:33:56,116 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 19:33:56,138 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-06 19:33:56,165 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 19:33:56,178 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 19:33:56,178 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-06 19:33:56,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 15 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) [2021-08-06 19:33:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-06 19:33:56,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:56,259 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:56,260 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:56,263 INFO L82 PathProgramCache]: Analyzing trace with hash -601032396, now seen corresponding path program 1 times [2021-08-06 19:33:56,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:56,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925463436] [2021-08-06 19:33:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:56,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:56,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:56,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925463436] [2021-08-06 19:33:56,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925463436] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:33:56,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:33:56,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 19:33:56,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743350042] [2021-08-06 19:33:56,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:33:56,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:56,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:33:56,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:33:56,505 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 15 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) Second operand has 5 states, 5 states have (on average 2.0) 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) [2021-08-06 19:33:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:56,540 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-08-06 19:33:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:33:56,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) 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 [2021-08-06 19:33:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:56,548 INFO L225 Difference]: With dead ends: 26 [2021-08-06 19:33:56,548 INFO L226 Difference]: Without dead ends: 13 [2021-08-06 19:33:56,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:33:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-06 19:33:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-06 19:33:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2021-08-06 19:33:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2021-08-06 19:33:56,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 18 transitions. Word has length 10 [2021-08-06 19:33:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:56,569 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 18 transitions. [2021-08-06 19:33:56,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) 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) [2021-08-06 19:33:56,570 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 18 transitions. [2021-08-06 19:33:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 19:33:56,571 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:56,571 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:56,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 19:33:56,571 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:56,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:56,574 INFO L82 PathProgramCache]: Analyzing trace with hash 971923841, now seen corresponding path program 1 times [2021-08-06 19:33:56,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:56,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772965775] [2021-08-06 19:33:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:56,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:56,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:56,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772965775] [2021-08-06 19:33:56,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772965775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:56,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420015640] [2021-08-06 19:33:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:56,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:56,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:56,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:56,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 19:33:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:56,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:33:56,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:56,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-08-06 19:33:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:57,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420015640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:57,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:57,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-06 19:33:57,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493375701] [2021-08-06 19:33:57,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:33:57,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:57,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:33:57,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:33:57,051 INFO L87 Difference]: Start difference. First operand 13 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:57,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:57,104 INFO L93 Difference]: Finished difference Result 20 states and 28 transitions. [2021-08-06 19:33:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:33:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:33:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:57,106 INFO L225 Difference]: With dead ends: 20 [2021-08-06 19:33:57,106 INFO L226 Difference]: Without dead ends: 16 [2021-08-06 19:33:57,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:33:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-06 19:33:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-06 19:33:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 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) [2021-08-06 19:33:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 24 transitions. [2021-08-06 19:33:57,111 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 24 transitions. Word has length 11 [2021-08-06 19:33:57,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:57,112 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 24 transitions. [2021-08-06 19:33:57,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:57,113 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 24 transitions. [2021-08-06 19:33:57,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-06 19:33:57,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:57,114 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:57,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-06 19:33:57,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:57,321 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:57,322 INFO L82 PathProgramCache]: Analyzing trace with hash -662282930, now seen corresponding path program 1 times [2021-08-06 19:33:57,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:57,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018884554] [2021-08-06 19:33:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:57,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:57,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:57,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018884554] [2021-08-06 19:33:57,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018884554] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:33:57,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:33:57,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 19:33:57,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733427635] [2021-08-06 19:33:57,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 19:33:57,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:57,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 19:33:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:33:57,353 INFO L87 Difference]: Start difference. First operand 16 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2021-08-06 19:33:57,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:57,372 INFO L93 Difference]: Finished difference Result 17 states and 26 transitions. [2021-08-06 19:33:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 19:33:57,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 [2021-08-06 19:33:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:57,373 INFO L225 Difference]: With dead ends: 17 [2021-08-06 19:33:57,373 INFO L226 Difference]: Without dead ends: 17 [2021-08-06 19:33:57,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 19:33:57,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-06 19:33:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-06 19:33:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 26 transitions. [2021-08-06 19:33:57,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 26 transitions. Word has length 11 [2021-08-06 19:33:57,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:57,378 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 26 transitions. [2021-08-06 19:33:57,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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) [2021-08-06 19:33:57,379 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 26 transitions. [2021-08-06 19:33:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 19:33:57,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:57,379 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:57,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 19:33:57,379 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:57,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:57,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1806040364, now seen corresponding path program 2 times [2021-08-06 19:33:57,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:57,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277922078] [2021-08-06 19:33:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:57,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:57,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:57,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277922078] [2021-08-06 19:33:57,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277922078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:57,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312503496] [2021-08-06 19:33:57,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:33:57,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:57,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:57,457 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:57,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 19:33:57,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:33:57,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:57,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 19:33:57,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:57,550 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:33:57,551 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:33:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:57,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312503496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:57,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:57,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-06 19:33:57,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004833651] [2021-08-06 19:33:57,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:33:57,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:57,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:33:57,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:33:57,572 INFO L87 Difference]: Start difference. First operand 17 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2021-08-06 19:33:57,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:57,603 INFO L93 Difference]: Finished difference Result 19 states and 30 transitions. [2021-08-06 19:33:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:33:57,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 [2021-08-06 19:33:57,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:57,604 INFO L225 Difference]: With dead ends: 19 [2021-08-06 19:33:57,604 INFO L226 Difference]: Without dead ends: 19 [2021-08-06 19:33:57,604 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:33:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-06 19:33:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-08-06 19:33:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 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) [2021-08-06 19:33:57,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 24 transitions. [2021-08-06 19:33:57,610 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 24 transitions. Word has length 12 [2021-08-06 19:33:57,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:57,610 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 24 transitions. [2021-08-06 19:33:57,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2021-08-06 19:33:57,610 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 24 transitions. [2021-08-06 19:33:57,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 19:33:57,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:57,612 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:57,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:57,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-06 19:33:57,829 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:57,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:57,830 INFO L82 PathProgramCache]: Analyzing trace with hash -855893147, now seen corresponding path program 1 times [2021-08-06 19:33:57,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:57,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066373608] [2021-08-06 19:33:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:57,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:57,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:57,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066373608] [2021-08-06 19:33:57,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066373608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:57,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271094877] [2021-08-06 19:33:57,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:57,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:57,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:57,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:57,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 19:33:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:57,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 19:33:57,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:57,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:33:57,949 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:33:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:57,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271094877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:57,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:57,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-06 19:33:57,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381594657] [2021-08-06 19:33:57,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:33:57,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:57,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:33:57,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:33:57,978 INFO L87 Difference]: Start difference. First operand 16 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2021-08-06 19:33:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:58,013 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-08-06 19:33:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:33:58,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 [2021-08-06 19:33:58,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:58,025 INFO L225 Difference]: With dead ends: 35 [2021-08-06 19:33:58,025 INFO L226 Difference]: Without dead ends: 34 [2021-08-06 19:33:58,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:33:58,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-06 19:33:58,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 21. [2021-08-06 19:33:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 35 transitions. [2021-08-06 19:33:58,031 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 35 transitions. Word has length 12 [2021-08-06 19:33:58,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:58,031 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 35 transitions. [2021-08-06 19:33:58,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2021-08-06 19:33:58,032 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 35 transitions. [2021-08-06 19:33:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 19:33:58,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:58,036 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:58,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:58,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:58,249 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:58,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:58,249 INFO L82 PathProgramCache]: Analyzing trace with hash 854720161, now seen corresponding path program 2 times [2021-08-06 19:33:58,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:58,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882121705] [2021-08-06 19:33:58,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:58,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:58,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:58,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882121705] [2021-08-06 19:33:58,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882121705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:58,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112571421] [2021-08-06 19:33:58,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:33:58,275 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:58,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:58,276 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:58,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 19:33:58,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:33:58,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:58,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 19:33:58,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:58,372 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:33:58,372 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:33:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:58,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112571421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:58,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:58,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-06 19:33:58,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935681926] [2021-08-06 19:33:58,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:33:58,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:58,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:33:58,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:33:58,397 INFO L87 Difference]: Start difference. First operand 21 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2021-08-06 19:33:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:58,423 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2021-08-06 19:33:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:33:58,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 [2021-08-06 19:33:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:58,426 INFO L225 Difference]: With dead ends: 27 [2021-08-06 19:33:58,426 INFO L226 Difference]: Without dead ends: 27 [2021-08-06 19:33:58,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:33:58,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-06 19:33:58,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2021-08-06 19:33:58,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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) [2021-08-06 19:33:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 32 transitions. [2021-08-06 19:33:58,428 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 32 transitions. Word has length 12 [2021-08-06 19:33:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:58,428 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 32 transitions. [2021-08-06 19:33:58,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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) [2021-08-06 19:33:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 32 transitions. [2021-08-06 19:33:58,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-06 19:33:58,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:58,428 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:58,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:58,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:58,646 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:58,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:58,647 INFO L82 PathProgramCache]: Analyzing trace with hash -8892523, now seen corresponding path program 3 times [2021-08-06 19:33:58,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:58,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004053362] [2021-08-06 19:33:58,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:58,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:58,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:58,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004053362] [2021-08-06 19:33:58,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004053362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:58,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429987598] [2021-08-06 19:33:58,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:33:58,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:58,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:58,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:58,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 19:33:58,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:33:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:58,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 19:33:58,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:58,779 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:33:58,780 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:33:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:58,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429987598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:58,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:58,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-06 19:33:58,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012274547] [2021-08-06 19:33:58,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:33:58,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:58,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:33:58,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:33:58,802 INFO L87 Difference]: Start difference. First operand 20 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:58,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:58,835 INFO L93 Difference]: Finished difference Result 23 states and 38 transitions. [2021-08-06 19:33:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 19:33:58,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-06 19:33:58,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:58,837 INFO L225 Difference]: With dead ends: 23 [2021-08-06 19:33:58,837 INFO L226 Difference]: Without dead ends: 23 [2021-08-06 19:33:58,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:33:58,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-06 19:33:58,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-08-06 19:33:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 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) [2021-08-06 19:33:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 36 transitions. [2021-08-06 19:33:58,840 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 36 transitions. Word has length 12 [2021-08-06 19:33:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:58,841 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 36 transitions. [2021-08-06 19:33:58,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 36 transitions. [2021-08-06 19:33:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 19:33:58,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:58,843 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:58,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:59,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:59,053 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:59,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:59,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1073437582, now seen corresponding path program 4 times [2021-08-06 19:33:59,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:59,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250767625] [2021-08-06 19:33:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:59,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:59,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:59,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250767625] [2021-08-06 19:33:59,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250767625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:59,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515685106] [2021-08-06 19:33:59,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:33:59,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:59,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:59,155 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:59,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 19:33:59,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:33:59,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:59,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 19:33:59,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:59,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:33:59,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2021-08-06 19:33:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:59,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515685106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:59,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:59,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:33:59,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57311642] [2021-08-06 19:33:59,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:33:59,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:59,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:33:59,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:33:59,483 INFO L87 Difference]: Start difference. First operand 22 states and 36 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:59,556 INFO L93 Difference]: Finished difference Result 32 states and 51 transitions. [2021-08-06 19:33:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:33:59,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:33:59,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:59,557 INFO L225 Difference]: With dead ends: 32 [2021-08-06 19:33:59,557 INFO L226 Difference]: Without dead ends: 26 [2021-08-06 19:33:59,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-06 19:33:59,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-08-06 19:33:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:59,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 40 transitions. [2021-08-06 19:33:59,559 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 40 transitions. Word has length 13 [2021-08-06 19:33:59,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:59,560 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 40 transitions. [2021-08-06 19:33:59,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:59,560 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 40 transitions. [2021-08-06 19:33:59,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 19:33:59,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:59,560 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:59,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:59,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:59,773 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:33:59,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:59,773 INFO L82 PathProgramCache]: Analyzing trace with hash 637175726, now seen corresponding path program 5 times [2021-08-06 19:33:59,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:59,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791933479] [2021-08-06 19:33:59,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:59,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:59,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:59,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791933479] [2021-08-06 19:33:59,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791933479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:59,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541778320] [2021-08-06 19:33:59,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:33:59,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:59,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:59,853 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:59,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 19:33:59,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:33:59,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:59,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 19:33:59,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:00,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:00,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 59 [2021-08-06 19:34:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:00,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541778320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:00,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:00,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:34:00,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505081662] [2021-08-06 19:34:00,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:34:00,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:00,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:34:00,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:00,197 INFO L87 Difference]: Start difference. First operand 24 states and 40 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:00,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:00,291 INFO L93 Difference]: Finished difference Result 41 states and 66 transitions. [2021-08-06 19:34:00,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:34:00,291 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:34:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:00,292 INFO L225 Difference]: With dead ends: 41 [2021-08-06 19:34:00,292 INFO L226 Difference]: Without dead ends: 31 [2021-08-06 19:34:00,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:34:00,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-06 19:34:00,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2021-08-06 19:34:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:00,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 48 transitions. [2021-08-06 19:34:00,294 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 48 transitions. Word has length 13 [2021-08-06 19:34:00,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:00,294 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 48 transitions. [2021-08-06 19:34:00,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:00,294 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 48 transitions. [2021-08-06 19:34:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 19:34:00,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:00,295 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:00,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:00,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:00,509 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:00,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:00,509 INFO L82 PathProgramCache]: Analyzing trace with hash -226436958, now seen corresponding path program 6 times [2021-08-06 19:34:00,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:00,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183636281] [2021-08-06 19:34:00,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:00,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:00,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:00,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183636281] [2021-08-06 19:34:00,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183636281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:00,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198000815] [2021-08-06 19:34:00,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:00,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:00,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:00,605 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:00,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 19:34:00,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 19:34:00,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:00,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 19:34:00,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:00,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:00,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2021-08-06 19:34:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:00,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198000815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:00,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:00,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:34:00,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305528986] [2021-08-06 19:34:00,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:34:00,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:00,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:34:00,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:00,927 INFO L87 Difference]: Start difference. First operand 27 states and 48 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:01,011 INFO L93 Difference]: Finished difference Result 44 states and 74 transitions. [2021-08-06 19:34:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:34:01,011 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:34:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:01,012 INFO L225 Difference]: With dead ends: 44 [2021-08-06 19:34:01,012 INFO L226 Difference]: Without dead ends: 34 [2021-08-06 19:34:01,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:34:01,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-06 19:34:01,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-08-06 19:34:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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) [2021-08-06 19:34:01,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 60 transitions. [2021-08-06 19:34:01,014 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 60 transitions. Word has length 13 [2021-08-06 19:34:01,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:01,014 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 60 transitions. [2021-08-06 19:34:01,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:01,014 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 60 transitions. [2021-08-06 19:34:01,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-06 19:34:01,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:01,015 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:01,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:01,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-06 19:34:01,234 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:01,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:01,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1228626386, now seen corresponding path program 7 times [2021-08-06 19:34:01,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:01,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844619804] [2021-08-06 19:34:01,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:01,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:01,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:01,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844619804] [2021-08-06 19:34:01,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844619804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:01,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643262918] [2021-08-06 19:34:01,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:01,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:01,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:01,313 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:01,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 19:34:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:01,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 19:34:01,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:01,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:01,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 55 [2021-08-06 19:34:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:01,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643262918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:01,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:01,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:34:01,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092434491] [2021-08-06 19:34:01,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:34:01,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:01,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:34:01,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:01,672 INFO L87 Difference]: Start difference. First operand 32 states and 60 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:01,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:01,747 INFO L93 Difference]: Finished difference Result 50 states and 88 transitions. [2021-08-06 19:34:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:34:01,748 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:34:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:01,748 INFO L225 Difference]: With dead ends: 50 [2021-08-06 19:34:01,748 INFO L226 Difference]: Without dead ends: 40 [2021-08-06 19:34:01,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:34:01,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-06 19:34:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-08-06 19:34:01,750 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) [2021-08-06 19:34:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 72 transitions. [2021-08-06 19:34:01,751 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 72 transitions. Word has length 13 [2021-08-06 19:34:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:01,751 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 72 transitions. [2021-08-06 19:34:01,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 72 transitions. [2021-08-06 19:34:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:34:01,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:01,751 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:01,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:01,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:01,968 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash 772619525, now seen corresponding path program 8 times [2021-08-06 19:34:01,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:01,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515174017] [2021-08-06 19:34:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:01,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:02,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:02,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515174017] [2021-08-06 19:34:02,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515174017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:02,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219933672] [2021-08-06 19:34:02,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:02,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:02,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:02,042 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:02,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 19:34:02,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:02,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:02,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:34:02,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:02,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:02,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 55 [2021-08-06 19:34:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:02,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219933672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:02,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:02,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:34:02,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920341072] [2021-08-06 19:34:02,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:34:02,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:02,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:34:02,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:02,426 INFO L87 Difference]: Start difference. First operand 37 states and 72 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:34:02,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:02,537 INFO L93 Difference]: Finished difference Result 48 states and 90 transitions. [2021-08-06 19:34:02,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:34:02,538 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14 [2021-08-06 19:34:02,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:02,538 INFO L225 Difference]: With dead ends: 48 [2021-08-06 19:34:02,538 INFO L226 Difference]: Without dead ends: 44 [2021-08-06 19:34:02,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:34:02,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-06 19:34:02,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-08-06 19:34:02,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 81 transitions. [2021-08-06 19:34:02,541 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 81 transitions. Word has length 14 [2021-08-06 19:34:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:02,541 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 81 transitions. [2021-08-06 19:34:02,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:34:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 81 transitions. [2021-08-06 19:34:02,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:34:02,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:02,541 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:02,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:02,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-06 19:34:02,757 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1619620149, now seen corresponding path program 9 times [2021-08-06 19:34:02,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:02,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597691546] [2021-08-06 19:34:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:02,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:02,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:02,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597691546] [2021-08-06 19:34:02,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597691546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:02,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217804266] [2021-08-06 19:34:02,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:02,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:02,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:02,828 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:02,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 19:34:02,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:34:02,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:02,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:34:02,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:03,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:03,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 55 [2021-08-06 19:34:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:03,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217804266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:03,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:03,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:34:03,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104616571] [2021-08-06 19:34:03,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:34:03,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:03,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:34:03,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:03,175 INFO L87 Difference]: Start difference. First operand 41 states and 81 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:34:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:03,317 INFO L93 Difference]: Finished difference Result 51 states and 97 transitions. [2021-08-06 19:34:03,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:34:03,318 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14 [2021-08-06 19:34:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:03,318 INFO L225 Difference]: With dead ends: 51 [2021-08-06 19:34:03,318 INFO L226 Difference]: Without dead ends: 47 [2021-08-06 19:34:03,319 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:34:03,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-06 19:34:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-08-06 19:34:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:03,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 81 transitions. [2021-08-06 19:34:03,325 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 81 transitions. Word has length 14 [2021-08-06 19:34:03,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:03,326 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 81 transitions. [2021-08-06 19:34:03,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:34:03,326 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 81 transitions. [2021-08-06 19:34:03,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:34:03,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:03,326 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:03,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:03,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 19:34:03,541 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash -932536812, now seen corresponding path program 10 times [2021-08-06 19:34:03,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:03,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349233117] [2021-08-06 19:34:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:03,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:03,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:03,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349233117] [2021-08-06 19:34:03,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349233117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:03,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614567166] [2021-08-06 19:34:03,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:03,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:03,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:03,582 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:03,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 19:34:03,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:03,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:03,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 19:34:03,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:03,758 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:03,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:03,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614567166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:03,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:03,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 19:34:03,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369526840] [2021-08-06 19:34:03,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:34:03,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:03,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:34:03,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:34:03,786 INFO L87 Difference]: Start difference. First operand 41 states and 81 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:03,819 INFO L93 Difference]: Finished difference Result 75 states and 123 transitions. [2021-08-06 19:34:03,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:34:03,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:34:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:03,820 INFO L225 Difference]: With dead ends: 75 [2021-08-06 19:34:03,820 INFO L226 Difference]: Without dead ends: 75 [2021-08-06 19:34:03,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:03,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-06 19:34:03,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2021-08-06 19:34:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 92 transitions. [2021-08-06 19:34:03,829 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 92 transitions. Word has length 14 [2021-08-06 19:34:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:03,830 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 92 transitions. [2021-08-06 19:34:03,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 92 transitions. [2021-08-06 19:34:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:34:03,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:03,831 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:03,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:04,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 19:34:04,045 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:04,045 INFO L82 PathProgramCache]: Analyzing trace with hash 617430721, now seen corresponding path program 11 times [2021-08-06 19:34:04,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:04,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86660325] [2021-08-06 19:34:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:04,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:04,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:04,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86660325] [2021-08-06 19:34:04,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86660325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:04,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220843246] [2021-08-06 19:34:04,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:04,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:04,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:04,145 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:04,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 19:34:04,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:34:04,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:04,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:34:04,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:04,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:04,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 55 [2021-08-06 19:34:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:04,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220843246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:04,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:04,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:34:04,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138250315] [2021-08-06 19:34:04,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:34:04,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:04,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:34:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:04,558 INFO L87 Difference]: Start difference. First operand 45 states and 92 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:34:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:04,671 INFO L93 Difference]: Finished difference Result 53 states and 104 transitions. [2021-08-06 19:34:04,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:34:04,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14 [2021-08-06 19:34:04,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:04,672 INFO L225 Difference]: With dead ends: 53 [2021-08-06 19:34:04,672 INFO L226 Difference]: Without dead ends: 49 [2021-08-06 19:34:04,673 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:34:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-06 19:34:04,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-08-06 19:34:04,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 92 transitions. [2021-08-06 19:34:04,680 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 92 transitions. Word has length 14 [2021-08-06 19:34:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:04,680 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 92 transitions. [2021-08-06 19:34:04,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:34:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 92 transitions. [2021-08-06 19:34:04,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:34:04,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:04,683 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:04,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:04,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 19:34:04,897 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:04,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:04,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1190023742, now seen corresponding path program 12 times [2021-08-06 19:34:04,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:04,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688136268] [2021-08-06 19:34:04,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:04,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:04,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:04,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:04,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688136268] [2021-08-06 19:34:04,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688136268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:04,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142444272] [2021-08-06 19:34:04,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:04,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:04,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:04,931 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:04,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 19:34:05,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:34:05,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:05,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 19:34:05,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:05,132 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:05,133 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:05,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142444272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:05,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:05,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 19:34:05,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938222028] [2021-08-06 19:34:05,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:34:05,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:05,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:34:05,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:05,153 INFO L87 Difference]: Start difference. First operand 45 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:05,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:05,217 INFO L93 Difference]: Finished difference Result 89 states and 147 transitions. [2021-08-06 19:34:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:34:05,217 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:34:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:05,218 INFO L225 Difference]: With dead ends: 89 [2021-08-06 19:34:05,218 INFO L226 Difference]: Without dead ends: 89 [2021-08-06 19:34:05,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:34:05,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-06 19:34:05,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 51. [2021-08-06 19:34:05,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.14) internal successors, (107), 50 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) [2021-08-06 19:34:05,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 107 transitions. [2021-08-06 19:34:05,220 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 107 transitions. Word has length 14 [2021-08-06 19:34:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:05,220 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 107 transitions. [2021-08-06 19:34:05,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 107 transitions. [2021-08-06 19:34:05,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:34:05,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:05,220 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:05,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-06 19:34:05,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:05,437 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:05,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:05,437 INFO L82 PathProgramCache]: Analyzing trace with hash -385670475, now seen corresponding path program 13 times [2021-08-06 19:34:05,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:05,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37597323] [2021-08-06 19:34:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:05,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:05,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:05,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37597323] [2021-08-06 19:34:05,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37597323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:05,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268755731] [2021-08-06 19:34:05,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:05,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:05,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:05,512 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:05,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 19:34:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:05,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 19:34:05,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:05,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:05,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 55 [2021-08-06 19:34:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:05,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268755731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:05,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:05,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 19:34:05,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108533155] [2021-08-06 19:34:05,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:34:05,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:05,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:34:05,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:05,914 INFO L87 Difference]: Start difference. First operand 51 states and 107 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:34:06,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:06,012 INFO L93 Difference]: Finished difference Result 62 states and 126 transitions. [2021-08-06 19:34:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:34:06,012 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14 [2021-08-06 19:34:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:06,013 INFO L225 Difference]: With dead ends: 62 [2021-08-06 19:34:06,013 INFO L226 Difference]: Without dead ends: 58 [2021-08-06 19:34:06,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:34:06,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-06 19:34:06,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2021-08-06 19:34:06,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.14) internal successors, (107), 50 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) [2021-08-06 19:34:06,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 107 transitions. [2021-08-06 19:34:06,015 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 107 transitions. Word has length 14 [2021-08-06 19:34:06,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:06,015 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 107 transitions. [2021-08-06 19:34:06,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:34:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 107 transitions. [2021-08-06 19:34:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:34:06,015 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:06,015 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:06,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-06 19:34:06,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 19:34:06,225 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:06,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:06,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1357139860, now seen corresponding path program 14 times [2021-08-06 19:34:06,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:06,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062823203] [2021-08-06 19:34:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:06,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:06,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:06,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062823203] [2021-08-06 19:34:06,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062823203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:06,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221187789] [2021-08-06 19:34:06,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:06,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:06,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:06,281 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:06,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 19:34:06,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:06,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:06,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 19:34:06,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:06,498 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:06,499 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:06,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221187789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:06,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:06,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 19:34:06,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653585905] [2021-08-06 19:34:06,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:34:06,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:06,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:34:06,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:34:06,520 INFO L87 Difference]: Start difference. First operand 51 states and 107 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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) [2021-08-06 19:34:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:06,550 INFO L93 Difference]: Finished difference Result 83 states and 151 transitions. [2021-08-06 19:34:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:34:06,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 14 [2021-08-06 19:34:06,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:06,551 INFO L225 Difference]: With dead ends: 83 [2021-08-06 19:34:06,551 INFO L226 Difference]: Without dead ends: 83 [2021-08-06 19:34:06,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:06,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-06 19:34:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2021-08-06 19:34:06,553 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) [2021-08-06 19:34:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 127 transitions. [2021-08-06 19:34:06,554 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 127 transitions. Word has length 14 [2021-08-06 19:34:06,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:06,554 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 127 transitions. [2021-08-06 19:34:06,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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) [2021-08-06 19:34:06,554 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 127 transitions. [2021-08-06 19:34:06,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:34:06,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:06,554 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:06,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:06,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 19:34:06,769 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:06,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:06,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2101842358, now seen corresponding path program 15 times [2021-08-06 19:34:06,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:06,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034097846] [2021-08-06 19:34:06,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:06,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:06,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:06,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034097846] [2021-08-06 19:34:06,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034097846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:06,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556765313] [2021-08-06 19:34:06,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:06,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:06,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:06,817 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:06,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 19:34:07,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:34:07,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:07,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 19:34:07,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:07,066 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:07,067 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:07,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556765313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:07,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:07,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 19:34:07,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202190844] [2021-08-06 19:34:07,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:34:07,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:07,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:34:07,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:07,089 INFO L87 Difference]: Start difference. First operand 60 states and 127 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-08-06 19:34:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:07,144 INFO L93 Difference]: Finished difference Result 90 states and 158 transitions. [2021-08-06 19:34:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:34:07,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 14 [2021-08-06 19:34:07,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:07,145 INFO L225 Difference]: With dead ends: 90 [2021-08-06 19:34:07,145 INFO L226 Difference]: Without dead ends: 90 [2021-08-06 19:34:07,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:34:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-06 19:34:07,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 56. [2021-08-06 19:34:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 55 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 118 transitions. [2021-08-06 19:34:07,148 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 118 transitions. Word has length 14 [2021-08-06 19:34:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:07,148 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 118 transitions. [2021-08-06 19:34:07,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-08-06 19:34:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 118 transitions. [2021-08-06 19:34:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-06 19:34:07,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:07,148 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:07,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:07,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:07,357 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:07,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:07,357 INFO L82 PathProgramCache]: Analyzing trace with hash -582183980, now seen corresponding path program 16 times [2021-08-06 19:34:07,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:07,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993704617] [2021-08-06 19:34:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:07,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:07,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:07,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993704617] [2021-08-06 19:34:07,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993704617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:07,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413326628] [2021-08-06 19:34:07,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:07,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:07,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:07,398 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:07,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 19:34:07,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:07,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:07,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 19:34:07,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:07,620 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:07,620 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:07,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413326628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:07,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:07,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 19:34:07,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155005984] [2021-08-06 19:34:07,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:34:07,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:07,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:34:07,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:07,647 INFO L87 Difference]: Start difference. First operand 56 states and 118 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-08-06 19:34:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:07,703 INFO L93 Difference]: Finished difference Result 65 states and 136 transitions. [2021-08-06 19:34:07,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:34:07,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 14 [2021-08-06 19:34:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:07,704 INFO L225 Difference]: With dead ends: 65 [2021-08-06 19:34:07,704 INFO L226 Difference]: Without dead ends: 65 [2021-08-06 19:34:07,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:07,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-06 19:34:07,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2021-08-06 19:34:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1333333333333333) internal successors, (128), 60 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) [2021-08-06 19:34:07,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 128 transitions. [2021-08-06 19:34:07,706 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 128 transitions. Word has length 14 [2021-08-06 19:34:07,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:07,706 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 128 transitions. [2021-08-06 19:34:07,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-08-06 19:34:07,706 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 128 transitions. [2021-08-06 19:34:07,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:07,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:07,706 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:07,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:07,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:07,920 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:07,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2129152302, now seen corresponding path program 17 times [2021-08-06 19:34:07,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:07,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367675121] [2021-08-06 19:34:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:07,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:07,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:07,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367675121] [2021-08-06 19:34:07,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367675121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:07,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494055762] [2021-08-06 19:34:07,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:07,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:07,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:07,966 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:07,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 19:34:08,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:34:08,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:08,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:08,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:08,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:08,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:08,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494055762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:08,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:08,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 19:34:08,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181078154] [2021-08-06 19:34:08,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:34:08,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:08,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:34:08,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:34:08,210 INFO L87 Difference]: Start difference. First operand 61 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-08-06 19:34:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:08,278 INFO L93 Difference]: Finished difference Result 82 states and 164 transitions. [2021-08-06 19:34:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:34:08,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 15 [2021-08-06 19:34:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:08,279 INFO L225 Difference]: With dead ends: 82 [2021-08-06 19:34:08,279 INFO L226 Difference]: Without dead ends: 82 [2021-08-06 19:34:08,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:08,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-06 19:34:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2021-08-06 19:34:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.1904761904761907) internal successors, (138), 63 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) [2021-08-06 19:34:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 138 transitions. [2021-08-06 19:34:08,281 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 138 transitions. Word has length 15 [2021-08-06 19:34:08,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:08,281 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 138 transitions. [2021-08-06 19:34:08,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-08-06 19:34:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 138 transitions. [2021-08-06 19:34:08,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:08,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:08,282 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:08,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:08,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:08,494 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:08,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1555607649, now seen corresponding path program 18 times [2021-08-06 19:34:08,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:08,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705364608] [2021-08-06 19:34:08,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:08,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:08,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:08,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705364608] [2021-08-06 19:34:08,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705364608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:08,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738465101] [2021-08-06 19:34:08,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:08,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:08,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:08,536 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:08,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 19:34:08,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:34:08,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:08,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:08,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:08,770 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:08,771 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:08,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738465101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:08,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:08,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 19:34:08,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136887990] [2021-08-06 19:34:08,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:34:08,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:08,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:34:08,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:34:08,791 INFO L87 Difference]: Start difference. First operand 64 states and 138 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-08-06 19:34:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:08,863 INFO L93 Difference]: Finished difference Result 107 states and 199 transitions. [2021-08-06 19:34:08,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:34:08,865 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 15 [2021-08-06 19:34:08,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:08,866 INFO L225 Difference]: With dead ends: 107 [2021-08-06 19:34:08,866 INFO L226 Difference]: Without dead ends: 105 [2021-08-06 19:34:08,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:34:08,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-06 19:34:08,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 72. [2021-08-06 19:34:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.23943661971831) internal successors, (159), 71 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:08,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 159 transitions. [2021-08-06 19:34:08,868 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 159 transitions. Word has length 15 [2021-08-06 19:34:08,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:08,868 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 159 transitions. [2021-08-06 19:34:08,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-08-06 19:34:08,868 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 159 transitions. [2021-08-06 19:34:08,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:08,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:08,868 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:08,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:09,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-06 19:34:09,084 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:09,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:09,084 INFO L82 PathProgramCache]: Analyzing trace with hash 460658657, now seen corresponding path program 19 times [2021-08-06 19:34:09,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:09,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721833153] [2021-08-06 19:34:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:09,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:09,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:09,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:09,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721833153] [2021-08-06 19:34:09,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721833153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:09,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769413274] [2021-08-06 19:34:09,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:09,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:09,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:09,121 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:09,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 19:34:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:09,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:09,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:09,379 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:09,379 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:09,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769413274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:09,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:09,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 19:34:09,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145393104] [2021-08-06 19:34:09,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:34:09,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:09,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:34:09,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:09,401 INFO L87 Difference]: Start difference. First operand 72 states and 159 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-08-06 19:34:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:09,441 INFO L93 Difference]: Finished difference Result 101 states and 187 transitions. [2021-08-06 19:34:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:34:09,441 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 15 [2021-08-06 19:34:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:09,442 INFO L225 Difference]: With dead ends: 101 [2021-08-06 19:34:09,442 INFO L226 Difference]: Without dead ends: 101 [2021-08-06 19:34:09,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:34:09,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-06 19:34:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 69. [2021-08-06 19:34:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.2058823529411766) internal successors, (150), 68 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:09,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 150 transitions. [2021-08-06 19:34:09,443 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 150 transitions. Word has length 15 [2021-08-06 19:34:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:09,444 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 150 transitions. [2021-08-06 19:34:09,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-08-06 19:34:09,444 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 150 transitions. [2021-08-06 19:34:09,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:09,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:09,444 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:09,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:09,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-06 19:34:09,649 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash 203171727, now seen corresponding path program 20 times [2021-08-06 19:34:09,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:09,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440740174] [2021-08-06 19:34:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:09,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:09,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:09,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440740174] [2021-08-06 19:34:09,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440740174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:09,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396593345] [2021-08-06 19:34:09,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:09,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:09,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:09,697 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:09,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 19:34:09,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:09,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:09,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:09,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:09,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:09,931 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:09,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396593345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:09,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:09,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:34:09,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232312797] [2021-08-06 19:34:09,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:34:09,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:09,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:34:09,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:09,951 INFO L87 Difference]: Start difference. First operand 69 states and 150 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-08-06 19:34:10,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:10,005 INFO L93 Difference]: Finished difference Result 99 states and 189 transitions. [2021-08-06 19:34:10,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:34:10,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 15 [2021-08-06 19:34:10,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:10,007 INFO L225 Difference]: With dead ends: 99 [2021-08-06 19:34:10,007 INFO L226 Difference]: Without dead ends: 99 [2021-08-06 19:34:10,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:34:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-06 19:34:10,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2021-08-06 19:34:10,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.2058823529411766) internal successors, (150), 68 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 150 transitions. [2021-08-06 19:34:10,009 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 150 transitions. Word has length 15 [2021-08-06 19:34:10,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:10,009 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 150 transitions. [2021-08-06 19:34:10,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-08-06 19:34:10,009 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 150 transitions. [2021-08-06 19:34:10,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:10,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:10,009 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:10,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:10,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:10,225 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:10,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:10,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1039722021, now seen corresponding path program 21 times [2021-08-06 19:34:10,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:10,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270441304] [2021-08-06 19:34:10,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:10,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:10,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:10,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270441304] [2021-08-06 19:34:10,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270441304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:10,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352311141] [2021-08-06 19:34:10,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:10,267 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:10,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:10,269 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:10,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 19:34:10,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:34:10,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:10,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:10,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:10,559 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:10,560 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:10,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352311141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:10,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:10,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 19:34:10,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880308365] [2021-08-06 19:34:10,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:34:10,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:10,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:34:10,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:34:10,581 INFO L87 Difference]: Start difference. First operand 69 states and 150 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:10,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:10,616 INFO L93 Difference]: Finished difference Result 97 states and 183 transitions. [2021-08-06 19:34:10,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:34:10,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:34:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:10,617 INFO L225 Difference]: With dead ends: 97 [2021-08-06 19:34:10,617 INFO L226 Difference]: Without dead ends: 96 [2021-08-06 19:34:10,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:34:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-06 19:34:10,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2021-08-06 19:34:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 74 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 164 transitions. [2021-08-06 19:34:10,623 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 164 transitions. Word has length 15 [2021-08-06 19:34:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:10,623 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 164 transitions. [2021-08-06 19:34:10,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:10,624 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 164 transitions. [2021-08-06 19:34:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:10,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:10,624 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:10,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:10,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:10,825 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1007524994, now seen corresponding path program 22 times [2021-08-06 19:34:10,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:10,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229029656] [2021-08-06 19:34:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:10,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:10,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:10,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229029656] [2021-08-06 19:34:10,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229029656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:10,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146037310] [2021-08-06 19:34:10,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:10,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:10,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:10,869 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:10,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 19:34:11,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:11,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:11,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:11,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:11,121 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:11,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:11,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146037310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:11,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:11,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 19:34:11,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885109573] [2021-08-06 19:34:11,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:34:11,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:11,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:34:11,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:34:11,139 INFO L87 Difference]: Start difference. First operand 75 states and 164 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:11,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:11,168 INFO L93 Difference]: Finished difference Result 119 states and 245 transitions. [2021-08-06 19:34:11,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:34:11,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:34:11,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:11,169 INFO L225 Difference]: With dead ends: 119 [2021-08-06 19:34:11,169 INFO L226 Difference]: Without dead ends: 119 [2021-08-06 19:34:11,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-06 19:34:11,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 83. [2021-08-06 19:34:11,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.292682926829268) internal successors, (188), 82 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:11,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 188 transitions. [2021-08-06 19:34:11,171 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 188 transitions. Word has length 15 [2021-08-06 19:34:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:11,171 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 188 transitions. [2021-08-06 19:34:11,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:11,172 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 188 transitions. [2021-08-06 19:34:11,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:11,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:11,172 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:11,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:11,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-06 19:34:11,385 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:11,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1544631967, now seen corresponding path program 23 times [2021-08-06 19:34:11,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:11,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806023764] [2021-08-06 19:34:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:11,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:11,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:11,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806023764] [2021-08-06 19:34:11,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806023764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:11,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963881842] [2021-08-06 19:34:11,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:11,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:11,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:11,425 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:11,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 19:34:11,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:34:11,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:11,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:11,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:11,683 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:11,684 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:34:11,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963881842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:11,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:11,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 19:34:11,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181904328] [2021-08-06 19:34:11,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:34:11,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:11,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:34:11,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:34:11,704 INFO L87 Difference]: Start difference. First operand 83 states and 188 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:11,726 INFO L93 Difference]: Finished difference Result 97 states and 198 transitions. [2021-08-06 19:34:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:34:11,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:34:11,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:11,727 INFO L225 Difference]: With dead ends: 97 [2021-08-06 19:34:11,727 INFO L226 Difference]: Without dead ends: 97 [2021-08-06 19:34:11,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-06 19:34:11,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 81. [2021-08-06 19:34:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.275) internal successors, (182), 80 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 182 transitions. [2021-08-06 19:34:11,729 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 182 transitions. Word has length 15 [2021-08-06 19:34:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:11,729 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 182 transitions. [2021-08-06 19:34:11,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:11,729 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 182 transitions. [2021-08-06 19:34:11,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:11,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:11,729 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:11,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:11,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 19:34:11,930 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:11,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:11,930 INFO L82 PathProgramCache]: Analyzing trace with hash -799929469, now seen corresponding path program 24 times [2021-08-06 19:34:11,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:11,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721098413] [2021-08-06 19:34:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:11,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:11,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:11,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721098413] [2021-08-06 19:34:11,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721098413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:11,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977377474] [2021-08-06 19:34:11,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:11,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:11,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:11,977 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:11,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 19:34:12,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:34:12,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:12,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:12,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:12,219 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:12,220 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:12,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977377474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:12,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:12,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:34:12,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259337588] [2021-08-06 19:34:12,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:34:12,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:12,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:34:12,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:12,240 INFO L87 Difference]: Start difference. First operand 81 states and 182 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-08-06 19:34:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:12,284 INFO L93 Difference]: Finished difference Result 97 states and 198 transitions. [2021-08-06 19:34:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:34:12,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 15 [2021-08-06 19:34:12,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:12,285 INFO L225 Difference]: With dead ends: 97 [2021-08-06 19:34:12,285 INFO L226 Difference]: Without dead ends: 97 [2021-08-06 19:34:12,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:34:12,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-06 19:34:12,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2021-08-06 19:34:12,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2666666666666666) internal successors, (170), 75 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:12,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 170 transitions. [2021-08-06 19:34:12,287 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 170 transitions. Word has length 15 [2021-08-06 19:34:12,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:12,287 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 170 transitions. [2021-08-06 19:34:12,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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) [2021-08-06 19:34:12,287 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 170 transitions. [2021-08-06 19:34:12,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:12,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:12,287 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:12,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:12,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 19:34:12,501 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash 811011489, now seen corresponding path program 25 times [2021-08-06 19:34:12,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:12,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890434434] [2021-08-06 19:34:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:12,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:12,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:12,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890434434] [2021-08-06 19:34:12,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890434434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:12,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966497853] [2021-08-06 19:34:12,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:12,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:12,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:12,538 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:12,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 19:34:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:12,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:12,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:12,800 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:12,800 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:12,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966497853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:12,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:12,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 19:34:12,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235884345] [2021-08-06 19:34:12,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:34:12,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:12,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:34:12,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:34:12,821 INFO L87 Difference]: Start difference. First operand 76 states and 170 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-08-06 19:34:12,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:12,891 INFO L93 Difference]: Finished difference Result 93 states and 188 transitions. [2021-08-06 19:34:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:34:12,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 15 [2021-08-06 19:34:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:12,892 INFO L225 Difference]: With dead ends: 93 [2021-08-06 19:34:12,892 INFO L226 Difference]: Without dead ends: 93 [2021-08-06 19:34:12,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:34:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-06 19:34:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2021-08-06 19:34:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.2739726027397262) internal successors, (166), 73 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 166 transitions. [2021-08-06 19:34:12,894 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 166 transitions. Word has length 15 [2021-08-06 19:34:12,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:12,894 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 166 transitions. [2021-08-06 19:34:12,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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) [2021-08-06 19:34:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 166 transitions. [2021-08-06 19:34:12,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:12,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:12,895 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:12,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:13,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 19:34:13,098 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:13,098 INFO L82 PathProgramCache]: Analyzing trace with hash 8356017, now seen corresponding path program 26 times [2021-08-06 19:34:13,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:13,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066247339] [2021-08-06 19:34:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:13,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:13,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:13,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066247339] [2021-08-06 19:34:13,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066247339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:13,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534584137] [2021-08-06 19:34:13,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:13,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:13,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:13,137 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:13,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 19:34:13,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:13,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:13,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:13,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:13,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:13,417 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:13,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:13,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534584137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:13,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:13,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:34:13,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834766709] [2021-08-06 19:34:13,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:34:13,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:13,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:34:13,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:13,439 INFO L87 Difference]: Start difference. First operand 74 states and 166 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-08-06 19:34:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:13,498 INFO L93 Difference]: Finished difference Result 109 states and 205 transitions. [2021-08-06 19:34:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:34:13,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 15 [2021-08-06 19:34:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:13,501 INFO L225 Difference]: With dead ends: 109 [2021-08-06 19:34:13,501 INFO L226 Difference]: Without dead ends: 108 [2021-08-06 19:34:13,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:34:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-06 19:34:13,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 79. [2021-08-06 19:34:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.2948717948717947) internal successors, (179), 78 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 179 transitions. [2021-08-06 19:34:13,503 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 179 transitions. Word has length 15 [2021-08-06 19:34:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:13,503 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 179 transitions. [2021-08-06 19:34:13,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-08-06 19:34:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 179 transitions. [2021-08-06 19:34:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:13,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:13,504 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:13,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:13,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:13,721 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:13,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:13,721 INFO L82 PathProgramCache]: Analyzing trace with hash -23841010, now seen corresponding path program 27 times [2021-08-06 19:34:13,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:13,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032340314] [2021-08-06 19:34:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:13,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:13,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:13,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032340314] [2021-08-06 19:34:13,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032340314] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:13,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635472713] [2021-08-06 19:34:13,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:13,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:13,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:13,764 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:13,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 19:34:13,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:34:13,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:13,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:13,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:14,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:14,024 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:14,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635472713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:14,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:14,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:34:14,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139824072] [2021-08-06 19:34:14,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:34:14,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:14,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:34:14,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:14,041 INFO L87 Difference]: Start difference. First operand 79 states and 179 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-08-06 19:34:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:14,074 INFO L93 Difference]: Finished difference Result 136 states and 281 transitions. [2021-08-06 19:34:14,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:34:14,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 15 [2021-08-06 19:34:14,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:14,077 INFO L225 Difference]: With dead ends: 136 [2021-08-06 19:34:14,077 INFO L226 Difference]: Without dead ends: 136 [2021-08-06 19:34:14,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:34:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-06 19:34:14,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 94. [2021-08-06 19:34:14,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3655913978494625) internal successors, (220), 93 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:14,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 220 transitions. [2021-08-06 19:34:14,081 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 220 transitions. Word has length 15 [2021-08-06 19:34:14,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:14,082 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 220 transitions. [2021-08-06 19:34:14,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-08-06 19:34:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 220 transitions. [2021-08-06 19:34:14,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:14,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:14,083 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:14,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:14,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:14,289 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:14,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1718969325, now seen corresponding path program 28 times [2021-08-06 19:34:14,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:14,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236606250] [2021-08-06 19:34:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:14,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:14,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:14,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236606250] [2021-08-06 19:34:14,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236606250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:14,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255250933] [2021-08-06 19:34:14,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:14,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:14,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:14,334 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:14,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 19:34:14,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:14,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:14,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:14,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:14,598 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:14,599 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:14,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255250933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:14,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:14,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:34:14,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358397924] [2021-08-06 19:34:14,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:34:14,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:34:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:14,620 INFO L87 Difference]: Start difference. First operand 94 states and 220 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-08-06 19:34:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:14,672 INFO L93 Difference]: Finished difference Result 117 states and 240 transitions. [2021-08-06 19:34:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:34:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 15 [2021-08-06 19:34:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:14,673 INFO L225 Difference]: With dead ends: 117 [2021-08-06 19:34:14,673 INFO L226 Difference]: Without dead ends: 117 [2021-08-06 19:34:14,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:34:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-06 19:34:14,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2021-08-06 19:34:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.3404255319148937) internal successors, (220), 94 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 220 transitions. [2021-08-06 19:34:14,676 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 220 transitions. Word has length 15 [2021-08-06 19:34:14,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:14,677 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 220 transitions. [2021-08-06 19:34:14,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-08-06 19:34:14,677 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 220 transitions. [2021-08-06 19:34:14,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:14,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:14,677 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:14,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:14,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-06 19:34:14,881 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:14,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:14,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1831295473, now seen corresponding path program 29 times [2021-08-06 19:34:14,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:14,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687939725] [2021-08-06 19:34:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:14,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:14,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:14,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687939725] [2021-08-06 19:34:14,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687939725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:14,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788919863] [2021-08-06 19:34:14,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:14,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:14,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:14,920 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:14,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 19:34:15,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:34:15,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:15,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:15,192 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:15,192 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:15,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788919863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:15,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:15,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-06 19:34:15,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586564600] [2021-08-06 19:34:15,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:34:15,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:15,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:34:15,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:34:15,225 INFO L87 Difference]: Start difference. First operand 95 states and 220 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-08-06 19:34:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:15,258 INFO L93 Difference]: Finished difference Result 110 states and 242 transitions. [2021-08-06 19:34:15,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:34:15,258 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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 15 [2021-08-06 19:34:15,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:15,259 INFO L225 Difference]: With dead ends: 110 [2021-08-06 19:34:15,259 INFO L226 Difference]: Without dead ends: 110 [2021-08-06 19:34:15,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:34:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-06 19:34:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2021-08-06 19:34:15,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.326530612244898) internal successors, (228), 98 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 228 transitions. [2021-08-06 19:34:15,261 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 228 transitions. Word has length 15 [2021-08-06 19:34:15,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:15,261 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 228 transitions. [2021-08-06 19:34:15,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 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) [2021-08-06 19:34:15,261 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 228 transitions. [2021-08-06 19:34:15,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:15,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:15,261 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:15,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 19:34:15,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:15,478 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:15,479 INFO L82 PathProgramCache]: Analyzing trace with hash -220354515, now seen corresponding path program 30 times [2021-08-06 19:34:15,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:15,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214234064] [2021-08-06 19:34:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:15,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:15,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:15,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214234064] [2021-08-06 19:34:15,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214234064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:15,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892908625] [2021-08-06 19:34:15,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:15,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:15,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:15,533 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:15,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 19:34:15,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:34:15,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:15,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:15,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:15,833 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:15,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:15,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892908625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:15,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:15,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 19:34:15,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215756008] [2021-08-06 19:34:15,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:34:15,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:15,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:34:15,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:34:15,853 INFO L87 Difference]: Start difference. First operand 99 states and 228 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-08-06 19:34:15,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:15,912 INFO L93 Difference]: Finished difference Result 109 states and 240 transitions. [2021-08-06 19:34:15,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:34:15,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 15 [2021-08-06 19:34:15,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:15,913 INFO L225 Difference]: With dead ends: 109 [2021-08-06 19:34:15,913 INFO L226 Difference]: Without dead ends: 109 [2021-08-06 19:34:15,913 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:34:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-06 19:34:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-08-06 19:34:15,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.326530612244898) internal successors, (228), 98 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 228 transitions. [2021-08-06 19:34:15,915 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 228 transitions. Word has length 15 [2021-08-06 19:34:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:15,915 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 228 transitions. [2021-08-06 19:34:15,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-08-06 19:34:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 228 transitions. [2021-08-06 19:34:15,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:34:15,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:15,915 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:15,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:16,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:16,130 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:16,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:16,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1820792369, now seen corresponding path program 31 times [2021-08-06 19:34:16,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:16,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786047429] [2021-08-06 19:34:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:16,130 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:16,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:16,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786047429] [2021-08-06 19:34:16,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786047429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:16,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237418030] [2021-08-06 19:34:16,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:16,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:16,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:16,171 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:16,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 19:34:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:16,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:34:16,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:16,455 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:16,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:16,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237418030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:16,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:16,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-06 19:34:16,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006909400] [2021-08-06 19:34:16,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:34:16,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:16,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:34:16,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:34:16,483 INFO L87 Difference]: Start difference. First operand 99 states and 228 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-08-06 19:34:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:16,542 INFO L93 Difference]: Finished difference Result 118 states and 266 transitions. [2021-08-06 19:34:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:34:16,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 15 [2021-08-06 19:34:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:16,543 INFO L225 Difference]: With dead ends: 118 [2021-08-06 19:34:16,543 INFO L226 Difference]: Without dead ends: 118 [2021-08-06 19:34:16,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:34:16,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-06 19:34:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 107. [2021-08-06 19:34:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.30188679245283) internal successors, (244), 106 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 244 transitions. [2021-08-06 19:34:16,546 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 244 transitions. Word has length 15 [2021-08-06 19:34:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:16,546 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 244 transitions. [2021-08-06 19:34:16,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-08-06 19:34:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 244 transitions. [2021-08-06 19:34:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:34:16,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:16,546 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:16,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:16,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-06 19:34:16,761 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:16,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:16,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1794994228, now seen corresponding path program 32 times [2021-08-06 19:34:16,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:16,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676106672] [2021-08-06 19:34:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:16,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:16,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:16,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676106672] [2021-08-06 19:34:16,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676106672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:16,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750245831] [2021-08-06 19:34:16,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:16,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:16,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:16,861 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:16,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 19:34:17,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:17,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:17,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:34:17,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:17,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:17,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 117 [2021-08-06 19:34:17,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:17,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750245831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:17,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:17,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:34:17,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866804881] [2021-08-06 19:34:17,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:34:17,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:17,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:34:17,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:34:17,753 INFO L87 Difference]: Start difference. First operand 107 states and 244 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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) [2021-08-06 19:34:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:18,002 INFO L93 Difference]: Finished difference Result 145 states and 309 transitions. [2021-08-06 19:34:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:34:18,002 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-08-06 19:34:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:18,002 INFO L225 Difference]: With dead ends: 145 [2021-08-06 19:34:18,003 INFO L226 Difference]: Without dead ends: 129 [2021-08-06 19:34:18,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:34:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-06 19:34:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117. [2021-08-06 19:34:18,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.3275862068965516) internal successors, (270), 116 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 270 transitions. [2021-08-06 19:34:18,005 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 270 transitions. Word has length 16 [2021-08-06 19:34:18,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:18,005 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 270 transitions. [2021-08-06 19:34:18,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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) [2021-08-06 19:34:18,005 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 270 transitions. [2021-08-06 19:34:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:34:18,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:18,006 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:18,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:18,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 19:34:18,221 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:18,221 INFO L82 PathProgramCache]: Analyzing trace with hash 700045236, now seen corresponding path program 33 times [2021-08-06 19:34:18,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:18,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898127045] [2021-08-06 19:34:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:18,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:18,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:18,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898127045] [2021-08-06 19:34:18,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898127045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:18,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943718266] [2021-08-06 19:34:18,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:18,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:18,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:18,310 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:18,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 19:34:18,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:34:18,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:18,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:34:18,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:18,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:18,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 117 [2021-08-06 19:34:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:19,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943718266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:19,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:19,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 19:34:19,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881437941] [2021-08-06 19:34:19,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:34:19,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:19,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:34:19,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:34:19,025 INFO L87 Difference]: Start difference. First operand 117 states and 270 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-08-06 19:34:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:19,155 INFO L93 Difference]: Finished difference Result 157 states and 339 transitions. [2021-08-06 19:34:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:34:19,155 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-08-06 19:34:19,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:19,156 INFO L225 Difference]: With dead ends: 157 [2021-08-06 19:34:19,156 INFO L226 Difference]: Without dead ends: 146 [2021-08-06 19:34:19,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:34:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-06 19:34:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 128. [2021-08-06 19:34:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.37007874015748) internal successors, (301), 127 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 301 transitions. [2021-08-06 19:34:19,159 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 301 transitions. Word has length 16 [2021-08-06 19:34:19,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:19,159 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 301 transitions. [2021-08-06 19:34:19,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-08-06 19:34:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 301 transitions. [2021-08-06 19:34:19,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:34:19,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:19,160 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:19,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:19,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 19:34:19,373 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash 442558306, now seen corresponding path program 34 times [2021-08-06 19:34:19,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:19,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811828223] [2021-08-06 19:34:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:19,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:19,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:19,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811828223] [2021-08-06 19:34:19,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811828223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:19,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203193835] [2021-08-06 19:34:19,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:19,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:19,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:19,469 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:19,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 19:34:19,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:19,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:19,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:34:19,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:20,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:20,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 117 [2021-08-06 19:34:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:20,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203193835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:20,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:20,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 19:34:20,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939511853] [2021-08-06 19:34:20,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:34:20,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:20,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:34:20,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:34:20,291 INFO L87 Difference]: Start difference. First operand 128 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-08-06 19:34:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:20,486 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2021-08-06 19:34:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:34:20,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-08-06 19:34:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:20,487 INFO L225 Difference]: With dead ends: 169 [2021-08-06 19:34:20,487 INFO L226 Difference]: Without dead ends: 158 [2021-08-06 19:34:20,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 181.5ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:34:20,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-06 19:34:20,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 143. [2021-08-06 19:34:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.3943661971830985) internal successors, (340), 142 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 340 transitions. [2021-08-06 19:34:20,490 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 340 transitions. Word has length 16 [2021-08-06 19:34:20,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:20,490 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 340 transitions. [2021-08-06 19:34:20,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-08-06 19:34:20,490 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 340 transitions. [2021-08-06 19:34:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:34:20,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:20,490 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:20,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:20,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:20,693 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:20,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1279108600, now seen corresponding path program 35 times [2021-08-06 19:34:20,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:20,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168125044] [2021-08-06 19:34:20,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:20,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:20,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:20,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168125044] [2021-08-06 19:34:20,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168125044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:20,768 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296042241] [2021-08-06 19:34:20,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:20,769 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:20,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:20,769 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:20,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 19:34:21,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:34:21,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:21,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:34:21,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:21,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:21,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 117 [2021-08-06 19:34:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:21,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296042241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:21,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:21,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-06 19:34:21,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58136981] [2021-08-06 19:34:21,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:34:21,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:21,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:34:21,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:34:21,610 INFO L87 Difference]: Start difference. First operand 143 states and 340 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:21,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:21,768 INFO L93 Difference]: Finished difference Result 158 states and 357 transitions. [2021-08-06 19:34:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:34:21,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:34:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:21,769 INFO L225 Difference]: With dead ends: 158 [2021-08-06 19:34:21,769 INFO L226 Difference]: Without dead ends: 146 [2021-08-06 19:34:21,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:34:21,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-06 19:34:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2021-08-06 19:34:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.387323943661972) internal successors, (339), 142 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) [2021-08-06 19:34:21,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 339 transitions. [2021-08-06 19:34:21,772 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 339 transitions. Word has length 16 [2021-08-06 19:34:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:21,772 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 339 transitions. [2021-08-06 19:34:21,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 339 transitions. [2021-08-06 19:34:21,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:34:21,772 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:21,772 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:21,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-06 19:34:21,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 19:34:21,989 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:21,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:21,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1050398068, now seen corresponding path program 36 times [2021-08-06 19:34:21,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:21,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355290063] [2021-08-06 19:34:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:21,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:22,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:22,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355290063] [2021-08-06 19:34:22,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355290063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:22,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507943567] [2021-08-06 19:34:22,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:22,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:22,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:22,082 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:22,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 19:34:22,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:34:22,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:22,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:34:22,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:22,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:22,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 117 [2021-08-06 19:34:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:22,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507943567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:22,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:22,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 19:34:22,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639318651] [2021-08-06 19:34:22,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:34:22,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:22,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:34:22,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:34:22,976 INFO L87 Difference]: Start difference. First operand 143 states and 339 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-08-06 19:34:23,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:23,148 INFO L93 Difference]: Finished difference Result 193 states and 437 transitions. [2021-08-06 19:34:23,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:34:23,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-08-06 19:34:23,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:23,149 INFO L225 Difference]: With dead ends: 193 [2021-08-06 19:34:23,149 INFO L226 Difference]: Without dead ends: 181 [2021-08-06 19:34:23,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:34:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-06 19:34:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 164. [2021-08-06 19:34:23,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.4049079754601226) internal successors, (392), 163 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 392 transitions. [2021-08-06 19:34:23,152 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 392 transitions. Word has length 16 [2021-08-06 19:34:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:23,152 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 392 transitions. [2021-08-06 19:34:23,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-08-06 19:34:23,153 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 392 transitions. [2021-08-06 19:34:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:34:23,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:23,153 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:23,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:23,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 19:34:23,369 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash 247742596, now seen corresponding path program 37 times [2021-08-06 19:34:23,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:23,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310271527] [2021-08-06 19:34:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:23,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:23,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:23,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310271527] [2021-08-06 19:34:23,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310271527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:23,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287681393] [2021-08-06 19:34:23,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:23,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:23,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:23,465 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:23,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 19:34:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:23,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:34:23,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:24,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:24,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 117 [2021-08-06 19:34:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:24,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287681393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:24,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:24,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 19:34:24,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574092791] [2021-08-06 19:34:24,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:34:24,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:24,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:34:24,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:34:24,208 INFO L87 Difference]: Start difference. First operand 164 states and 392 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-08-06 19:34:24,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:24,377 INFO L93 Difference]: Finished difference Result 183 states and 416 transitions. [2021-08-06 19:34:24,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:34:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-08-06 19:34:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:24,378 INFO L225 Difference]: With dead ends: 183 [2021-08-06 19:34:24,378 INFO L226 Difference]: Without dead ends: 171 [2021-08-06 19:34:24,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:34:24,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-06 19:34:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 164. [2021-08-06 19:34:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.3987730061349692) internal successors, (391), 163 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) [2021-08-06 19:34:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 391 transitions. [2021-08-06 19:34:24,381 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 391 transitions. Word has length 16 [2021-08-06 19:34:24,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:24,381 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 391 transitions. [2021-08-06 19:34:24,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-08-06 19:34:24,381 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 391 transitions. [2021-08-06 19:34:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:34:24,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:24,382 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:24,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:24,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:24,599 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:24,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:24,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1581405790, now seen corresponding path program 38 times [2021-08-06 19:34:24,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:24,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127031083] [2021-08-06 19:34:24,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:24,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:24,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:24,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127031083] [2021-08-06 19:34:24,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127031083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:24,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509422563] [2021-08-06 19:34:24,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:24,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:24,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:24,689 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:24,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 19:34:25,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:25,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:34:25,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:25,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:25,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 117 [2021-08-06 19:34:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:25,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509422563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:25,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:25,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 19:34:25,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018043466] [2021-08-06 19:34:25,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:34:25,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:25,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:34:25,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:34:25,533 INFO L87 Difference]: Start difference. First operand 164 states and 391 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-08-06 19:34:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:25,736 INFO L93 Difference]: Finished difference Result 213 states and 485 transitions. [2021-08-06 19:34:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:34:25,736 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-08-06 19:34:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:25,737 INFO L225 Difference]: With dead ends: 213 [2021-08-06 19:34:25,737 INFO L226 Difference]: Without dead ends: 202 [2021-08-06 19:34:25,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:34:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-06 19:34:25,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 190. [2021-08-06 19:34:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.3915343915343916) internal successors, (452), 189 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 452 transitions. [2021-08-06 19:34:25,741 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 452 transitions. Word has length 16 [2021-08-06 19:34:25,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:25,741 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 452 transitions. [2021-08-06 19:34:25,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-08-06 19:34:25,741 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 452 transitions. [2021-08-06 19:34:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:34:25,741 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:25,741 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:25,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:25,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 19:34:25,957 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:25,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1659832456, now seen corresponding path program 39 times [2021-08-06 19:34:25,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:25,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521686205] [2021-08-06 19:34:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:25,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:26,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:26,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521686205] [2021-08-06 19:34:26,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521686205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:26,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814739259] [2021-08-06 19:34:26,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:26,048 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:26,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:26,049 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:26,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 19:34:26,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:34:26,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:26,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:34:26,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:26,734 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:26,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 117 [2021-08-06 19:34:26,844 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 70.0 percent of original size [2021-08-06 19:34:26,854 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 70.0 percent of original size [2021-08-06 19:34:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:26,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814739259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:26,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:26,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:34:26,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436601256] [2021-08-06 19:34:26,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:34:26,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:26,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:34:26,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:34:26,874 INFO L87 Difference]: Start difference. First operand 190 states and 452 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) 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) [2021-08-06 19:34:27,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:27,098 INFO L93 Difference]: Finished difference Result 214 states and 483 transitions. [2021-08-06 19:34:27,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:34:27,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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 16 [2021-08-06 19:34:27,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:27,099 INFO L225 Difference]: With dead ends: 214 [2021-08-06 19:34:27,099 INFO L226 Difference]: Without dead ends: 202 [2021-08-06 19:34:27,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:34:27,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-06 19:34:27,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 190. [2021-08-06 19:34:27,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.386243386243386) internal successors, (451), 189 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 451 transitions. [2021-08-06 19:34:27,102 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 451 transitions. Word has length 16 [2021-08-06 19:34:27,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:27,103 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 451 transitions. [2021-08-06 19:34:27,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) 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) [2021-08-06 19:34:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 451 transitions. [2021-08-06 19:34:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-06 19:34:27,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:27,103 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:27,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:27,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:27,317 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:27,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1562946764, now seen corresponding path program 40 times [2021-08-06 19:34:27,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:27,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468558592] [2021-08-06 19:34:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:27,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:27,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:27,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468558592] [2021-08-06 19:34:27,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468558592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:27,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86127557] [2021-08-06 19:34:27,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:27,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:27,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:27,401 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:27,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 19:34:27,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:27,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:27,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 19:34:27,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:28,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:28,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 117 [2021-08-06 19:34:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:28,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86127557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:28,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:28,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 19:34:28,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175286590] [2021-08-06 19:34:28,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:34:28,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:28,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:34:28,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:34:28,332 INFO L87 Difference]: Start difference. First operand 190 states and 451 transitions. Second operand has 18 states, 18 states have (on average 1.5) 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) [2021-08-06 19:34:28,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:28,517 INFO L93 Difference]: Finished difference Result 235 states and 538 transitions. [2021-08-06 19:34:28,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:34:28,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) 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 16 [2021-08-06 19:34:28,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:28,518 INFO L225 Difference]: With dead ends: 235 [2021-08-06 19:34:28,518 INFO L226 Difference]: Without dead ends: 225 [2021-08-06 19:34:28,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:34:28,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-06 19:34:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 217. [2021-08-06 19:34:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.384259259259259) internal successors, (515), 216 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:28,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 515 transitions. [2021-08-06 19:34:28,523 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 515 transitions. Word has length 16 [2021-08-06 19:34:28,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:28,523 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 515 transitions. [2021-08-06 19:34:28,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) 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) [2021-08-06 19:34:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 515 transitions. [2021-08-06 19:34:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:28,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:28,524 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:28,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 19:34:28,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:28,737 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:28,737 INFO L82 PathProgramCache]: Analyzing trace with hash 626043585, now seen corresponding path program 41 times [2021-08-06 19:34:28,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:28,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770335798] [2021-08-06 19:34:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:28,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:28,836 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:28,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:28,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770335798] [2021-08-06 19:34:28,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770335798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:28,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081643269] [2021-08-06 19:34:28,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:28,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:28,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:28,837 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:28,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 19:34:29,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:34:29,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:29,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:34:29,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:29,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:29,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 117 [2021-08-06 19:34:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:29,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081643269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:29,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:29,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:34:29,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117521318] [2021-08-06 19:34:29,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:34:29,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:29,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:34:29,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:34:29,780 INFO L87 Difference]: Start difference. First operand 217 states and 515 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:30,035 INFO L93 Difference]: Finished difference Result 246 states and 564 transitions. [2021-08-06 19:34:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:34:30,035 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:30,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:30,036 INFO L225 Difference]: With dead ends: 246 [2021-08-06 19:34:30,036 INFO L226 Difference]: Without dead ends: 240 [2021-08-06 19:34:30,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:34:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-08-06 19:34:30,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 220. [2021-08-06 19:34:30,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.3789954337899544) internal successors, (521), 219 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) [2021-08-06 19:34:30,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 521 transitions. [2021-08-06 19:34:30,040 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 521 transitions. Word has length 17 [2021-08-06 19:34:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:30,040 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 521 transitions. [2021-08-06 19:34:30,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 521 transitions. [2021-08-06 19:34:30,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:30,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:30,041 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:30,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:30,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-06 19:34:30,245 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash -726392337, now seen corresponding path program 42 times [2021-08-06 19:34:30,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:30,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249906763] [2021-08-06 19:34:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:30,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:30,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:30,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249906763] [2021-08-06 19:34:30,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249906763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:30,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732636640] [2021-08-06 19:34:30,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:30,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:30,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:30,338 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:30,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 19:34:30,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:34:30,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:30,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:34:30,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:31,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:31,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 117 [2021-08-06 19:34:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:31,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732636640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:31,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:31,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 19:34:31,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92470326] [2021-08-06 19:34:31,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:34:31,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:31,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:34:31,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:34:31,310 INFO L87 Difference]: Start difference. First operand 220 states and 521 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:31,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:31,472 INFO L93 Difference]: Finished difference Result 250 states and 567 transitions. [2021-08-06 19:34:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:34:31,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:31,473 INFO L225 Difference]: With dead ends: 250 [2021-08-06 19:34:31,473 INFO L226 Difference]: Without dead ends: 245 [2021-08-06 19:34:31,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:34:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-06 19:34:31,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 222. [2021-08-06 19:34:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3800904977375565) internal successors, (526), 221 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 526 transitions. [2021-08-06 19:34:31,476 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 526 transitions. Word has length 17 [2021-08-06 19:34:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:31,477 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 526 transitions. [2021-08-06 19:34:31,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 526 transitions. [2021-08-06 19:34:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:31,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:31,477 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:31,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:31,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 19:34:31,694 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:31,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:31,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1016417998, now seen corresponding path program 43 times [2021-08-06 19:34:31,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:31,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202161641] [2021-08-06 19:34:31,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:31,695 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:31,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:31,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202161641] [2021-08-06 19:34:31,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202161641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:31,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249034992] [2021-08-06 19:34:31,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:31,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:31,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:31,738 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:31,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 19:34:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:32,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:34:32,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:32,225 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:32,226 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:32,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249034992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:32,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:32,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:34:32,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086681314] [2021-08-06 19:34:32,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:34:32,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:32,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:34:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:34:32,246 INFO L87 Difference]: Start difference. First operand 222 states and 526 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:34:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:32,282 INFO L93 Difference]: Finished difference Result 287 states and 607 transitions. [2021-08-06 19:34:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:34:32,282 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 17 [2021-08-06 19:34:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:32,283 INFO L225 Difference]: With dead ends: 287 [2021-08-06 19:34:32,283 INFO L226 Difference]: Without dead ends: 287 [2021-08-06 19:34:32,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:34:32,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-06 19:34:32,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 228. [2021-08-06 19:34:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.392070484581498) internal successors, (543), 227 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 543 transitions. [2021-08-06 19:34:32,287 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 543 transitions. Word has length 17 [2021-08-06 19:34:32,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:32,287 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 543 transitions. [2021-08-06 19:34:32,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:34:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 543 transitions. [2021-08-06 19:34:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:32,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:32,288 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:32,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:32,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 19:34:32,504 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:32,505 INFO L82 PathProgramCache]: Analyzing trace with hash -118552575, now seen corresponding path program 44 times [2021-08-06 19:34:32,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:32,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70860738] [2021-08-06 19:34:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:32,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:32,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:32,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70860738] [2021-08-06 19:34:32,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70860738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:32,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834460108] [2021-08-06 19:34:32,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:32,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:32,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:32,585 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:32,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 19:34:33,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:33,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:33,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:34:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:33,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:33,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 117 [2021-08-06 19:34:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:33,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834460108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:33,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:33,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 19:34:33,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152789303] [2021-08-06 19:34:33,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:34:33,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:33,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:34:33,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:34:33,625 INFO L87 Difference]: Start difference. First operand 228 states and 543 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:33,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:33,811 INFO L93 Difference]: Finished difference Result 255 states and 588 transitions. [2021-08-06 19:34:33,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:34:33,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:33,812 INFO L225 Difference]: With dead ends: 255 [2021-08-06 19:34:33,812 INFO L226 Difference]: Without dead ends: 251 [2021-08-06 19:34:33,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:34:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-06 19:34:33,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 230. [2021-08-06 19:34:33,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.3973799126637556) internal successors, (549), 229 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:33,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 549 transitions. [2021-08-06 19:34:33,816 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 549 transitions. Word has length 17 [2021-08-06 19:34:33,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:33,816 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 549 transitions. [2021-08-06 19:34:33,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:33,816 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 549 transitions. [2021-08-06 19:34:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:33,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:33,817 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:33,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-06 19:34:34,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:34,018 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:34,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1926007038, now seen corresponding path program 45 times [2021-08-06 19:34:34,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:34,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468398248] [2021-08-06 19:34:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:34,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:34,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:34,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:34,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468398248] [2021-08-06 19:34:34,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468398248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:34,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563282925] [2021-08-06 19:34:34,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:34,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:34,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:34,063 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:34,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 19:34:34,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:34:34,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:34,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:34:34,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:34,587 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:34,588 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:34,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563282925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:34,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:34,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:34:34,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500459212] [2021-08-06 19:34:34,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:34:34,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:34,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:34:34,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:34:34,608 INFO L87 Difference]: Start difference. First operand 230 states and 549 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:34,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:34,664 INFO L93 Difference]: Finished difference Result 309 states and 653 transitions. [2021-08-06 19:34:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:34:34,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:34,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:34,665 INFO L225 Difference]: With dead ends: 309 [2021-08-06 19:34:34,665 INFO L226 Difference]: Without dead ends: 309 [2021-08-06 19:34:34,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:34,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-08-06 19:34:34,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 228. [2021-08-06 19:34:34,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.392070484581498) internal successors, (543), 227 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:34,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 543 transitions. [2021-08-06 19:34:34,669 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 543 transitions. Word has length 17 [2021-08-06 19:34:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:34,669 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 543 transitions. [2021-08-06 19:34:34,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:34,669 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 543 transitions. [2021-08-06 19:34:34,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:34,669 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:34,669 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:34,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:34,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-06 19:34:34,885 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:34,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:34,885 INFO L82 PathProgramCache]: Analyzing trace with hash -921208047, now seen corresponding path program 46 times [2021-08-06 19:34:34,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:34,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923981353] [2021-08-06 19:34:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:34,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:34,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:34,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923981353] [2021-08-06 19:34:34,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923981353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:34,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983033147] [2021-08-06 19:34:34,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:34,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:34,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:34,964 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:34,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 19:34:35,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:35,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:34:35,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:35,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:35,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 117 [2021-08-06 19:34:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:35,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983033147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:35,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:35,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-06 19:34:35,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499834451] [2021-08-06 19:34:35,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 19:34:35,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:35,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 19:34:35,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:34:35,916 INFO L87 Difference]: Start difference. First operand 228 states and 543 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:36,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:36,090 INFO L93 Difference]: Finished difference Result 251 states and 577 transitions. [2021-08-06 19:34:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:34:36,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:36,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:36,092 INFO L225 Difference]: With dead ends: 251 [2021-08-06 19:34:36,092 INFO L226 Difference]: Without dead ends: 237 [2021-08-06 19:34:36,092 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:34:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-08-06 19:34:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2021-08-06 19:34:36,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.3903508771929824) internal successors, (545), 228 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) [2021-08-06 19:34:36,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 545 transitions. [2021-08-06 19:34:36,095 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 545 transitions. Word has length 17 [2021-08-06 19:34:36,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:36,095 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 545 transitions. [2021-08-06 19:34:36,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 545 transitions. [2021-08-06 19:34:36,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:36,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:36,096 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:36,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:36,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 19:34:36,307 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:36,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1544610863, now seen corresponding path program 47 times [2021-08-06 19:34:36,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:36,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653955131] [2021-08-06 19:34:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:36,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:36,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:36,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653955131] [2021-08-06 19:34:36,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653955131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:36,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039816051] [2021-08-06 19:34:36,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:36,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:36,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:36,398 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:36,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 19:34:36,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:34:36,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:36,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:34:36,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:37,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:37,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 117 [2021-08-06 19:34:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:37,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039816051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:37,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:37,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 19:34:37,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300344076] [2021-08-06 19:34:37,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:34:37,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:37,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:34:37,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:34:37,598 INFO L87 Difference]: Start difference. First operand 229 states and 545 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:37,789 INFO L93 Difference]: Finished difference Result 248 states and 574 transitions. [2021-08-06 19:34:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:34:37,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:37,790 INFO L225 Difference]: With dead ends: 248 [2021-08-06 19:34:37,790 INFO L226 Difference]: Without dead ends: 243 [2021-08-06 19:34:37,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:34:37,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-08-06 19:34:37,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2021-08-06 19:34:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.3876651982378854) internal successors, (542), 227 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 542 transitions. [2021-08-06 19:34:37,794 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 542 transitions. Word has length 17 [2021-08-06 19:34:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:37,794 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 542 transitions. [2021-08-06 19:34:37,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 542 transitions. [2021-08-06 19:34:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:37,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:37,794 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:37,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 19:34:38,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:38,009 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:38,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:38,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1007546098, now seen corresponding path program 48 times [2021-08-06 19:34:38,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:38,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209038042] [2021-08-06 19:34:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:38,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:38,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:38,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:38,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209038042] [2021-08-06 19:34:38,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209038042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:38,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759870039] [2021-08-06 19:34:38,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:38,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:38,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:38,058 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:38,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 19:34:38,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:34:38,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:38,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:34:38,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:38,608 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:38,609 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:38,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759870039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:38,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:38,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:34:38,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805018204] [2021-08-06 19:34:38,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:34:38,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:38,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:34:38,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:34:38,629 INFO L87 Difference]: Start difference. First operand 228 states and 542 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:34:38,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:38,668 INFO L93 Difference]: Finished difference Result 287 states and 621 transitions. [2021-08-06 19:34:38,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:34:38,669 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 17 [2021-08-06 19:34:38,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:38,670 INFO L225 Difference]: With dead ends: 287 [2021-08-06 19:34:38,670 INFO L226 Difference]: Without dead ends: 287 [2021-08-06 19:34:38,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:34:38,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-06 19:34:38,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 240. [2021-08-06 19:34:38,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.3807531380753137) internal successors, (569), 239 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:38,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 569 transitions. [2021-08-06 19:34:38,674 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 569 transitions. Word has length 17 [2021-08-06 19:34:38,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:38,674 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 569 transitions. [2021-08-06 19:34:38,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:34:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 569 transitions. [2021-08-06 19:34:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:38,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:38,674 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:38,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 19:34:38,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-06 19:34:38,889 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash -262843600, now seen corresponding path program 49 times [2021-08-06 19:34:38,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:38,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549033606] [2021-08-06 19:34:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:38,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:38,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:38,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549033606] [2021-08-06 19:34:38,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549033606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:38,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934446756] [2021-08-06 19:34:38,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:38,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:38,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:38,936 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:38,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 19:34:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:39,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:34:39,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:39,507 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:39,508 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:39,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934446756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:39,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:39,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:34:39,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260262859] [2021-08-06 19:34:39,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:34:39,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:39,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:34:39,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:34:39,528 INFO L87 Difference]: Start difference. First operand 240 states and 569 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:39,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:39,581 INFO L93 Difference]: Finished difference Result 302 states and 644 transitions. [2021-08-06 19:34:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:34:39,581 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:39,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:39,582 INFO L225 Difference]: With dead ends: 302 [2021-08-06 19:34:39,582 INFO L226 Difference]: Without dead ends: 302 [2021-08-06 19:34:39,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:39,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-08-06 19:34:39,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 242. [2021-08-06 19:34:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.3775933609958506) internal successors, (573), 241 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 573 transitions. [2021-08-06 19:34:39,586 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 573 transitions. Word has length 17 [2021-08-06 19:34:39,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:39,586 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 573 transitions. [2021-08-06 19:34:39,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:39,586 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 573 transitions. [2021-08-06 19:34:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:39,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:39,587 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:39,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:39,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:39,801 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:39,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1348097358, now seen corresponding path program 50 times [2021-08-06 19:34:39,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:39,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473600191] [2021-08-06 19:34:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:39,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:39,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:39,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473600191] [2021-08-06 19:34:39,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473600191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:39,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383808219] [2021-08-06 19:34:39,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:39,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:39,885 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:39,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 19:34:40,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:40,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:40,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:34:40,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:40,457 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:40,458 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:40,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383808219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:40,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:40,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:34:40,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817951535] [2021-08-06 19:34:40,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:34:40,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:40,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:34:40,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:34:40,478 INFO L87 Difference]: Start difference. First operand 242 states and 573 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:40,554 INFO L93 Difference]: Finished difference Result 362 states and 814 transitions. [2021-08-06 19:34:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:34:40,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:40,556 INFO L225 Difference]: With dead ends: 362 [2021-08-06 19:34:40,556 INFO L226 Difference]: Without dead ends: 362 [2021-08-06 19:34:40,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:34:40,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-06 19:34:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 317. [2021-08-06 19:34:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.3702531645569622) internal successors, (749), 316 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 749 transitions. [2021-08-06 19:34:40,561 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 749 transitions. Word has length 17 [2021-08-06 19:34:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:40,561 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 749 transitions. [2021-08-06 19:34:40,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 749 transitions. [2021-08-06 19:34:40,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:40,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:40,562 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:40,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:40,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-06 19:34:40,771 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:40,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:40,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1466184197, now seen corresponding path program 51 times [2021-08-06 19:34:40,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:40,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151918068] [2021-08-06 19:34:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:40,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:40,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:40,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151918068] [2021-08-06 19:34:40,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151918068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:40,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135315235] [2021-08-06 19:34:40,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:40,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:40,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:40,858 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:40,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 19:34:41,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:34:41,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:41,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:34:41,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:41,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:41,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 117 [2021-08-06 19:34:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:41,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135315235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:41,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:41,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 19:34:41,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133974816] [2021-08-06 19:34:41,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:34:41,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:41,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:34:41,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:34:41,897 INFO L87 Difference]: Start difference. First operand 317 states and 749 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:42,146 INFO L93 Difference]: Finished difference Result 345 states and 793 transitions. [2021-08-06 19:34:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:34:42,147 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:42,148 INFO L225 Difference]: With dead ends: 345 [2021-08-06 19:34:42,148 INFO L226 Difference]: Without dead ends: 337 [2021-08-06 19:34:42,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:34:42,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-08-06 19:34:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 317. [2021-08-06 19:34:42,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.3702531645569622) internal successors, (749), 316 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 749 transitions. [2021-08-06 19:34:42,152 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 749 transitions. Word has length 17 [2021-08-06 19:34:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:42,152 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 749 transitions. [2021-08-06 19:34:42,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 749 transitions. [2021-08-06 19:34:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:42,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:42,153 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:42,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:42,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 19:34:42,353 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:42,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:42,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1563069889, now seen corresponding path program 52 times [2021-08-06 19:34:42,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:42,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569513284] [2021-08-06 19:34:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:42,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:42,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:42,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569513284] [2021-08-06 19:34:42,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569513284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:42,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476006365] [2021-08-06 19:34:42,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:42,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:42,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:42,448 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:42,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 19:34:42,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:42,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:42,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:34:42,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:43,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:43,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 117 [2021-08-06 19:34:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:43,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476006365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:43,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:43,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 19:34:43,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613609479] [2021-08-06 19:34:43,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:34:43,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:43,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:34:43,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:34:43,614 INFO L87 Difference]: Start difference. First operand 317 states and 749 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:43,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:43,803 INFO L93 Difference]: Finished difference Result 334 states and 777 transitions. [2021-08-06 19:34:43,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:34:43,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:43,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:43,805 INFO L225 Difference]: With dead ends: 334 [2021-08-06 19:34:43,805 INFO L226 Difference]: Without dead ends: 330 [2021-08-06 19:34:43,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:34:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-08-06 19:34:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 317. [2021-08-06 19:34:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.3702531645569622) internal successors, (749), 316 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 749 transitions. [2021-08-06 19:34:43,809 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 749 transitions. Word has length 17 [2021-08-06 19:34:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:43,809 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 749 transitions. [2021-08-06 19:34:43,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 749 transitions. [2021-08-06 19:34:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:43,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:43,810 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:43,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-06 19:34:44,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:44,020 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:44,020 INFO L82 PathProgramCache]: Analyzing trace with hash -244384574, now seen corresponding path program 53 times [2021-08-06 19:34:44,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:44,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756721292] [2021-08-06 19:34:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:44,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:44,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:44,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:44,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756721292] [2021-08-06 19:34:44,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756721292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:44,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793979926] [2021-08-06 19:34:44,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:44,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:44,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:44,066 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:44,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 19:34:44,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:34:44,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:44,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:34:44,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:44,681 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:44,682 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:44,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793979926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:44,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:44,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:34:44,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952054081] [2021-08-06 19:34:44,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:34:44,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:34:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:34:44,702 INFO L87 Difference]: Start difference. First operand 317 states and 749 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:44,747 INFO L93 Difference]: Finished difference Result 362 states and 792 transitions. [2021-08-06 19:34:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:34:44,748 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:44,749 INFO L225 Difference]: With dead ends: 362 [2021-08-06 19:34:44,749 INFO L226 Difference]: Without dead ends: 362 [2021-08-06 19:34:44,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:34:44,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-08-06 19:34:44,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 305. [2021-08-06 19:34:44,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.3552631578947367) internal successors, (716), 304 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 716 transitions. [2021-08-06 19:34:44,766 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 716 transitions. Word has length 17 [2021-08-06 19:34:44,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:44,766 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 716 transitions. [2021-08-06 19:34:44,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:44,766 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 716 transitions. [2021-08-06 19:34:44,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:44,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:44,767 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:44,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:44,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:44,978 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:44,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:44,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1366556384, now seen corresponding path program 54 times [2021-08-06 19:34:44,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:44,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985139762] [2021-08-06 19:34:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:44,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:45,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:45,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985139762] [2021-08-06 19:34:45,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985139762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:45,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910287482] [2021-08-06 19:34:45,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:45,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:45,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:45,026 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:45,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 19:34:45,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:34:45,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:45,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:34:45,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:45,671 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:45,671 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:45,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910287482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:45,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:45,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 19:34:45,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103088924] [2021-08-06 19:34:45,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:34:45,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:34:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:34:45,692 INFO L87 Difference]: Start difference. First operand 305 states and 716 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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) [2021-08-06 19:34:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:45,773 INFO L93 Difference]: Finished difference Result 372 states and 804 transitions. [2021-08-06 19:34:45,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:34:45,774 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-08-06 19:34:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:45,775 INFO L225 Difference]: With dead ends: 372 [2021-08-06 19:34:45,775 INFO L226 Difference]: Without dead ends: 372 [2021-08-06 19:34:45,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:34:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-08-06 19:34:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 239. [2021-08-06 19:34:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.3781512605042017) internal successors, (566), 238 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 566 transitions. [2021-08-06 19:34:45,779 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 566 transitions. Word has length 17 [2021-08-06 19:34:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:45,779 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 566 transitions. [2021-08-06 19:34:45,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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) [2021-08-06 19:34:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 566 transitions. [2021-08-06 19:34:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:45,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:45,779 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:45,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 19:34:45,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:45,993 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:45,993 INFO L82 PathProgramCache]: Analyzing trace with hash -233881470, now seen corresponding path program 55 times [2021-08-06 19:34:45,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:45,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561048850] [2021-08-06 19:34:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:45,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:46,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:46,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561048850] [2021-08-06 19:34:46,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561048850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:46,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508453779] [2021-08-06 19:34:46,042 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:46,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:46,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:46,042 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:46,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 19:34:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:46,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:34:46,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:46,673 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:46,673 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:46,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508453779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:46,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:46,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 19:34:46,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567333180] [2021-08-06 19:34:46,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:34:46,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:46,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:34:46,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:34:46,694 INFO L87 Difference]: Start difference. First operand 239 states and 566 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) 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) [2021-08-06 19:34:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:46,788 INFO L93 Difference]: Finished difference Result 311 states and 704 transitions. [2021-08-06 19:34:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:34:46,788 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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 17 [2021-08-06 19:34:46,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:46,789 INFO L225 Difference]: With dead ends: 311 [2021-08-06 19:34:46,789 INFO L226 Difference]: Without dead ends: 311 [2021-08-06 19:34:46,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:34:46,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-08-06 19:34:46,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 276. [2021-08-06 19:34:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.3636363636363638) internal successors, (650), 275 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:46,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 650 transitions. [2021-08-06 19:34:46,793 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 650 transitions. Word has length 17 [2021-08-06 19:34:46,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:46,793 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 650 transitions. [2021-08-06 19:34:46,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) 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) [2021-08-06 19:34:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 650 transitions. [2021-08-06 19:34:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:46,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:46,794 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:46,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:47,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-06 19:34:47,005 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:47,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:47,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1834067567, now seen corresponding path program 56 times [2021-08-06 19:34:47,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:47,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407538698] [2021-08-06 19:34:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:47,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:47,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:47,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407538698] [2021-08-06 19:34:47,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407538698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:47,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484202952] [2021-08-06 19:34:47,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:47,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:47,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:47,099 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:47,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 19:34:47,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:47,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:47,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:34:47,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:47,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:47,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 117 [2021-08-06 19:34:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:48,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484202952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:48,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:48,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 19:34:48,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132378293] [2021-08-06 19:34:48,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 19:34:48,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 19:34:48,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:34:48,254 INFO L87 Difference]: Start difference. First operand 276 states and 650 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:48,509 INFO L93 Difference]: Finished difference Result 311 states and 708 transitions. [2021-08-06 19:34:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:34:48,509 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:48,510 INFO L225 Difference]: With dead ends: 311 [2021-08-06 19:34:48,510 INFO L226 Difference]: Without dead ends: 303 [2021-08-06 19:34:48,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:34:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-08-06 19:34:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 279. [2021-08-06 19:34:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.370503597122302) internal successors, (659), 278 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 659 transitions. [2021-08-06 19:34:48,514 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 659 transitions. Word has length 17 [2021-08-06 19:34:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:48,514 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 659 transitions. [2021-08-06 19:34:48,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 659 transitions. [2021-08-06 19:34:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:48,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:48,515 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:48,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:48,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 19:34:48,733 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:48,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:48,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2135299695, now seen corresponding path program 57 times [2021-08-06 19:34:48,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:48,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121556561] [2021-08-06 19:34:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:48,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:48,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:48,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121556561] [2021-08-06 19:34:48,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121556561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:48,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763798026] [2021-08-06 19:34:48,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:48,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:48,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:48,825 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:48,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 19:34:49,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:34:49,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:49,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 19:34:49,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:49,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:34:49,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 117 [2021-08-06 19:34:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:49,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763798026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:49,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:49,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-08-06 19:34:49,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512011309] [2021-08-06 19:34:49,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 19:34:49,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:49,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 19:34:49,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:34:49,923 INFO L87 Difference]: Start difference. First operand 279 states and 659 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:50,100 INFO L93 Difference]: Finished difference Result 297 states and 690 transitions. [2021-08-06 19:34:50,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:34:50,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:50,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:50,102 INFO L225 Difference]: With dead ends: 297 [2021-08-06 19:34:50,102 INFO L226 Difference]: Without dead ends: 293 [2021-08-06 19:34:50,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:34:50,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-08-06 19:34:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 279. [2021-08-06 19:34:50,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.370503597122302) internal successors, (659), 278 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 659 transitions. [2021-08-06 19:34:50,106 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 659 transitions. Word has length 17 [2021-08-06 19:34:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:50,106 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 659 transitions. [2021-08-06 19:34:50,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 659 transitions. [2021-08-06 19:34:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:50,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:50,106 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:50,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:50,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:50,315 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:50,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:50,315 INFO L82 PathProgramCache]: Analyzing trace with hash -416857266, now seen corresponding path program 58 times [2021-08-06 19:34:50,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:50,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770784573] [2021-08-06 19:34:50,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:50,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:50,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:50,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770784573] [2021-08-06 19:34:50,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770784573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:50,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982399368] [2021-08-06 19:34:50,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:50,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:50,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:50,364 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:50,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 19:34:50,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:50,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:51,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:34:51,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:51,051 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:51,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:51,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982399368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:51,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:51,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:34:51,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267399623] [2021-08-06 19:34:51,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:34:51,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:51,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:34:51,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:34:51,071 INFO L87 Difference]: Start difference. First operand 279 states and 659 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:51,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:51,122 INFO L93 Difference]: Finished difference Result 361 states and 787 transitions. [2021-08-06 19:34:51,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:34:51,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:51,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:51,124 INFO L225 Difference]: With dead ends: 361 [2021-08-06 19:34:51,124 INFO L226 Difference]: Without dead ends: 361 [2021-08-06 19:34:51,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 41.0ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:34:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-08-06 19:34:51,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 311. [2021-08-06 19:34:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.358064516129032) internal successors, (731), 310 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 731 transitions. [2021-08-06 19:34:51,128 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 731 transitions. Word has length 17 [2021-08-06 19:34:51,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:51,128 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 731 transitions. [2021-08-06 19:34:51,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 731 transitions. [2021-08-06 19:34:51,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:51,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:51,129 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:51,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:51,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:51,345 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:51,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:51,345 INFO L82 PathProgramCache]: Analyzing trace with hash 327845232, now seen corresponding path program 59 times [2021-08-06 19:34:51,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:51,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371868805] [2021-08-06 19:34:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:51,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:51,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:51,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371868805] [2021-08-06 19:34:51,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371868805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:51,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599033232] [2021-08-06 19:34:51,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:51,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:51,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:51,409 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:51,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 19:34:52,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:34:52,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:52,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:34:52,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:52,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:52,114 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:52,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599033232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:52,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:52,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:34:52,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248807690] [2021-08-06 19:34:52,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:34:52,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:52,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:34:52,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:34:52,135 INFO L87 Difference]: Start difference. First operand 311 states and 731 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:52,193 INFO L93 Difference]: Finished difference Result 364 states and 791 transitions. [2021-08-06 19:34:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:34:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:52,194 INFO L225 Difference]: With dead ends: 364 [2021-08-06 19:34:52,194 INFO L226 Difference]: Without dead ends: 364 [2021-08-06 19:34:52,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:34:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-06 19:34:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 308. [2021-08-06 19:34:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.3550488599348536) internal successors, (723), 307 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:52,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 723 transitions. [2021-08-06 19:34:52,198 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 723 transitions. Word has length 17 [2021-08-06 19:34:52,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:52,199 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 723 transitions. [2021-08-06 19:34:52,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 723 transitions. [2021-08-06 19:34:52,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:52,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:52,199 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:52,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-06 19:34:52,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:52,405 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:52,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:52,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1938786190, now seen corresponding path program 60 times [2021-08-06 19:34:52,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:52,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141918210] [2021-08-06 19:34:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:52,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:52,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:52,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141918210] [2021-08-06 19:34:52,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141918210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:52,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681042120] [2021-08-06 19:34:52,451 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:52,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:52,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:52,452 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:52,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 19:34:53,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:34:53,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:53,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:34:53,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:53,128 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:53,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:53,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:53,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681042120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:53,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:53,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:34:53,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558486574] [2021-08-06 19:34:53,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:34:53,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:53,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:34:53,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:34:53,148 INFO L87 Difference]: Start difference. First operand 308 states and 723 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:53,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:53,187 INFO L93 Difference]: Finished difference Result 360 states and 822 transitions. [2021-08-06 19:34:53,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:34:53,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:53,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:53,189 INFO L225 Difference]: With dead ends: 360 [2021-08-06 19:34:53,189 INFO L226 Difference]: Without dead ends: 360 [2021-08-06 19:34:53,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-08-06 19:34:53,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 347. [2021-08-06 19:34:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.3236994219653178) internal successors, (804), 346 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) [2021-08-06 19:34:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 804 transitions. [2021-08-06 19:34:53,193 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 804 transitions. Word has length 17 [2021-08-06 19:34:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:53,193 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 804 transitions. [2021-08-06 19:34:53,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:53,193 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 804 transitions. [2021-08-06 19:34:53,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:53,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:53,194 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:53,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:53,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:53,405 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:53,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:53,405 INFO L82 PathProgramCache]: Analyzing trace with hash 338348336, now seen corresponding path program 61 times [2021-08-06 19:34:53,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:53,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009355838] [2021-08-06 19:34:53,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:53,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:53,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:53,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009355838] [2021-08-06 19:34:53,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009355838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:53,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146143539] [2021-08-06 19:34:53,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:53,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:53,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:53,456 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:53,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 19:34:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:54,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:34:54,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:54,136 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:54,136 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:54,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146143539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:54,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:54,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 19:34:54,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392118514] [2021-08-06 19:34:54,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:34:54,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:54,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:34:54,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:34:54,157 INFO L87 Difference]: Start difference. First operand 347 states and 804 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:54,247 INFO L93 Difference]: Finished difference Result 369 states and 840 transitions. [2021-08-06 19:34:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:34:54,247 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:54,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:54,248 INFO L225 Difference]: With dead ends: 369 [2021-08-06 19:34:54,248 INFO L226 Difference]: Without dead ends: 369 [2021-08-06 19:34:54,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:34:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-08-06 19:34:54,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 354. [2021-08-06 19:34:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.31728045325779) internal successors, (818), 353 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 818 transitions. [2021-08-06 19:34:54,253 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 818 transitions. Word has length 17 [2021-08-06 19:34:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:54,253 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 818 transitions. [2021-08-06 19:34:54,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 818 transitions. [2021-08-06 19:34:54,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:34:54,253 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:54,253 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:54,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-06 19:34:54,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 19:34:54,461 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2030584882, now seen corresponding path program 62 times [2021-08-06 19:34:54,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:54,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337719762] [2021-08-06 19:34:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:54,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:54,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:54,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337719762] [2021-08-06 19:34:54,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337719762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:54,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212124098] [2021-08-06 19:34:54,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:34:54,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:54,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:54,529 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:54,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 19:34:55,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:34:55,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:55,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:34:55,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:55,230 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:55,230 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:55,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:55,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212124098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:55,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:55,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 19:34:55,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20354574] [2021-08-06 19:34:55,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:34:55,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:55,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:34:55,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:34:55,250 INFO L87 Difference]: Start difference. First operand 354 states and 818 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:55,345 INFO L93 Difference]: Finished difference Result 393 states and 896 transitions. [2021-08-06 19:34:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:34:55,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:34:55,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:55,347 INFO L225 Difference]: With dead ends: 393 [2021-08-06 19:34:55,347 INFO L226 Difference]: Without dead ends: 393 [2021-08-06 19:34:55,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:34:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-08-06 19:34:55,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 368. [2021-08-06 19:34:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.3051771117166213) internal successors, (846), 367 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) [2021-08-06 19:34:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 846 transitions. [2021-08-06 19:34:55,351 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 846 transitions. Word has length 17 [2021-08-06 19:34:55,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:55,352 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 846 transitions. [2021-08-06 19:34:55,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:55,352 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 846 transitions. [2021-08-06 19:34:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:34:55,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:55,352 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:55,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 19:34:55,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:55,553 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:55,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1251687980, now seen corresponding path program 63 times [2021-08-06 19:34:55,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:55,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688527822] [2021-08-06 19:34:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:55,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:55,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:55,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688527822] [2021-08-06 19:34:55,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688527822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:55,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841038664] [2021-08-06 19:34:55,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:34:55,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:55,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:55,616 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:55,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 19:34:56,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:34:56,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:56,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:34:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:56,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:56,332 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:56,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841038664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:56,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:56,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:34:56,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730629159] [2021-08-06 19:34:56,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:34:56,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:56,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:34:56,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:34:56,350 INFO L87 Difference]: Start difference. First operand 368 states and 846 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:56,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:56,454 INFO L93 Difference]: Finished difference Result 411 states and 913 transitions. [2021-08-06 19:34:56,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:34:56,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:34:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:56,455 INFO L225 Difference]: With dead ends: 411 [2021-08-06 19:34:56,455 INFO L226 Difference]: Without dead ends: 409 [2021-08-06 19:34:56,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:34:56,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-08-06 19:34:56,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 360. [2021-08-06 19:34:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.2924791086350975) internal successors, (823), 359 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 823 transitions. [2021-08-06 19:34:56,460 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 823 transitions. Word has length 18 [2021-08-06 19:34:56,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:56,460 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 823 transitions. [2021-08-06 19:34:56,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:56,460 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 823 transitions. [2021-08-06 19:34:56,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:34:56,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:56,461 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:56,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:56,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-06 19:34:56,676 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:56,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:56,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1306720805, now seen corresponding path program 64 times [2021-08-06 19:34:56,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:56,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198453409] [2021-08-06 19:34:56,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:56,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:56,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:56,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198453409] [2021-08-06 19:34:56,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198453409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:56,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682697867] [2021-08-06 19:34:56,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:34:56,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:56,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:56,740 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:56,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 19:34:57,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:34:57,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:57,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:34:57,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:57,461 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:57,461 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:34:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:57,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682697867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:57,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:57,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:34:57,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938595026] [2021-08-06 19:34:57,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:34:57,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:57,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:34:57,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:34:57,482 INFO L87 Difference]: Start difference. First operand 360 states and 823 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:57,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:57,596 INFO L93 Difference]: Finished difference Result 439 states and 943 transitions. [2021-08-06 19:34:57,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:34:57,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:34:57,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:57,598 INFO L225 Difference]: With dead ends: 439 [2021-08-06 19:34:57,598 INFO L226 Difference]: Without dead ends: 436 [2021-08-06 19:34:57,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:34:57,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-08-06 19:34:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 364. [2021-08-06 19:34:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.2920110192837466) internal successors, (832), 363 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 832 transitions. [2021-08-06 19:34:57,603 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 832 transitions. Word has length 18 [2021-08-06 19:34:57,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:57,603 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 832 transitions. [2021-08-06 19:34:57,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:57,603 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 832 transitions. [2021-08-06 19:34:57,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:34:57,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:57,604 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:57,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:57,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 19:34:57,812 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:57,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:57,812 INFO L82 PathProgramCache]: Analyzing trace with hash -861313567, now seen corresponding path program 65 times [2021-08-06 19:34:57,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:57,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335285728] [2021-08-06 19:34:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:57,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:57,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:57,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335285728] [2021-08-06 19:34:57,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335285728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:57,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116516424] [2021-08-06 19:34:57,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:34:57,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:57,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:57,858 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:57,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 19:34:58,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:34:58,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:58,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:34:58,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:58,585 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:58,586 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:58,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116516424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:58,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:58,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 19:34:58,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135525289] [2021-08-06 19:34:58,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:34:58,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:58,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:34:58,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:34:58,606 INFO L87 Difference]: Start difference. First operand 364 states and 832 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:58,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:58,648 INFO L93 Difference]: Finished difference Result 417 states and 889 transitions. [2021-08-06 19:34:58,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:34:58,649 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:34:58,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:58,650 INFO L225 Difference]: With dead ends: 417 [2021-08-06 19:34:58,650 INFO L226 Difference]: Without dead ends: 417 [2021-08-06 19:34:58,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:34:58,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-08-06 19:34:58,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 359. [2021-08-06 19:34:58,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.282122905027933) internal successors, (817), 358 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 817 transitions. [2021-08-06 19:34:58,655 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 817 transitions. Word has length 18 [2021-08-06 19:34:58,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:58,655 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 817 transitions. [2021-08-06 19:34:58,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:58,655 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 817 transitions. [2021-08-06 19:34:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:34:58,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:58,655 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:58,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 19:34:58,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 19:34:58,869 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash 491228693, now seen corresponding path program 66 times [2021-08-06 19:34:58,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:58,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623875545] [2021-08-06 19:34:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:58,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:58,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:58,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623875545] [2021-08-06 19:34:58,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623875545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:58,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25830052] [2021-08-06 19:34:58,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:34:58,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:58,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:58,926 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:58,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 19:34:59,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:34:59,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:34:59,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:34:59,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:34:59,644 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:59,645 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:34:59,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:34:59,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25830052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:59,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:34:59,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:34:59,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662230777] [2021-08-06 19:34:59,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:34:59,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:34:59,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:34:59,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:34:59,665 INFO L87 Difference]: Start difference. First operand 359 states and 817 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:34:59,715 INFO L93 Difference]: Finished difference Result 444 states and 948 transitions. [2021-08-06 19:34:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:34:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:34:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:34:59,717 INFO L225 Difference]: With dead ends: 444 [2021-08-06 19:34:59,717 INFO L226 Difference]: Without dead ends: 444 [2021-08-06 19:34:59,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:34:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-06 19:34:59,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 359. [2021-08-06 19:34:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.282122905027933) internal successors, (817), 358 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 817 transitions. [2021-08-06 19:34:59,722 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 817 transitions. Word has length 18 [2021-08-06 19:34:59,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:34:59,722 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 817 transitions. [2021-08-06 19:34:59,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:34:59,722 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 817 transitions. [2021-08-06 19:34:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:34:59,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:34:59,723 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:34:59,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 19:34:59,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 19:34:59,937 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:34:59,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:34:59,937 INFO L82 PathProgramCache]: Analyzing trace with hash -300923675, now seen corresponding path program 67 times [2021-08-06 19:34:59,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:34:59,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115558496] [2021-08-06 19:34:59,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:34:59,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:34:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:34:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:34:59,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:34:59,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115558496] [2021-08-06 19:34:59,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115558496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:34:59,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920591675] [2021-08-06 19:34:59,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:34:59,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:34:59,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:34:59,981 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:34:59,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 19:35:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:00,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:00,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:00,718 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:00,718 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:00,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920591675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:00,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:00,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:35:00,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719436581] [2021-08-06 19:35:00,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:35:00,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:00,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:35:00,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:35:00,738 INFO L87 Difference]: Start difference. First operand 359 states and 817 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:00,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:00,795 INFO L93 Difference]: Finished difference Result 415 states and 883 transitions. [2021-08-06 19:35:00,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:35:00,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-08-06 19:35:00,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:00,797 INFO L225 Difference]: With dead ends: 415 [2021-08-06 19:35:00,797 INFO L226 Difference]: Without dead ends: 414 [2021-08-06 19:35:00,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:35:00,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-08-06 19:35:00,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 367. [2021-08-06 19:35:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.278688524590164) internal successors, (834), 366 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 834 transitions. [2021-08-06 19:35:00,802 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 834 transitions. Word has length 18 [2021-08-06 19:35:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:00,802 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 834 transitions. [2021-08-06 19:35:00,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:00,802 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 834 transitions. [2021-08-06 19:35:00,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:00,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:00,803 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:00,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 19:35:01,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:01,003 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:01,003 INFO L82 PathProgramCache]: Analyzing trace with hash -333120702, now seen corresponding path program 68 times [2021-08-06 19:35:01,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:01,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459286260] [2021-08-06 19:35:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:01,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:01,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:01,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459286260] [2021-08-06 19:35:01,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459286260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:01,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699585346] [2021-08-06 19:35:01,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:35:01,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:01,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:01,060 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:01,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 19:35:01,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:35:01,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:01,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:01,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:01,820 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:01,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:01,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699585346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:01,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:01,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:35:01,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135378201] [2021-08-06 19:35:01,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:35:01,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:01,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:35:01,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:35:01,838 INFO L87 Difference]: Start difference. First operand 367 states and 834 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:01,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:01,883 INFO L93 Difference]: Finished difference Result 440 states and 973 transitions. [2021-08-06 19:35:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:35:01,883 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-08-06 19:35:01,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:01,885 INFO L225 Difference]: With dead ends: 440 [2021-08-06 19:35:01,885 INFO L226 Difference]: Without dead ends: 439 [2021-08-06 19:35:01,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:35:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-08-06 19:35:01,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 370. [2021-08-06 19:35:01,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.289972899728997) internal successors, (845), 369 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:01,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 845 transitions. [2021-08-06 19:35:01,889 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 845 transitions. Word has length 18 [2021-08-06 19:35:01,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:01,889 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 845 transitions. [2021-08-06 19:35:01,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 845 transitions. [2021-08-06 19:35:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:01,890 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:01,890 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:01,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 19:35:02,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:02,108 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:02,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1409689633, now seen corresponding path program 69 times [2021-08-06 19:35:02,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:02,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261038893] [2021-08-06 19:35:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:02,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:02,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:02,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:02,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261038893] [2021-08-06 19:35:02,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261038893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:02,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574561690] [2021-08-06 19:35:02,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:35:02,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:02,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:02,158 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:02,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 19:35:02,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:35:02,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:02,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:02,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:02,911 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:02,911 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:02,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574561690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:02,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:02,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:35:02,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893179689] [2021-08-06 19:35:02,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:35:02,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:02,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:35:02,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:35:02,932 INFO L87 Difference]: Start difference. First operand 370 states and 845 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:02,966 INFO L93 Difference]: Finished difference Result 413 states and 882 transitions. [2021-08-06 19:35:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:35:02,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-08-06 19:35:02,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:02,968 INFO L225 Difference]: With dead ends: 413 [2021-08-06 19:35:02,968 INFO L226 Difference]: Without dead ends: 413 [2021-08-06 19:35:02,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:35:02,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-06 19:35:02,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 367. [2021-08-06 19:35:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.2814207650273226) internal successors, (835), 366 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 835 transitions. [2021-08-06 19:35:02,973 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 835 transitions. Word has length 18 [2021-08-06 19:35:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:02,973 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 835 transitions. [2021-08-06 19:35:02,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 835 transitions. [2021-08-06 19:35:02,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:02,973 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:02,973 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:02,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:03,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:03,181 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:03,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:03,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2140575165, now seen corresponding path program 70 times [2021-08-06 19:35:03,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:03,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727828478] [2021-08-06 19:35:03,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:03,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:03,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:03,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:03,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727828478] [2021-08-06 19:35:03,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727828478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:03,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437808411] [2021-08-06 19:35:03,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:35:03,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:03,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:03,238 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:03,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 19:35:03,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:35:03,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:03,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:03,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:03,988 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:04,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437808411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:04,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:04,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:35:04,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369410327] [2021-08-06 19:35:04,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:35:04,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:04,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:35:04,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:35:04,009 INFO L87 Difference]: Start difference. First operand 367 states and 835 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:04,059 INFO L93 Difference]: Finished difference Result 427 states and 910 transitions. [2021-08-06 19:35:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:35:04,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:04,061 INFO L225 Difference]: With dead ends: 427 [2021-08-06 19:35:04,061 INFO L226 Difference]: Without dead ends: 427 [2021-08-06 19:35:04,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:35:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-08-06 19:35:04,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 364. [2021-08-06 19:35:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.272727272727273) internal successors, (825), 363 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 825 transitions. [2021-08-06 19:35:04,069 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 825 transitions. Word has length 18 [2021-08-06 19:35:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:04,069 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 825 transitions. [2021-08-06 19:35:04,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 825 transitions. [2021-08-06 19:35:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:04,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:04,070 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:04,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 19:35:04,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-06 19:35:04,290 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:04,290 INFO L82 PathProgramCache]: Analyzing trace with hash -529634207, now seen corresponding path program 71 times [2021-08-06 19:35:04,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:04,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401434825] [2021-08-06 19:35:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:04,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:04,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:04,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401434825] [2021-08-06 19:35:04,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401434825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:04,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462730237] [2021-08-06 19:35:04,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:35:04,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:04,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:04,353 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:04,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 19:35:05,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:35:05,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:05,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:05,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:05,114 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:05,114 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:05,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462730237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:05,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:05,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 19:35:05,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064026631] [2021-08-06 19:35:05,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:35:05,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:05,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:35:05,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:35:05,135 INFO L87 Difference]: Start difference. First operand 364 states and 825 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:05,219 INFO L93 Difference]: Finished difference Result 458 states and 968 transitions. [2021-08-06 19:35:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:35:05,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:05,221 INFO L225 Difference]: With dead ends: 458 [2021-08-06 19:35:05,221 INFO L226 Difference]: Without dead ends: 458 [2021-08-06 19:35:05,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:35:05,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-06 19:35:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 341. [2021-08-06 19:35:05,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.2676470588235293) internal successors, (771), 340 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 771 transitions. [2021-08-06 19:35:05,225 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 771 transitions. Word has length 18 [2021-08-06 19:35:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:05,225 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 771 transitions. [2021-08-06 19:35:05,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:05,226 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 771 transitions. [2021-08-06 19:35:05,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:05,226 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:05,226 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:05,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:05,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:05,427 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:05,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:05,427 INFO L82 PathProgramCache]: Analyzing trace with hash -282464649, now seen corresponding path program 72 times [2021-08-06 19:35:05,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:05,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630995943] [2021-08-06 19:35:05,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:05,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:05,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:05,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630995943] [2021-08-06 19:35:05,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630995943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:05,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239117425] [2021-08-06 19:35:05,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:35:05,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:05,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:05,477 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:05,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 19:35:06,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:35:06,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:06,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:06,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:06,245 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:06,246 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:06,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239117425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:06,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:06,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:35:06,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082120435] [2021-08-06 19:35:06,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:35:06,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:06,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:35:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:35:06,268 INFO L87 Difference]: Start difference. First operand 341 states and 771 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:06,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:06,331 INFO L93 Difference]: Finished difference Result 391 states and 831 transitions. [2021-08-06 19:35:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:35:06,332 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-08-06 19:35:06,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:06,333 INFO L225 Difference]: With dead ends: 391 [2021-08-06 19:35:06,333 INFO L226 Difference]: Without dead ends: 390 [2021-08-06 19:35:06,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:35:06,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-08-06 19:35:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 327. [2021-08-06 19:35:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.263803680981595) internal successors, (738), 326 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 738 transitions. [2021-08-06 19:35:06,337 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 738 transitions. Word has length 18 [2021-08-06 19:35:06,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:06,337 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 738 transitions. [2021-08-06 19:35:06,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 738 transitions. [2021-08-06 19:35:06,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:06,338 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:06,338 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:06,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 19:35:06,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:06,538 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:06,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:06,538 INFO L82 PathProgramCache]: Analyzing trace with hash -314661676, now seen corresponding path program 73 times [2021-08-06 19:35:06,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:06,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923710406] [2021-08-06 19:35:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:06,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:06,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:06,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923710406] [2021-08-06 19:35:06,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923710406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:06,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400642881] [2021-08-06 19:35:06,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:35:06,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:06,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:06,594 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:06,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 19:35:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:07,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:07,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:07,388 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:07,389 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:07,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400642881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:07,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:07,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:35:07,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917033699] [2021-08-06 19:35:07,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:35:07,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:07,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:35:07,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:35:07,406 INFO L87 Difference]: Start difference. First operand 327 states and 738 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:07,440 INFO L93 Difference]: Finished difference Result 398 states and 858 transitions. [2021-08-06 19:35:07,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:35:07,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-08-06 19:35:07,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:07,441 INFO L225 Difference]: With dead ends: 398 [2021-08-06 19:35:07,442 INFO L226 Difference]: Without dead ends: 397 [2021-08-06 19:35:07,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:35:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-08-06 19:35:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 321. [2021-08-06 19:35:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.25625) internal successors, (722), 320 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 722 transitions. [2021-08-06 19:35:07,445 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 722 transitions. Word has length 18 [2021-08-06 19:35:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:07,446 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 722 transitions. [2021-08-06 19:35:07,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 722 transitions. [2021-08-06 19:35:07,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:07,446 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:07,446 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:07,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 19:35:07,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-06 19:35:07,647 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:07,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:07,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1428148659, now seen corresponding path program 74 times [2021-08-06 19:35:07,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:07,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272577448] [2021-08-06 19:35:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:07,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:07,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:07,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272577448] [2021-08-06 19:35:07,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272577448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:07,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804028932] [2021-08-06 19:35:07,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:35:07,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:07,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:07,692 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:07,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 19:35:08,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:35:08,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:08,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:08,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:08,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:08,511 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:08,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804028932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:08,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:08,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:35:08,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279875487] [2021-08-06 19:35:08,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:35:08,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:08,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:35:08,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:35:08,532 INFO L87 Difference]: Start difference. First operand 321 states and 722 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:08,574 INFO L93 Difference]: Finished difference Result 367 states and 774 transitions. [2021-08-06 19:35:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:35:08,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-08-06 19:35:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:08,575 INFO L225 Difference]: With dead ends: 367 [2021-08-06 19:35:08,575 INFO L226 Difference]: Without dead ends: 367 [2021-08-06 19:35:08,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:35:08,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-08-06 19:35:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 321. [2021-08-06 19:35:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.25625) internal successors, (722), 320 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 722 transitions. [2021-08-06 19:35:08,579 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 722 transitions. Word has length 18 [2021-08-06 19:35:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:08,579 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 722 transitions. [2021-08-06 19:35:08,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:08,579 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 722 transitions. [2021-08-06 19:35:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:08,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:08,580 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:08,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 19:35:08,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 19:35:08,780 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:08,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2122116139, now seen corresponding path program 75 times [2021-08-06 19:35:08,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:08,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111379360] [2021-08-06 19:35:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:08,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:08,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:08,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111379360] [2021-08-06 19:35:08,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111379360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:08,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824651982] [2021-08-06 19:35:08,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:35:08,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:08,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:08,845 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:08,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 19:35:09,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:35:09,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:09,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:09,640 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:09,640 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:09,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824651982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:09,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:09,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:35:09,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465765255] [2021-08-06 19:35:09,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:35:09,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:09,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:35:09,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:35:09,660 INFO L87 Difference]: Start difference. First operand 321 states and 722 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:09,703 INFO L93 Difference]: Finished difference Result 351 states and 746 transitions. [2021-08-06 19:35:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:35:09,704 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:09,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:09,705 INFO L225 Difference]: With dead ends: 351 [2021-08-06 19:35:09,705 INFO L226 Difference]: Without dead ends: 351 [2021-08-06 19:35:09,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:35:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-06 19:35:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 314. [2021-08-06 19:35:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.2492012779552715) internal successors, (704), 313 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 704 transitions. [2021-08-06 19:35:09,709 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 704 transitions. Word has length 18 [2021-08-06 19:35:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:09,709 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 704 transitions. [2021-08-06 19:35:09,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 704 transitions. [2021-08-06 19:35:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:09,709 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:09,709 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:09,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-06 19:35:09,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:09,928 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:09,928 INFO L82 PathProgramCache]: Analyzing trace with hash -511175181, now seen corresponding path program 76 times [2021-08-06 19:35:09,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:09,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702551380] [2021-08-06 19:35:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:09,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:09,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:09,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702551380] [2021-08-06 19:35:09,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702551380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:09,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291583319] [2021-08-06 19:35:09,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:35:09,983 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:09,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:09,995 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:10,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 19:35:10,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:35:10,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:10,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:10,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:10,797 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:10,798 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:10,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291583319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:10,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:10,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:35:10,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604042774] [2021-08-06 19:35:10,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:35:10,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:10,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:35:10,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:35:10,820 INFO L87 Difference]: Start difference. First operand 314 states and 704 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:10,890 INFO L93 Difference]: Finished difference Result 364 states and 772 transitions. [2021-08-06 19:35:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:35:10,890 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:10,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:10,891 INFO L225 Difference]: With dead ends: 364 [2021-08-06 19:35:10,891 INFO L226 Difference]: Without dead ends: 364 [2021-08-06 19:35:10,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:35:10,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-06 19:35:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 312. [2021-08-06 19:35:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.2411575562700965) internal successors, (697), 311 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:10,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 697 transitions. [2021-08-06 19:35:10,897 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 697 transitions. Word has length 18 [2021-08-06 19:35:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:10,897 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 697 transitions. [2021-08-06 19:35:10,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 697 transitions. [2021-08-06 19:35:10,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:10,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:10,898 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:10,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:11,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:11,098 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:11,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:11,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2111613035, now seen corresponding path program 77 times [2021-08-06 19:35:11,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:11,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79630716] [2021-08-06 19:35:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:11,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:11,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:11,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79630716] [2021-08-06 19:35:11,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79630716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:11,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206560866] [2021-08-06 19:35:11,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:35:11,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:11,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:11,159 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:11,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 19:35:11,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:35:11,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:11,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:11,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:11,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:11,937 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:11,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206560866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:11,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:11,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:35:11,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640220391] [2021-08-06 19:35:11,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:35:11,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:11,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:35:11,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:35:11,957 INFO L87 Difference]: Start difference. First operand 312 states and 697 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:12,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:12,060 INFO L93 Difference]: Finished difference Result 466 states and 1000 transitions. [2021-08-06 19:35:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:35:12,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:12,062 INFO L225 Difference]: With dead ends: 466 [2021-08-06 19:35:12,062 INFO L226 Difference]: Without dead ends: 466 [2021-08-06 19:35:12,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:35:12,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-08-06 19:35:12,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 330. [2021-08-06 19:35:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.231003039513678) internal successors, (734), 329 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 734 transitions. [2021-08-06 19:35:12,067 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 734 transitions. Word has length 18 [2021-08-06 19:35:12,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:12,067 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 734 transitions. [2021-08-06 19:35:12,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:12,067 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 734 transitions. [2021-08-06 19:35:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:12,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:12,067 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:12,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 19:35:12,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:12,277 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:12,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:12,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1581276001, now seen corresponding path program 78 times [2021-08-06 19:35:12,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:12,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341982226] [2021-08-06 19:35:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:12,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:12,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:12,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341982226] [2021-08-06 19:35:12,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341982226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:12,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128008644] [2021-08-06 19:35:12,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:35:12,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:12,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:12,329 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:12,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 19:35:13,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:35:13,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:13,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:13,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:13,117 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:13,117 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:13,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128008644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:13,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:13,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:35:13,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592305515] [2021-08-06 19:35:13,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:35:13,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:13,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:35:13,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:35:13,139 INFO L87 Difference]: Start difference. First operand 330 states and 734 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:13,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:13,211 INFO L93 Difference]: Finished difference Result 365 states and 766 transitions. [2021-08-06 19:35:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:35:13,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 19:35:13,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:13,213 INFO L225 Difference]: With dead ends: 365 [2021-08-06 19:35:13,213 INFO L226 Difference]: Without dead ends: 363 [2021-08-06 19:35:13,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:35:13,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-08-06 19:35:13,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 330. [2021-08-06 19:35:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2279635258358663) internal successors, (733), 329 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 733 transitions. [2021-08-06 19:35:13,217 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 733 transitions. Word has length 18 [2021-08-06 19:35:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:13,217 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 733 transitions. [2021-08-06 19:35:13,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 733 transitions. [2021-08-06 19:35:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:13,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:13,218 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:13,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 19:35:13,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:13,418 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:13,419 INFO L82 PathProgramCache]: Analyzing trace with hash 583168164, now seen corresponding path program 79 times [2021-08-06 19:35:13,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:13,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557339168] [2021-08-06 19:35:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:13,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:13,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:13,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557339168] [2021-08-06 19:35:13,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557339168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:13,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505088379] [2021-08-06 19:35:13,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:35:13,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:13,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:13,479 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:13,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 19:35:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:14,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:14,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:14,304 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:14,304 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:14,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505088379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:14,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:14,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:35:14,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328798277] [2021-08-06 19:35:14,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:35:14,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:35:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:35:14,322 INFO L87 Difference]: Start difference. First operand 330 states and 733 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:14,391 INFO L93 Difference]: Finished difference Result 398 states and 848 transitions. [2021-08-06 19:35:14,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:35:14,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 19:35:14,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:14,392 INFO L225 Difference]: With dead ends: 398 [2021-08-06 19:35:14,392 INFO L226 Difference]: Without dead ends: 398 [2021-08-06 19:35:14,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:35:14,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-08-06 19:35:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 334. [2021-08-06 19:35:14,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.2372372372372373) internal successors, (745), 333 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 745 transitions. [2021-08-06 19:35:14,396 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 745 transitions. Word has length 18 [2021-08-06 19:35:14,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:14,396 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 745 transitions. [2021-08-06 19:35:14,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:14,397 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 745 transitions. [2021-08-06 19:35:14,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:14,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:14,397 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:14,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:14,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:14,598 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:14,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:14,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1116897503, now seen corresponding path program 80 times [2021-08-06 19:35:14,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:14,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791966872] [2021-08-06 19:35:14,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:14,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:14,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:14,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791966872] [2021-08-06 19:35:14,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791966872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:14,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089106053] [2021-08-06 19:35:14,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:35:14,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:14,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:14,656 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:14,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 19:35:15,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:35:15,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:15,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:15,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:15,486 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:15,487 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:15,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089106053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:15,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:15,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:35:15,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272504067] [2021-08-06 19:35:15,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:35:15,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:15,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:35:15,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:35:15,508 INFO L87 Difference]: Start difference. First operand 334 states and 745 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:15,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:15,603 INFO L93 Difference]: Finished difference Result 438 states and 947 transitions. [2021-08-06 19:35:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:35:15,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:15,605 INFO L225 Difference]: With dead ends: 438 [2021-08-06 19:35:15,605 INFO L226 Difference]: Without dead ends: 438 [2021-08-06 19:35:15,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:35:15,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-08-06 19:35:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 296. [2021-08-06 19:35:15,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.2610169491525425) internal successors, (667), 295 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 667 transitions. [2021-08-06 19:35:15,609 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 667 transitions. Word has length 18 [2021-08-06 19:35:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:15,609 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 667 transitions. [2021-08-06 19:35:15,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:15,609 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 667 transitions. [2021-08-06 19:35:15,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:15,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:15,610 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:15,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:15,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-06 19:35:15,817 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:15,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:15,818 INFO L82 PathProgramCache]: Analyzing trace with hash 289765157, now seen corresponding path program 81 times [2021-08-06 19:35:15,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:15,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350338141] [2021-08-06 19:35:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:15,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:15,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:15,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350338141] [2021-08-06 19:35:15,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350338141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:15,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187595062] [2021-08-06 19:35:15,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:35:15,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:15,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:15,867 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:15,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 19:35:16,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:35:16,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:16,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:16,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:16,671 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:16,672 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:16,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187595062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:16,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:16,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:35:16,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402543671] [2021-08-06 19:35:16,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:35:16,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:16,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:35:16,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:35:16,701 INFO L87 Difference]: Start difference. First operand 296 states and 667 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:16,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:16,747 INFO L93 Difference]: Finished difference Result 326 states and 704 transitions. [2021-08-06 19:35:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:35:16,752 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-08-06 19:35:16,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:16,753 INFO L225 Difference]: With dead ends: 326 [2021-08-06 19:35:16,753 INFO L226 Difference]: Without dead ends: 325 [2021-08-06 19:35:16,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:35:16,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-08-06 19:35:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 304. [2021-08-06 19:35:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.2607260726072607) internal successors, (685), 303 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 685 transitions. [2021-08-06 19:35:16,757 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 685 transitions. Word has length 18 [2021-08-06 19:35:16,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:16,757 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 685 transitions. [2021-08-06 19:35:16,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 685 transitions. [2021-08-06 19:35:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:16,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:16,758 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:16,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-06 19:35:16,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:16,959 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:16,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:16,959 INFO L82 PathProgramCache]: Analyzing trace with hash 257568130, now seen corresponding path program 82 times [2021-08-06 19:35:16,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:16,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224282702] [2021-08-06 19:35:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:16,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:17,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:17,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224282702] [2021-08-06 19:35:17,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224282702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:17,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937090744] [2021-08-06 19:35:17,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:35:17,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:17,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:17,011 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:17,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 19:35:17,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:35:17,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:17,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:17,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:17,866 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:17,867 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:17,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937090744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:17,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:17,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:35:17,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793832504] [2021-08-06 19:35:17,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:35:17,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:35:17,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:35:17,887 INFO L87 Difference]: Start difference. First operand 304 states and 685 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:17,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:17,927 INFO L93 Difference]: Finished difference Result 394 states and 840 transitions. [2021-08-06 19:35:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:35:17,927 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-08-06 19:35:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:17,928 INFO L225 Difference]: With dead ends: 394 [2021-08-06 19:35:17,928 INFO L226 Difference]: Without dead ends: 394 [2021-08-06 19:35:17,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:35:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-06 19:35:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 316. [2021-08-06 19:35:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.2888888888888888) internal successors, (721), 315 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 721 transitions. [2021-08-06 19:35:17,932 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 721 transitions. Word has length 18 [2021-08-06 19:35:17,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:17,932 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 721 transitions. [2021-08-06 19:35:17,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 721 transitions. [2021-08-06 19:35:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:17,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:17,933 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:17,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:18,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:18,149 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:18,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2000378465, now seen corresponding path program 83 times [2021-08-06 19:35:18,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:18,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433685418] [2021-08-06 19:35:18,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:18,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:18,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:18,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433685418] [2021-08-06 19:35:18,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433685418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:18,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256112807] [2021-08-06 19:35:18,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:35:18,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:18,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:18,201 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:18,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 19:35:18,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:35:18,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:18,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:18,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:19,018 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:19,019 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:19,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256112807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:19,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:19,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-06 19:35:19,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720292691] [2021-08-06 19:35:19,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:35:19,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:19,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:35:19,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:35:19,039 INFO L87 Difference]: Start difference. First operand 316 states and 721 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:19,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:19,084 INFO L93 Difference]: Finished difference Result 350 states and 765 transitions. [2021-08-06 19:35:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:35:19,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 18 [2021-08-06 19:35:19,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:19,086 INFO L225 Difference]: With dead ends: 350 [2021-08-06 19:35:19,086 INFO L226 Difference]: Without dead ends: 350 [2021-08-06 19:35:19,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:35:19,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-08-06 19:35:19,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 317. [2021-08-06 19:35:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.287974683544304) internal successors, (723), 316 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 723 transitions. [2021-08-06 19:35:19,090 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 723 transitions. Word has length 18 [2021-08-06 19:35:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:19,090 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 723 transitions. [2021-08-06 19:35:19,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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) [2021-08-06 19:35:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 723 transitions. [2021-08-06 19:35:19,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:19,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:19,091 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:19,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:19,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:19,296 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:19,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1549886333, now seen corresponding path program 84 times [2021-08-06 19:35:19,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:19,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166879859] [2021-08-06 19:35:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:19,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:19,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:19,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166879859] [2021-08-06 19:35:19,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166879859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:19,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336312813] [2021-08-06 19:35:19,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:35:19,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:19,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:19,373 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:19,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 19:35:20,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:35:20,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:20,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:20,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:20,249 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:20,250 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:20,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336312813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:20,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:20,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:35:20,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828786545] [2021-08-06 19:35:20,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:35:20,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:20,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:35:20,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:35:20,271 INFO L87 Difference]: Start difference. First operand 317 states and 723 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:20,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:20,330 INFO L93 Difference]: Finished difference Result 355 states and 775 transitions. [2021-08-06 19:35:20,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:35:20,330 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:20,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:20,331 INFO L225 Difference]: With dead ends: 355 [2021-08-06 19:35:20,331 INFO L226 Difference]: Without dead ends: 355 [2021-08-06 19:35:20,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:35:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-08-06 19:35:20,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 299. [2021-08-06 19:35:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.2885906040268456) internal successors, (682), 298 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 682 transitions. [2021-08-06 19:35:20,335 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 682 transitions. Word has length 18 [2021-08-06 19:35:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:20,335 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 682 transitions. [2021-08-06 19:35:20,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 682 transitions. [2021-08-06 19:35:20,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:20,336 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:20,336 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:20,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 19:35:20,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:20,536 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:20,536 INFO L82 PathProgramCache]: Analyzing trace with hash 61054625, now seen corresponding path program 85 times [2021-08-06 19:35:20,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:20,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872697342] [2021-08-06 19:35:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:20,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:20,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:20,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872697342] [2021-08-06 19:35:20,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872697342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:20,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870699034] [2021-08-06 19:35:20,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:35:20,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:20,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:20,600 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:20,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 19:35:21,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:21,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:21,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:21,447 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:21,448 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:21,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870699034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:21,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:21,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 19:35:21,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990199281] [2021-08-06 19:35:21,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:35:21,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:21,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:35:21,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:35:21,468 INFO L87 Difference]: Start difference. First operand 299 states and 682 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:21,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:21,517 INFO L93 Difference]: Finished difference Result 313 states and 687 transitions. [2021-08-06 19:35:21,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 19:35:21,517 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:21,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:21,518 INFO L225 Difference]: With dead ends: 313 [2021-08-06 19:35:21,518 INFO L226 Difference]: Without dead ends: 313 [2021-08-06 19:35:21,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:35:21,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-06 19:35:21,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 278. [2021-08-06 19:35:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.2851985559566788) internal successors, (633), 277 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 633 transitions. [2021-08-06 19:35:21,523 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 633 transitions. Word has length 18 [2021-08-06 19:35:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:21,523 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 633 transitions. [2021-08-06 19:35:21,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 633 transitions. [2021-08-06 19:35:21,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:21,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:21,523 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:21,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:21,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:21,724 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:21,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:21,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1539383229, now seen corresponding path program 86 times [2021-08-06 19:35:21,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:21,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047006951] [2021-08-06 19:35:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:21,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:21,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:21,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047006951] [2021-08-06 19:35:21,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047006951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:21,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756571232] [2021-08-06 19:35:21,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:35:21,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:21,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:21,784 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:21,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 19:35:22,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:35:22,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:22,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:22,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:22,635 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:22,635 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:22,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756571232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:22,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:22,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:35:22,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575122071] [2021-08-06 19:35:22,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:35:22,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:22,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:35:22,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:35:22,656 INFO L87 Difference]: Start difference. First operand 278 states and 633 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:22,738 INFO L93 Difference]: Finished difference Result 310 states and 681 transitions. [2021-08-06 19:35:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:35:22,739 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:22,740 INFO L225 Difference]: With dead ends: 310 [2021-08-06 19:35:22,740 INFO L226 Difference]: Without dead ends: 310 [2021-08-06 19:35:22,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:35:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-08-06 19:35:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 243. [2021-08-06 19:35:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.309917355371901) internal successors, (559), 242 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 559 transitions. [2021-08-06 19:35:22,743 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 559 transitions. Word has length 18 [2021-08-06 19:35:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:22,743 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 559 transitions. [2021-08-06 19:35:22,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 559 transitions. [2021-08-06 19:35:22,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:22,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:22,743 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:22,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:22,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-06 19:35:22,957 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:22,957 INFO L82 PathProgramCache]: Analyzing trace with hash 386650849, now seen corresponding path program 87 times [2021-08-06 19:35:22,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:22,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950038717] [2021-08-06 19:35:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:22,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:23,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:23,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950038717] [2021-08-06 19:35:23,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950038717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:23,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344404797] [2021-08-06 19:35:23,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:35:23,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:23,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:23,021 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:23,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 19:35:23,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:35:23,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:23,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:23,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:23,860 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:23,860 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:23,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344404797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:23,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:23,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:35:23,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392793680] [2021-08-06 19:35:23,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:35:23,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:23,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:35:23,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:35:23,880 INFO L87 Difference]: Start difference. First operand 243 states and 559 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:24,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:24,012 INFO L93 Difference]: Finished difference Result 323 states and 713 transitions. [2021-08-06 19:35:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:35:24,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:24,013 INFO L225 Difference]: With dead ends: 323 [2021-08-06 19:35:24,013 INFO L226 Difference]: Without dead ends: 323 [2021-08-06 19:35:24,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:35:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-08-06 19:35:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 264. [2021-08-06 19:35:24,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.2927756653992395) internal successors, (603), 263 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 603 transitions. [2021-08-06 19:35:24,016 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 603 transitions. Word has length 18 [2021-08-06 19:35:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:24,016 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 603 transitions. [2021-08-06 19:35:24,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 603 transitions. [2021-08-06 19:35:24,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:24,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:24,016 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:24,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:24,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:24,233 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:24,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1942280875, now seen corresponding path program 88 times [2021-08-06 19:35:24,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:24,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978959212] [2021-08-06 19:35:24,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:24,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:24,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:24,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978959212] [2021-08-06 19:35:24,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978959212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:24,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341632405] [2021-08-06 19:35:24,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:35:24,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:24,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:24,293 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:24,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 19:35:25,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:35:25,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:25,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:25,149 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:25,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:25,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341632405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:25,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:25,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:35:25,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335403896] [2021-08-06 19:35:25,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:35:25,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:25,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:35:25,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:35:25,170 INFO L87 Difference]: Start difference. First operand 264 states and 603 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:25,260 INFO L93 Difference]: Finished difference Result 322 states and 670 transitions. [2021-08-06 19:35:25,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:35:25,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:25,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:25,261 INFO L225 Difference]: With dead ends: 322 [2021-08-06 19:35:25,261 INFO L226 Difference]: Without dead ends: 320 [2021-08-06 19:35:25,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:35:25,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-08-06 19:35:25,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 271. [2021-08-06 19:35:25,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.3) internal successors, (621), 270 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:25,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 621 transitions. [2021-08-06 19:35:25,265 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 621 transitions. Word has length 18 [2021-08-06 19:35:25,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:25,265 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 621 transitions. [2021-08-06 19:35:25,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 621 transitions. [2021-08-06 19:35:25,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:25,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:25,265 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:25,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 19:35:25,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:25,473 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:25,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1354578584, now seen corresponding path program 89 times [2021-08-06 19:35:25,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:25,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455546583] [2021-08-06 19:35:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:25,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:25,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:25,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455546583] [2021-08-06 19:35:25,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455546583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:25,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839427454] [2021-08-06 19:35:25,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:35:25,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:25,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:25,537 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:25,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 19:35:26,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:35:26,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:26,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:26,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:26,419 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:26,420 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:26,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839427454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:26,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:26,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:35:26,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584548923] [2021-08-06 19:35:26,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:35:26,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:26,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:35:26,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:35:26,437 INFO L87 Difference]: Start difference. First operand 271 states and 621 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:26,513 INFO L93 Difference]: Finished difference Result 366 states and 795 transitions. [2021-08-06 19:35:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:35:26,513 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:26,514 INFO L225 Difference]: With dead ends: 366 [2021-08-06 19:35:26,514 INFO L226 Difference]: Without dead ends: 366 [2021-08-06 19:35:26,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:35:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-08-06 19:35:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 282. [2021-08-06 19:35:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.3131672597864767) internal successors, (650), 281 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 650 transitions. [2021-08-06 19:35:26,518 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 650 transitions. Word has length 18 [2021-08-06 19:35:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:26,518 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 650 transitions. [2021-08-06 19:35:26,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 650 transitions. [2021-08-06 19:35:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:26,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:26,519 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:26,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 19:35:26,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:26,720 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:26,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1257737429, now seen corresponding path program 90 times [2021-08-06 19:35:26,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:26,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950712286] [2021-08-06 19:35:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:26,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:26,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:26,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950712286] [2021-08-06 19:35:26,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950712286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:26,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114620560] [2021-08-06 19:35:26,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:35:26,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:26,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:26,779 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:26,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 19:35:27,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:35:27,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:27,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:27,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:27,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:27,672 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:27,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114620560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:27,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:27,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:35:27,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172637705] [2021-08-06 19:35:27,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:35:27,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:27,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:35:27,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:35:27,692 INFO L87 Difference]: Start difference. First operand 282 states and 650 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:27,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:27,742 INFO L93 Difference]: Finished difference Result 333 states and 708 transitions. [2021-08-06 19:35:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:35:27,742 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:27,743 INFO L225 Difference]: With dead ends: 333 [2021-08-06 19:35:27,743 INFO L226 Difference]: Without dead ends: 333 [2021-08-06 19:35:27,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:35:27,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-08-06 19:35:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 283. [2021-08-06 19:35:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.301418439716312) internal successors, (649), 282 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 649 transitions. [2021-08-06 19:35:27,747 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 649 transitions. Word has length 18 [2021-08-06 19:35:27,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:27,747 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 649 transitions. [2021-08-06 19:35:27,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:27,748 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 649 transitions. [2021-08-06 19:35:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:27,748 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:27,748 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:27,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 19:35:27,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:27,949 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:27,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:27,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1158061269, now seen corresponding path program 91 times [2021-08-06 19:35:27,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:27,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865818870] [2021-08-06 19:35:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:27,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:27,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:28,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:28,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865818870] [2021-08-06 19:35:28,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865818870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:28,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156940041] [2021-08-06 19:35:28,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:35:28,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:28,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:28,040 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:28,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 19:35:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:28,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:28,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:28,907 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:28,907 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:28,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156940041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:28,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:28,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:35:28,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597801563] [2021-08-06 19:35:28,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:35:28,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:28,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:35:28,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:35:28,927 INFO L87 Difference]: Start difference. First operand 283 states and 649 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:29,042 INFO L93 Difference]: Finished difference Result 332 states and 742 transitions. [2021-08-06 19:35:29,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:35:29,042 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:29,043 INFO L225 Difference]: With dead ends: 332 [2021-08-06 19:35:29,043 INFO L226 Difference]: Without dead ends: 332 [2021-08-06 19:35:29,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=171, Invalid=335, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:35:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-08-06 19:35:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 283. [2021-08-06 19:35:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.3049645390070923) internal successors, (650), 282 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 650 transitions. [2021-08-06 19:35:29,046 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 650 transitions. Word has length 18 [2021-08-06 19:35:29,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:29,046 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 650 transitions. [2021-08-06 19:35:29,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:29,046 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 650 transitions. [2021-08-06 19:35:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:29,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:29,046 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:29,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:29,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:29,247 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:29,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:29,247 INFO L82 PathProgramCache]: Analyzing trace with hash 849019959, now seen corresponding path program 92 times [2021-08-06 19:35:29,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:29,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539850570] [2021-08-06 19:35:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:29,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:29,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:29,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539850570] [2021-08-06 19:35:29,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539850570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:29,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611933430] [2021-08-06 19:35:29,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:35:29,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:29,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:29,298 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:29,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 19:35:30,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:35:30,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:30,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:30,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:30,165 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:30,165 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:30,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611933430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:30,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:30,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:35:30,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177163727] [2021-08-06 19:35:30,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:35:30,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:30,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:35:30,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:35:30,189 INFO L87 Difference]: Start difference. First operand 283 states and 650 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:30,259 INFO L93 Difference]: Finished difference Result 327 states and 700 transitions. [2021-08-06 19:35:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:35:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:30,260 INFO L225 Difference]: With dead ends: 327 [2021-08-06 19:35:30,260 INFO L226 Difference]: Without dead ends: 326 [2021-08-06 19:35:30,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:35:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-08-06 19:35:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 290. [2021-08-06 19:35:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.311418685121107) internal successors, (668), 289 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 668 transitions. [2021-08-06 19:35:30,264 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 668 transitions. Word has length 18 [2021-08-06 19:35:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:30,264 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 668 transitions. [2021-08-06 19:35:30,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:30,264 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 668 transitions. [2021-08-06 19:35:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:30,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:30,264 INFO L512 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:30,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-06 19:35:30,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-06 19:35:30,473 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:30,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:30,473 INFO L82 PathProgramCache]: Analyzing trace with hash 816822932, now seen corresponding path program 93 times [2021-08-06 19:35:30,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:30,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993078282] [2021-08-06 19:35:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:30,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:30,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:30,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993078282] [2021-08-06 19:35:30,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993078282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:30,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597265340] [2021-08-06 19:35:30,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:35:30,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:30,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:30,545 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:30,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 19:35:31,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:35:31,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:31,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:31,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:31,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:31,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:35:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:31,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597265340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:31,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:31,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:35:31,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186775362] [2021-08-06 19:35:31,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:35:31,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:31,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:35:31,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:35:31,537 INFO L87 Difference]: Start difference. First operand 290 states and 668 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:31,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:31,580 INFO L93 Difference]: Finished difference Result 421 states and 901 transitions. [2021-08-06 19:35:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:35:31,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:31,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:31,581 INFO L225 Difference]: With dead ends: 421 [2021-08-06 19:35:31,581 INFO L226 Difference]: Without dead ends: 421 [2021-08-06 19:35:31,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:35:31,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-08-06 19:35:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 342. [2021-08-06 19:35:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.310850439882698) internal successors, (788), 341 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 788 transitions. [2021-08-06 19:35:31,586 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 788 transitions. Word has length 18 [2021-08-06 19:35:31,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:31,586 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 788 transitions. [2021-08-06 19:35:31,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 788 transitions. [2021-08-06 19:35:31,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:31,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:31,587 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:31,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 19:35:31,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-06 19:35:31,788 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:31,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:31,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1735334029, now seen corresponding path program 94 times [2021-08-06 19:35:31,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:31,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714872409] [2021-08-06 19:35:31,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:31,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:31,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:31,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714872409] [2021-08-06 19:35:31,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714872409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:31,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253799974] [2021-08-06 19:35:31,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:35:31,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:31,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:31,846 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:31,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 19:35:32,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:35:32,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:32,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:32,721 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:32,721 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:32,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253799974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:32,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:32,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:35:32,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788698622] [2021-08-06 19:35:32,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:35:32,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:32,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:35:32,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:35:32,741 INFO L87 Difference]: Start difference. First operand 342 states and 788 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:32,800 INFO L93 Difference]: Finished difference Result 394 states and 852 transitions. [2021-08-06 19:35:32,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:35:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:32,801 INFO L225 Difference]: With dead ends: 394 [2021-08-06 19:35:32,801 INFO L226 Difference]: Without dead ends: 394 [2021-08-06 19:35:32,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:35:32,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-06 19:35:32,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 346. [2021-08-06 19:35:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.307246376811594) internal successors, (796), 345 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 796 transitions. [2021-08-06 19:35:32,805 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 796 transitions. Word has length 18 [2021-08-06 19:35:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:32,805 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 796 transitions. [2021-08-06 19:35:32,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 796 transitions. [2021-08-06 19:35:32,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:32,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:32,806 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:32,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 19:35:33,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:33,006 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:33,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:33,006 INFO L82 PathProgramCache]: Analyzing trace with hash -990631531, now seen corresponding path program 95 times [2021-08-06 19:35:33,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:33,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849867225] [2021-08-06 19:35:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:33,007 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:33,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:33,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849867225] [2021-08-06 19:35:33,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849867225] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:33,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160250079] [2021-08-06 19:35:33,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:35:33,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:33,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:33,060 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:33,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 19:35:33,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:35:33,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:33,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:33,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:33,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:33,954 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:33,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160250079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:33,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:33,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-06 19:35:33,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176493373] [2021-08-06 19:35:33,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:35:33,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:33,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:35:33,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:35:33,973 INFO L87 Difference]: Start difference. First operand 346 states and 796 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:34,031 INFO L93 Difference]: Finished difference Result 384 states and 858 transitions. [2021-08-06 19:35:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:35:34,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:34,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:34,032 INFO L225 Difference]: With dead ends: 384 [2021-08-06 19:35:34,032 INFO L226 Difference]: Without dead ends: 384 [2021-08-06 19:35:34,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:35:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-08-06 19:35:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 358. [2021-08-06 19:35:34,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.302521008403361) internal successors, (822), 357 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 822 transitions. [2021-08-06 19:35:34,036 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 822 transitions. Word has length 18 [2021-08-06 19:35:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:34,036 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 822 transitions. [2021-08-06 19:35:34,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 822 transitions. [2021-08-06 19:35:34,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:34,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:34,037 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:34,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:34,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:34,237 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:34,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:34,238 INFO L82 PathProgramCache]: Analyzing trace with hash 620309427, now seen corresponding path program 96 times [2021-08-06 19:35:34,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:34,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762220505] [2021-08-06 19:35:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:34,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:34,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:34,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762220505] [2021-08-06 19:35:34,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762220505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:34,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045182817] [2021-08-06 19:35:34,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:35:34,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:34,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:34,297 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:34,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 19:35:35,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:35:35,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:35,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:35,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:35,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:35,195 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:35,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045182817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:35,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:35,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 19:35:35,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318473775] [2021-08-06 19:35:35,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:35:35,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:35,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:35:35,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:35:35,215 INFO L87 Difference]: Start difference. First operand 358 states and 822 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:35,284 INFO L93 Difference]: Finished difference Result 386 states and 862 transitions. [2021-08-06 19:35:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:35:35,285 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:35,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:35,285 INFO L225 Difference]: With dead ends: 386 [2021-08-06 19:35:35,285 INFO L226 Difference]: Without dead ends: 386 [2021-08-06 19:35:35,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:35:35,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-08-06 19:35:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 359. [2021-08-06 19:35:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.3016759776536313) internal successors, (824), 358 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 824 transitions. [2021-08-06 19:35:35,289 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 824 transitions. Word has length 18 [2021-08-06 19:35:35,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:35,289 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 824 transitions. [2021-08-06 19:35:35,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:35,289 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 824 transitions. [2021-08-06 19:35:35,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:35,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:35,290 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:35,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:35,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-06 19:35:35,493 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:35,493 INFO L82 PathProgramCache]: Analyzing trace with hash -980128427, now seen corresponding path program 97 times [2021-08-06 19:35:35,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:35,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583581044] [2021-08-06 19:35:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:35,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:35,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:35,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583581044] [2021-08-06 19:35:35,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583581044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:35,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2453571] [2021-08-06 19:35:35,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:35:35,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:35,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:35,565 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:35,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 19:35:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:36,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:36,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:36,470 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:36,470 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:35:36,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2453571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:36,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:36,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 19:35:36,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156353607] [2021-08-06 19:35:36,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:35:36,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:36,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:35:36,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:35:36,490 INFO L87 Difference]: Start difference. First operand 359 states and 824 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:36,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:36,534 INFO L93 Difference]: Finished difference Result 395 states and 896 transitions. [2021-08-06 19:35:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:35:36,535 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:36,535 INFO L225 Difference]: With dead ends: 395 [2021-08-06 19:35:36,535 INFO L226 Difference]: Without dead ends: 395 [2021-08-06 19:35:36,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:35:36,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-08-06 19:35:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 387. [2021-08-06 19:35:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.2797927461139897) internal successors, (880), 386 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 880 transitions. [2021-08-06 19:35:36,539 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 880 transitions. Word has length 18 [2021-08-06 19:35:36,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:36,540 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 880 transitions. [2021-08-06 19:35:36,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:36,540 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 880 transitions. [2021-08-06 19:35:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:36,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:36,540 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:36,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:36,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:36,750 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:36,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:36,750 INFO L82 PathProgramCache]: Analyzing trace with hash 945905651, now seen corresponding path program 98 times [2021-08-06 19:35:36,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:36,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090132652] [2021-08-06 19:35:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:36,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:36,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:36,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090132652] [2021-08-06 19:35:36,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090132652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:36,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592208182] [2021-08-06 19:35:36,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:35:36,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:36,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:36,822 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:36,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 19:35:37,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:35:37,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:37,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:37,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:37,762 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:37,762 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:37,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592208182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:37,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:37,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:35:37,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295956712] [2021-08-06 19:35:37,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:35:37,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:37,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:35:37,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:35:37,783 INFO L87 Difference]: Start difference. First operand 387 states and 880 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:37,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:37,866 INFO L93 Difference]: Finished difference Result 400 states and 906 transitions. [2021-08-06 19:35:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:35:37,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:37,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:37,867 INFO L225 Difference]: With dead ends: 400 [2021-08-06 19:35:37,867 INFO L226 Difference]: Without dead ends: 400 [2021-08-06 19:35:37,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:35:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-08-06 19:35:37,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 387. [2021-08-06 19:35:37,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.2797927461139897) internal successors, (880), 386 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 880 transitions. [2021-08-06 19:35:37,871 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 880 transitions. Word has length 18 [2021-08-06 19:35:37,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:37,871 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 880 transitions. [2021-08-06 19:35:37,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:37,871 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 880 transitions. [2021-08-06 19:35:37,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 19:35:37,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:37,872 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:37,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:38,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:38,072 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:38,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:38,073 INFO L82 PathProgramCache]: Analyzing trace with hash 523419925, now seen corresponding path program 99 times [2021-08-06 19:35:38,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:38,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705944244] [2021-08-06 19:35:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:38,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:38,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:38,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705944244] [2021-08-06 19:35:38,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705944244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:38,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091834872] [2021-08-06 19:35:38,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:35:38,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:38,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:38,138 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:38,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 19:35:39,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:35:39,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:39,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:35:39,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:39,071 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:39,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:35:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:39,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091834872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:39,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:39,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:35:39,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881729268] [2021-08-06 19:35:39,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:35:39,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:39,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:35:39,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:35:39,092 INFO L87 Difference]: Start difference. First operand 387 states and 880 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:39,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:39,212 INFO L93 Difference]: Finished difference Result 460 states and 1026 transitions. [2021-08-06 19:35:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:35:39,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 [2021-08-06 19:35:39,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:39,213 INFO L225 Difference]: With dead ends: 460 [2021-08-06 19:35:39,213 INFO L226 Difference]: Without dead ends: 460 [2021-08-06 19:35:39,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:35:39,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-08-06 19:35:39,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 407. [2021-08-06 19:35:39,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.2660098522167487) internal successors, (920), 406 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 920 transitions. [2021-08-06 19:35:39,217 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 920 transitions. Word has length 18 [2021-08-06 19:35:39,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:39,217 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 920 transitions. [2021-08-06 19:35:39,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 920 transitions. [2021-08-06 19:35:39,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:35:39,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:39,218 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:39,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 19:35:39,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 19:35:39,419 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:39,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:39,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1068382862, now seen corresponding path program 100 times [2021-08-06 19:35:39,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:39,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147924712] [2021-08-06 19:35:39,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:39,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:39,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:39,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147924712] [2021-08-06 19:35:39,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147924712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:39,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176523516] [2021-08-06 19:35:39,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:35:39,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:39,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:39,564 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:39,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 19:35:40,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:35:40,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:40,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:35:40,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:40,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:35:40,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:35:42,112 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:42,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176523516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:42,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:42,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 19:35:42,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508348914] [2021-08-06 19:35:42,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:35:42,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:42,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:35:42,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:35:42,114 INFO L87 Difference]: Start difference. First operand 407 states and 920 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:42,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:42,422 INFO L93 Difference]: Finished difference Result 461 states and 1016 transitions. [2021-08-06 19:35:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:35:42,423 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:35:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:42,423 INFO L225 Difference]: With dead ends: 461 [2021-08-06 19:35:42,424 INFO L226 Difference]: Without dead ends: 442 [2021-08-06 19:35:42,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:35:42,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-08-06 19:35:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 422. [2021-08-06 19:35:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.2779097387173395) internal successors, (959), 421 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 959 transitions. [2021-08-06 19:35:42,428 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 959 transitions. Word has length 19 [2021-08-06 19:35:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:42,428 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 959 transitions. [2021-08-06 19:35:42,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 959 transitions. [2021-08-06 19:35:42,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:35:42,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:42,429 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:42,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 19:35:42,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 19:35:42,629 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1058550062, now seen corresponding path program 101 times [2021-08-06 19:35:42,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:42,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173333674] [2021-08-06 19:35:42,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:42,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:42,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:42,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173333674] [2021-08-06 19:35:42,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173333674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:42,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042476084] [2021-08-06 19:35:42,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:35:42,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:42,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:42,753 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:42,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 19:35:43,666 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:35:43,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:43,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:35:43,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:44,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:35:44,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:35:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:45,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042476084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:45,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:45,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:35:45,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393088572] [2021-08-06 19:35:45,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:35:45,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:45,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:35:45,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:35:45,171 INFO L87 Difference]: Start difference. First operand 422 states and 959 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:45,465 INFO L93 Difference]: Finished difference Result 479 states and 1061 transitions. [2021-08-06 19:35:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:35:45,465 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:35:45,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:45,466 INFO L225 Difference]: With dead ends: 479 [2021-08-06 19:35:45,466 INFO L226 Difference]: Without dead ends: 468 [2021-08-06 19:35:45,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:35:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-06 19:35:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 438. [2021-08-06 19:35:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.2997711670480547) internal successors, (1005), 437 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1005 transitions. [2021-08-06 19:35:45,471 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1005 transitions. Word has length 19 [2021-08-06 19:35:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:45,471 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1005 transitions. [2021-08-06 19:35:45,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1005 transitions. [2021-08-06 19:35:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:35:45,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:45,471 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:45,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:45,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:45,672 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:45,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1883874974, now seen corresponding path program 102 times [2021-08-06 19:35:45,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:45,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529164172] [2021-08-06 19:35:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:45,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:45,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:45,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529164172] [2021-08-06 19:35:45,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529164172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:45,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267713192] [2021-08-06 19:35:45,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:35:45,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:45,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:45,796 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:45,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 19:35:46,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:35:46,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:46,709 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:35:46,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:47,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:35:47,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:35:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:48,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267713192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:48,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:48,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:35:48,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287051490] [2021-08-06 19:35:48,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:35:48,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:48,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:35:48,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:35:48,380 INFO L87 Difference]: Start difference. First operand 438 states and 1005 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:48,660 INFO L93 Difference]: Finished difference Result 501 states and 1128 transitions. [2021-08-06 19:35:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:35:48,660 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:35:48,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:48,661 INFO L225 Difference]: With dead ends: 501 [2021-08-06 19:35:48,661 INFO L226 Difference]: Without dead ends: 490 [2021-08-06 19:35:48,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 293.2ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:35:48,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-08-06 19:35:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 460. [2021-08-06 19:35:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.320261437908497) internal successors, (1065), 459 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:48,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1065 transitions. [2021-08-06 19:35:48,667 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1065 transitions. Word has length 19 [2021-08-06 19:35:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:48,667 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1065 transitions. [2021-08-06 19:35:48,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1065 transitions. [2021-08-06 19:35:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:35:48,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:48,668 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:48,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:48,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:48,868 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:48,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:48,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1618939954, now seen corresponding path program 103 times [2021-08-06 19:35:48,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:48,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334539219] [2021-08-06 19:35:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:48,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:48,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:48,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334539219] [2021-08-06 19:35:48,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334539219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:48,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216935891] [2021-08-06 19:35:48,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:35:48,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:48,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:48,978 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:48,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 19:35:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:49,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:35:49,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:50,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:35:50,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:35:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:51,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216935891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:51,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:51,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-08-06 19:35:51,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402372913] [2021-08-06 19:35:51,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:35:51,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:51,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:35:51,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:35:51,422 INFO L87 Difference]: Start difference. First operand 460 states and 1065 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-08-06 19:35:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:51,636 INFO L93 Difference]: Finished difference Result 483 states and 1093 transitions. [2021-08-06 19:35:51,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:35:51,636 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 19 [2021-08-06 19:35:51,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:51,637 INFO L225 Difference]: With dead ends: 483 [2021-08-06 19:35:51,637 INFO L226 Difference]: Without dead ends: 471 [2021-08-06 19:35:51,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:35:51,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-08-06 19:35:51,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2021-08-06 19:35:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.315904139433551) internal successors, (1063), 459 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1063 transitions. [2021-08-06 19:35:51,644 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1063 transitions. Word has length 19 [2021-08-06 19:35:51,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:51,644 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1063 transitions. [2021-08-06 19:35:51,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-08-06 19:35:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1063 transitions. [2021-08-06 19:35:51,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:35:51,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:51,645 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:51,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:51,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-06 19:35:51,846 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:51,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:51,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1390229422, now seen corresponding path program 104 times [2021-08-06 19:35:51,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:51,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842548284] [2021-08-06 19:35:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:51,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:51,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:51,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842548284] [2021-08-06 19:35:51,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842548284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:51,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851348661] [2021-08-06 19:35:51,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:35:51,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:51,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:51,987 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:51,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 19:35:52,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:35:52,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:52,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:35:52,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:53,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:35:53,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:35:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:54,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851348661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:54,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:54,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:35:54,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173332604] [2021-08-06 19:35:54,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:35:54,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:54,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:35:54,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:35:54,405 INFO L87 Difference]: Start difference. First operand 460 states and 1063 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:54,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:54,673 INFO L93 Difference]: Finished difference Result 533 states and 1210 transitions. [2021-08-06 19:35:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:35:54,673 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:35:54,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:54,674 INFO L225 Difference]: With dead ends: 533 [2021-08-06 19:35:54,674 INFO L226 Difference]: Without dead ends: 521 [2021-08-06 19:35:54,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:35:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-08-06 19:35:54,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 490. [2021-08-06 19:35:54,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.3374233128834354) internal successors, (1143), 489 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:54,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1143 transitions. [2021-08-06 19:35:54,680 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1143 transitions. Word has length 19 [2021-08-06 19:35:54,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:54,680 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1143 transitions. [2021-08-06 19:35:54,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:54,680 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1143 transitions. [2021-08-06 19:35:54,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:35:54,681 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:54,681 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:54,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 19:35:54,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 19:35:54,881 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:54,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1637398980, now seen corresponding path program 105 times [2021-08-06 19:35:54,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:54,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941871996] [2021-08-06 19:35:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:54,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:35:54,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:54,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941871996] [2021-08-06 19:35:54,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941871996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:54,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616562683] [2021-08-06 19:35:54,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:35:54,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:54,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:54,987 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:54,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 19:35:55,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:35:55,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:55,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:35:55,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:56,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:35:56,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:35:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:57,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616562683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:57,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:35:57,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-08-06 19:35:57,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113831436] [2021-08-06 19:35:57,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:35:57,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:35:57,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:35:57,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:35:57,951 INFO L87 Difference]: Start difference. First operand 490 states and 1143 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-08-06 19:35:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:35:58,201 INFO L93 Difference]: Finished difference Result 510 states and 1168 transitions. [2021-08-06 19:35:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:35:58,205 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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 19 [2021-08-06 19:35:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:35:58,205 INFO L225 Difference]: With dead ends: 510 [2021-08-06 19:35:58,205 INFO L226 Difference]: Without dead ends: 498 [2021-08-06 19:35:58,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:35:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-08-06 19:35:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 490. [2021-08-06 19:35:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.3353783231083844) internal successors, (1142), 489 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:35:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1142 transitions. [2021-08-06 19:35:58,210 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1142 transitions. Word has length 19 [2021-08-06 19:35:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:35:58,211 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1142 transitions. [2021-08-06 19:35:58,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) 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) [2021-08-06 19:35:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1142 transitions. [2021-08-06 19:35:58,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:35:58,211 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:35:58,211 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:35:58,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-06 19:35:58,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:58,412 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:35:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:35:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash -191749406, now seen corresponding path program 106 times [2021-08-06 19:35:58,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:35:58,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783583335] [2021-08-06 19:35:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:35:58,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:35:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:35:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:35:58,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:35:58,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783583335] [2021-08-06 19:35:58,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783583335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:35:58,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529299830] [2021-08-06 19:35:58,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:35:58,534 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:35:58,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:35:58,534 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:35:58,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 19:35:59,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:35:59,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:35:59,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:35:59,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:35:59,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:35:59,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:36:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:00,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529299830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:00,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:00,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:36:00,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332777712] [2021-08-06 19:36:00,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:00,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:00,584 INFO L87 Difference]: Start difference. First operand 490 states and 1142 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:00,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:00,804 INFO L93 Difference]: Finished difference Result 555 states and 1276 transitions. [2021-08-06 19:36:00,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:36:00,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:36:00,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:00,806 INFO L225 Difference]: With dead ends: 555 [2021-08-06 19:36:00,806 INFO L226 Difference]: Without dead ends: 544 [2021-08-06 19:36:00,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:36:00,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-08-06 19:36:00,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 521. [2021-08-06 19:36:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.3461538461538463) internal successors, (1220), 520 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1220 transitions. [2021-08-06 19:36:00,811 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1220 transitions. Word has length 19 [2021-08-06 19:36:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:00,811 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 1220 transitions. [2021-08-06 19:36:00,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:00,811 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1220 transitions. [2021-08-06 19:36:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:36:00,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:00,812 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:00,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:01,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:01,012 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash -793827666, now seen corresponding path program 107 times [2021-08-06 19:36:01,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:01,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234490426] [2021-08-06 19:36:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:01,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:01,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:01,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234490426] [2021-08-06 19:36:01,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234490426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:01,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658071661] [2021-08-06 19:36:01,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:36:01,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:01,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:01,128 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:01,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 19:36:02,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:36:02,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:02,116 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:36:02,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:02,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:02,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:36:02,692 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 55.0 percent of original size [2021-08-06 19:36:02,918 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 55.0 percent of original size [2021-08-06 19:36:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:03,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658071661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:03,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:03,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:36:03,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552342125] [2021-08-06 19:36:03,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:03,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:03,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:03,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:03,128 INFO L87 Difference]: Start difference. First operand 521 states and 1220 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) 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) [2021-08-06 19:36:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:03,411 INFO L93 Difference]: Finished difference Result 542 states and 1245 transitions. [2021-08-06 19:36:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:36:03,412 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) 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 19 [2021-08-06 19:36:03,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:03,412 INFO L225 Difference]: With dead ends: 542 [2021-08-06 19:36:03,413 INFO L226 Difference]: Without dead ends: 528 [2021-08-06 19:36:03,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:36:03,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-08-06 19:36:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 521. [2021-08-06 19:36:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.3442307692307693) internal successors, (1219), 520 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1219 transitions. [2021-08-06 19:36:03,418 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1219 transitions. Word has length 19 [2021-08-06 19:36:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:03,418 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 1219 transitions. [2021-08-06 19:36:03,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) 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) [2021-08-06 19:36:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1219 transitions. [2021-08-06 19:36:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:36:03,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:03,418 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:03,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:03,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-06 19:36:03,619 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:03,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:03,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1988452818, now seen corresponding path program 108 times [2021-08-06 19:36:03,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:03,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471012312] [2021-08-06 19:36:03,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:03,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:03,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:03,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471012312] [2021-08-06 19:36:03,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471012312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:03,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221299005] [2021-08-06 19:36:03,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:36:03,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:03,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:03,756 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:03,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 19:36:04,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:36:04,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:04,776 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:36:04,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:05,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:05,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:36:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:06,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221299005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:06,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:06,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:36:06,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320290051] [2021-08-06 19:36:06,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:06,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:06,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:06,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:06,193 INFO L87 Difference]: Start difference. First operand 521 states and 1219 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:06,428 INFO L93 Difference]: Finished difference Result 601 states and 1384 transitions. [2021-08-06 19:36:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:36:06,428 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:36:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:06,429 INFO L225 Difference]: With dead ends: 601 [2021-08-06 19:36:06,429 INFO L226 Difference]: Without dead ends: 589 [2021-08-06 19:36:06,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 295.6ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:36:06,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-08-06 19:36:06,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 566. [2021-08-06 19:36:06,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 2.3504424778761064) internal successors, (1328), 565 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:06,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1328 transitions. [2021-08-06 19:36:06,435 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1328 transitions. Word has length 19 [2021-08-06 19:36:06,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:06,435 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 1328 transitions. [2021-08-06 19:36:06,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:06,436 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1328 transitions. [2021-08-06 19:36:06,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:36:06,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:06,436 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:06,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 19:36:06,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 19:36:06,637 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:06,637 INFO L82 PathProgramCache]: Analyzing trace with hash -22417246, now seen corresponding path program 109 times [2021-08-06 19:36:06,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:06,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621044872] [2021-08-06 19:36:06,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:06,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:06,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:06,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621044872] [2021-08-06 19:36:06,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621044872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:06,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105187215] [2021-08-06 19:36:06,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:36:06,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:06,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:06,786 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:06,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 19:36:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:07,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:36:07,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:08,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:08,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:36:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:09,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105187215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:09,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:09,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 19:36:09,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458581146] [2021-08-06 19:36:09,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:36:09,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:09,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:36:09,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:36:09,261 INFO L87 Difference]: Start difference. First operand 566 states and 1328 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:09,522 INFO L93 Difference]: Finished difference Result 592 states and 1361 transitions. [2021-08-06 19:36:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:36:09,523 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:36:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:09,524 INFO L225 Difference]: With dead ends: 592 [2021-08-06 19:36:09,524 INFO L226 Difference]: Without dead ends: 578 [2021-08-06 19:36:09,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:36:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-08-06 19:36:09,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 566. [2021-08-06 19:36:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 2.3469026548672565) internal successors, (1326), 565 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1326 transitions. [2021-08-06 19:36:09,530 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1326 transitions. Word has length 19 [2021-08-06 19:36:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:09,530 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 1326 transitions. [2021-08-06 19:36:09,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1326 transitions. [2021-08-06 19:36:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:36:09,530 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:09,530 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:09,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-06 19:36:09,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 19:36:09,732 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1526083708, now seen corresponding path program 110 times [2021-08-06 19:36:09,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:09,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424914616] [2021-08-06 19:36:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:09,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:09,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:09,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424914616] [2021-08-06 19:36:09,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424914616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:09,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806502336] [2021-08-06 19:36:09,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:36:09,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:09,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:09,861 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:09,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 19:36:10,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:36:10,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:10,945 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:36:10,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:11,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:11,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:36:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:12,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806502336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:12,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:12,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:36:12,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935287266] [2021-08-06 19:36:12,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:12,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:12,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:12,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:12,815 INFO L87 Difference]: Start difference. First operand 566 states and 1326 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:13,082 INFO L93 Difference]: Finished difference Result 589 states and 1357 transitions. [2021-08-06 19:36:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:36:13,082 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:36:13,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:13,083 INFO L225 Difference]: With dead ends: 589 [2021-08-06 19:36:13,083 INFO L226 Difference]: Without dead ends: 577 [2021-08-06 19:36:13,084 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:36:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-06 19:36:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 566. [2021-08-06 19:36:13,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 2.3451327433628317) internal successors, (1325), 565 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:13,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1325 transitions. [2021-08-06 19:36:13,089 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1325 transitions. Word has length 19 [2021-08-06 19:36:13,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:13,090 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 1325 transitions. [2021-08-06 19:36:13,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:13,090 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1325 transitions. [2021-08-06 19:36:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:36:13,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:13,090 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:13,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:13,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 19:36:13,291 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:13,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:13,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1851683742, now seen corresponding path program 111 times [2021-08-06 19:36:13,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:13,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661678819] [2021-08-06 19:36:13,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:13,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:13,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:13,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661678819] [2021-08-06 19:36:13,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661678819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:13,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965476211] [2021-08-06 19:36:13,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:36:13,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:13,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:13,428 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:13,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 19:36:14,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:36:14,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:14,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:36:14,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:14,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:14,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:36:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:15,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965476211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:15,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:15,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:36:15,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443737915] [2021-08-06 19:36:15,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:15,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:15,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:15,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:15,574 INFO L87 Difference]: Start difference. First operand 566 states and 1325 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:15,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:15,813 INFO L93 Difference]: Finished difference Result 684 states and 1562 transitions. [2021-08-06 19:36:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:36:15,813 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:36:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:15,814 INFO L225 Difference]: With dead ends: 684 [2021-08-06 19:36:15,814 INFO L226 Difference]: Without dead ends: 673 [2021-08-06 19:36:15,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 275.3ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:36:15,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-08-06 19:36:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 654. [2021-08-06 19:36:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.32312404287902) internal successors, (1517), 653 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) [2021-08-06 19:36:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1517 transitions. [2021-08-06 19:36:15,821 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1517 transitions. Word has length 19 [2021-08-06 19:36:15,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:15,821 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1517 transitions. [2021-08-06 19:36:15,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:15,821 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1517 transitions. [2021-08-06 19:36:15,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:36:15,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:15,822 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:15,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:16,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:16,041 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:16,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1878498002, now seen corresponding path program 112 times [2021-08-06 19:36:16,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:16,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182072178] [2021-08-06 19:36:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:16,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:16,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:16,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182072178] [2021-08-06 19:36:16,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182072178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:16,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890719058] [2021-08-06 19:36:16,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:36:16,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:16,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:16,180 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:16,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 19:36:17,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:36:17,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:17,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:36:17,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:17,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:17,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:36:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:19,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890719058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:19,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:19,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 19:36:19,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764590750] [2021-08-06 19:36:19,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:36:19,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:36:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:36:19,396 INFO L87 Difference]: Start difference. First operand 654 states and 1517 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:19,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:19,806 INFO L93 Difference]: Finished difference Result 693 states and 1569 transitions. [2021-08-06 19:36:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:36:19,806 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:36:19,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:19,807 INFO L225 Difference]: With dead ends: 693 [2021-08-06 19:36:19,808 INFO L226 Difference]: Without dead ends: 676 [2021-08-06 19:36:19,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:36:19,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-08-06 19:36:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 654. [2021-08-06 19:36:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.3169984686064318) internal successors, (1513), 653 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:19,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1513 transitions. [2021-08-06 19:36:19,814 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1513 transitions. Word has length 19 [2021-08-06 19:36:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:19,814 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1513 transitions. [2021-08-06 19:36:19,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1513 transitions. [2021-08-06 19:36:19,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:36:19,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:19,815 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:19,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 19:36:20,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:20,034 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:20,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:20,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1369054030, now seen corresponding path program 113 times [2021-08-06 19:36:20,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:20,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169490277] [2021-08-06 19:36:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:20,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:20,161 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:20,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:20,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169490277] [2021-08-06 19:36:20,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169490277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:20,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923547895] [2021-08-06 19:36:20,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:36:20,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:20,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:20,162 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:20,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 19:36:21,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:36:21,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:21,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:36:21,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:21,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:21,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:36:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:22,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923547895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:22,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:22,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 19:36:22,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332948232] [2021-08-06 19:36:22,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:36:22,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:22,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:36:22,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:36:22,661 INFO L87 Difference]: Start difference. First operand 654 states and 1513 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:22,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:22,977 INFO L93 Difference]: Finished difference Result 682 states and 1551 transitions. [2021-08-06 19:36:22,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:36:22,977 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:36:22,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:22,978 INFO L225 Difference]: With dead ends: 682 [2021-08-06 19:36:22,978 INFO L226 Difference]: Without dead ends: 670 [2021-08-06 19:36:22,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:36:22,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-08-06 19:36:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 654. [2021-08-06 19:36:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.315467075038285) internal successors, (1512), 653 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1512 transitions. [2021-08-06 19:36:22,985 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1512 transitions. Word has length 19 [2021-08-06 19:36:22,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:22,985 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1512 transitions. [2021-08-06 19:36:22,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1512 transitions. [2021-08-06 19:36:22,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:36:22,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:22,986 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:23,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-06 19:36:23,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-06 19:36:23,186 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:23,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:23,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1906809682, now seen corresponding path program 114 times [2021-08-06 19:36:23,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:23,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827068109] [2021-08-06 19:36:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:23,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:23,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:23,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827068109] [2021-08-06 19:36:23,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827068109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:23,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231626164] [2021-08-06 19:36:23,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:36:23,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:23,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:23,305 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:23,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 19:36:24,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:36:24,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:24,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-06 19:36:24,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:24,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:24,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 63 treesize of output 211 [2021-08-06 19:36:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:25,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231626164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:25,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:25,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:36:25,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427586455] [2021-08-06 19:36:25,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:25,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:25,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:25,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:25,839 INFO L87 Difference]: Start difference. First operand 654 states and 1512 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:26,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:26,162 INFO L93 Difference]: Finished difference Result 752 states and 1711 transitions. [2021-08-06 19:36:26,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:36:26,163 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:36:26,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:26,164 INFO L225 Difference]: With dead ends: 752 [2021-08-06 19:36:26,164 INFO L226 Difference]: Without dead ends: 742 [2021-08-06 19:36:26,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 275.4ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:36:26,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-08-06 19:36:26,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 730. [2021-08-06 19:36:26,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.307270233196159) internal successors, (1682), 729 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1682 transitions. [2021-08-06 19:36:26,172 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1682 transitions. Word has length 19 [2021-08-06 19:36:26,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:26,172 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1682 transitions. [2021-08-06 19:36:26,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:26,172 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1682 transitions. [2021-08-06 19:36:26,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:36:26,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:26,173 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:26,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:26,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:26,385 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1682152507, now seen corresponding path program 115 times [2021-08-06 19:36:26,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:26,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156509115] [2021-08-06 19:36:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:26,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:26,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:26,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156509115] [2021-08-06 19:36:26,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156509115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:26,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409633665] [2021-08-06 19:36:26,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:36:26,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:26,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:26,547 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:26,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 19:36:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:27,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:36:27,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:28,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:28,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:36:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:28,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409633665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:28,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:28,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 19:36:28,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784788069] [2021-08-06 19:36:28,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:36:28,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:28,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:36:28,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:36:28,886 INFO L87 Difference]: Start difference. First operand 730 states and 1682 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:29,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:29,341 INFO L93 Difference]: Finished difference Result 772 states and 1753 transitions. [2021-08-06 19:36:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:36:29,342 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:36:29,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:29,343 INFO L225 Difference]: With dead ends: 772 [2021-08-06 19:36:29,343 INFO L226 Difference]: Without dead ends: 765 [2021-08-06 19:36:29,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 440.2ms TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:36:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-08-06 19:36:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 733. [2021-08-06 19:36:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 2.3060109289617485) internal successors, (1688), 732 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1688 transitions. [2021-08-06 19:36:29,351 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1688 transitions. Word has length 20 [2021-08-06 19:36:29,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:29,351 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 1688 transitions. [2021-08-06 19:36:29,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:29,351 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1688 transitions. [2021-08-06 19:36:29,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:36:29,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:29,352 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:29,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:29,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:29,565 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:29,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1797322677, now seen corresponding path program 116 times [2021-08-06 19:36:29,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:29,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21770608] [2021-08-06 19:36:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:29,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:29,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:29,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21770608] [2021-08-06 19:36:29,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21770608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:29,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310554797] [2021-08-06 19:36:29,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:36:29,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:29,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:29,680 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:29,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 19:36:30,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:36:30,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:30,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:36:30,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:31,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:31,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:36:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:32,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310554797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:32,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:32,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:36:32,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166602175] [2021-08-06 19:36:32,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:32,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:32,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:32,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:32,563 INFO L87 Difference]: Start difference. First operand 733 states and 1688 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:32,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:32,842 INFO L93 Difference]: Finished difference Result 776 states and 1753 transitions. [2021-08-06 19:36:32,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:36:32,842 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:36:32,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:32,843 INFO L225 Difference]: With dead ends: 776 [2021-08-06 19:36:32,843 INFO L226 Difference]: Without dead ends: 771 [2021-08-06 19:36:32,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:36:32,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-08-06 19:36:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 735. [2021-08-06 19:36:32,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.3065395095367847) internal successors, (1693), 734 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:32,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1693 transitions. [2021-08-06 19:36:32,850 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1693 transitions. Word has length 20 [2021-08-06 19:36:32,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:32,851 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 1693 transitions. [2021-08-06 19:36:32,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:32,851 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1693 transitions. [2021-08-06 19:36:32,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:36:32,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:32,851 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:32,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:33,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-08-06 19:36:33,052 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:33,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:33,052 INFO L82 PathProgramCache]: Analyzing trace with hash -754834284, now seen corresponding path program 117 times [2021-08-06 19:36:33,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:33,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660687541] [2021-08-06 19:36:33,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:33,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:33,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:33,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660687541] [2021-08-06 19:36:33,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660687541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:33,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508714157] [2021-08-06 19:36:33,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:36:33,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:33,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:33,123 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:33,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 19:36:34,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:36:34,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:34,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:36:34,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:34,417 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:36:34,417 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:36:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:34,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508714157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:34,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:34,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:36:34,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567314970] [2021-08-06 19:36:34,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:36:34,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:34,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:36:34,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:36:34,437 INFO L87 Difference]: Start difference. First operand 735 states and 1693 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:36:34,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:34,489 INFO L93 Difference]: Finished difference Result 852 states and 1854 transitions. [2021-08-06 19:36:34,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:36:34,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 20 [2021-08-06 19:36:34,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:34,491 INFO L225 Difference]: With dead ends: 852 [2021-08-06 19:36:34,491 INFO L226 Difference]: Without dead ends: 852 [2021-08-06 19:36:34,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:36:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-08-06 19:36:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 743. [2021-08-06 19:36:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.31266846361186) internal successors, (1716), 742 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1716 transitions. [2021-08-06 19:36:34,499 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1716 transitions. Word has length 20 [2021-08-06 19:36:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:34,499 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 1716 transitions. [2021-08-06 19:36:34,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:36:34,499 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1716 transitions. [2021-08-06 19:36:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:36:34,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:34,499 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:34,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-06 19:36:34,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:34,700 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:34,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:34,700 INFO L82 PathProgramCache]: Analyzing trace with hash 776459777, now seen corresponding path program 118 times [2021-08-06 19:36:34,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:34,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527578297] [2021-08-06 19:36:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:34,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:34,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:34,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527578297] [2021-08-06 19:36:34,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527578297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:34,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810385298] [2021-08-06 19:36:34,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:36:34,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:34,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:34,816 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:34,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 19:36:36,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:36:36,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:36,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:36:36,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:36,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:36,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:36:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:37,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810385298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:37,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:37,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:36:37,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640038648] [2021-08-06 19:36:37,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:37,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:37,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:37,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:37,597 INFO L87 Difference]: Start difference. First operand 743 states and 1716 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:37,892 INFO L93 Difference]: Finished difference Result 789 states and 1796 transitions. [2021-08-06 19:36:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:36:37,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:36:37,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:37,902 INFO L225 Difference]: With dead ends: 789 [2021-08-06 19:36:37,902 INFO L226 Difference]: Without dead ends: 785 [2021-08-06 19:36:37,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 295.8ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:36:37,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-08-06 19:36:37,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 748. [2021-08-06 19:36:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 2.317269076305221) internal successors, (1731), 747 states have internal predecessors, (1731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1731 transitions. [2021-08-06 19:36:37,910 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1731 transitions. Word has length 20 [2021-08-06 19:36:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:37,910 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 1731 transitions. [2021-08-06 19:36:37,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:37,910 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1731 transitions. [2021-08-06 19:36:37,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:36:37,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:37,911 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:37,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:38,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:38,117 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1030994686, now seen corresponding path program 119 times [2021-08-06 19:36:38,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:38,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914568408] [2021-08-06 19:36:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:38,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:38,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:38,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914568408] [2021-08-06 19:36:38,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914568408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:38,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990706417] [2021-08-06 19:36:38,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:36:38,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:38,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:38,189 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:38,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 19:36:39,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:36:39,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:39,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:36:39,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:39,525 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:36:39,526 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:36:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:39,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990706417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:39,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:39,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:36:39,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192958566] [2021-08-06 19:36:39,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:36:39,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:39,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:36:39,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:36:39,547 INFO L87 Difference]: Start difference. First operand 748 states and 1731 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:36:39,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:39,617 INFO L93 Difference]: Finished difference Result 907 states and 1974 transitions. [2021-08-06 19:36:39,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:36:39,617 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 20 [2021-08-06 19:36:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:39,619 INFO L225 Difference]: With dead ends: 907 [2021-08-06 19:36:39,619 INFO L226 Difference]: Without dead ends: 907 [2021-08-06 19:36:39,619 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:36:39,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-08-06 19:36:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 742. [2021-08-06 19:36:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.310391363022942) internal successors, (1712), 741 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1712 transitions. [2021-08-06 19:36:39,627 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1712 transitions. Word has length 20 [2021-08-06 19:36:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:39,627 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 1712 transitions. [2021-08-06 19:36:39,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:36:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1712 transitions. [2021-08-06 19:36:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:36:39,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:39,628 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:39,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:39,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 19:36:39,842 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:39,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1023629335, now seen corresponding path program 120 times [2021-08-06 19:36:39,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:39,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818175897] [2021-08-06 19:36:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:39,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:39,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:39,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818175897] [2021-08-06 19:36:39,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818175897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:39,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661044767] [2021-08-06 19:36:39,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:36:39,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:39,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:39,944 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:39,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 19:36:41,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:36:41,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:41,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-06 19:36:41,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:41,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:41,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 82 treesize of output 228 [2021-08-06 19:36:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:42,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661044767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:42,958 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:42,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-08-06 19:36:42,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676120017] [2021-08-06 19:36:42,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:36:42,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:36:42,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:36:42,959 INFO L87 Difference]: Start difference. First operand 742 states and 1712 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:43,215 INFO L93 Difference]: Finished difference Result 758 states and 1737 transitions. [2021-08-06 19:36:43,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:36:43,215 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:36:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:43,216 INFO L225 Difference]: With dead ends: 758 [2021-08-06 19:36:43,216 INFO L226 Difference]: Without dead ends: 750 [2021-08-06 19:36:43,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:36:43,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-08-06 19:36:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 739. [2021-08-06 19:36:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 2.306233062330623) internal successors, (1702), 738 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1702 transitions. [2021-08-06 19:36:43,223 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1702 transitions. Word has length 20 [2021-08-06 19:36:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:43,224 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 1702 transitions. [2021-08-06 19:36:43,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:43,224 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1702 transitions. [2021-08-06 19:36:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:36:43,224 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:43,224 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:43,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-06 19:36:43,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:43,425 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:43,425 INFO L82 PathProgramCache]: Analyzing trace with hash -805519051, now seen corresponding path program 121 times [2021-08-06 19:36:43,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:43,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023875808] [2021-08-06 19:36:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:43,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:43,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:43,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023875808] [2021-08-06 19:36:43,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023875808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:43,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455389537] [2021-08-06 19:36:43,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:36:43,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:43,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:43,546 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:43,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 19:36:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:44,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:36:44,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:45,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:45,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:36:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:46,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455389537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:46,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:46,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:36:46,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834064576] [2021-08-06 19:36:46,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:46,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:46,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:46,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:46,323 INFO L87 Difference]: Start difference. First operand 739 states and 1702 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:46,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:46,612 INFO L93 Difference]: Finished difference Result 777 states and 1769 transitions. [2021-08-06 19:36:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:36:46,612 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:36:46,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:46,613 INFO L225 Difference]: With dead ends: 777 [2021-08-06 19:36:46,613 INFO L226 Difference]: Without dead ends: 772 [2021-08-06 19:36:46,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:36:46,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-08-06 19:36:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 742. [2021-08-06 19:36:46,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.3076923076923075) internal successors, (1710), 741 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:46,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1710 transitions. [2021-08-06 19:36:46,621 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1710 transitions. Word has length 20 [2021-08-06 19:36:46,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:46,621 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 1710 transitions. [2021-08-06 19:36:46,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:46,621 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1710 transitions. [2021-08-06 19:36:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:36:46,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:46,622 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:46,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:46,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 19:36:46,841 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash 937291284, now seen corresponding path program 122 times [2021-08-06 19:36:46,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:46,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106988486] [2021-08-06 19:36:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:46,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:46,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:46,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106988486] [2021-08-06 19:36:46,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106988486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:46,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498450156] [2021-08-06 19:36:46,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:36:46,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:46,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:46,897 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:46,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 19:36:48,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:36:48,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:48,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:36:48,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:48,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:36:48,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:36:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:48,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498450156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:48,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:48,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:36:48,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442148964] [2021-08-06 19:36:48,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:36:48,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:48,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:36:48,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:36:48,283 INFO L87 Difference]: Start difference. First operand 742 states and 1710 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:36:48,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:48,326 INFO L93 Difference]: Finished difference Result 830 states and 1829 transitions. [2021-08-06 19:36:48,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:36:48,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 20 [2021-08-06 19:36:48,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:48,327 INFO L225 Difference]: With dead ends: 830 [2021-08-06 19:36:48,327 INFO L226 Difference]: Without dead ends: 830 [2021-08-06 19:36:48,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:36:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-06 19:36:48,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 758. [2021-08-06 19:36:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.3077939233817704) internal successors, (1747), 757 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1747 transitions. [2021-08-06 19:36:48,335 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1747 transitions. Word has length 20 [2021-08-06 19:36:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:48,335 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 1747 transitions. [2021-08-06 19:36:48,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:36:48,336 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1747 transitions. [2021-08-06 19:36:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:36:48,336 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:48,336 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:48,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:48,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 19:36:48,537 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1681993782, now seen corresponding path program 123 times [2021-08-06 19:36:48,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:48,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936964026] [2021-08-06 19:36:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:48,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:48,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:48,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936964026] [2021-08-06 19:36:48,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936964026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:48,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694770628] [2021-08-06 19:36:48,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:36:48,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:48,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:48,601 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:48,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 19:36:49,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:36:49,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:36:49,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:49,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:36:49,998 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:36:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:50,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694770628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:50,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:50,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:36:50,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191956426] [2021-08-06 19:36:50,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:36:50,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:50,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:36:50,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:36:50,019 INFO L87 Difference]: Start difference. First operand 758 states and 1747 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:36:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:50,098 INFO L93 Difference]: Finished difference Result 874 states and 1910 transitions. [2021-08-06 19:36:50,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:36:50,098 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 20 [2021-08-06 19:36:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:50,100 INFO L225 Difference]: With dead ends: 874 [2021-08-06 19:36:50,100 INFO L226 Difference]: Without dead ends: 874 [2021-08-06 19:36:50,100 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:36:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-08-06 19:36:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 762. [2021-08-06 19:36:50,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.3061760840998686) internal successors, (1755), 761 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:50,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1755 transitions. [2021-08-06 19:36:50,111 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1755 transitions. Word has length 20 [2021-08-06 19:36:50,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:50,111 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 1755 transitions. [2021-08-06 19:36:50,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:36:50,111 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1755 transitions. [2021-08-06 19:36:50,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:36:50,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:50,112 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:50,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-06 19:36:50,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-06 19:36:50,329 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:50,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1002032556, now seen corresponding path program 124 times [2021-08-06 19:36:50,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:50,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050079290] [2021-08-06 19:36:50,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:50,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:50,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:50,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050079290] [2021-08-06 19:36:50,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050079290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:50,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480995523] [2021-08-06 19:36:50,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:36:50,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:50,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:50,399 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:50,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 19:36:51,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:36:51,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:51,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:36:51,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:51,857 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:36:51,858 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:36:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:51,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480995523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:51,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:51,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:36:51,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634789451] [2021-08-06 19:36:51,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:36:51,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:51,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:36:51,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:36:51,879 INFO L87 Difference]: Start difference. First operand 762 states and 1755 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:36:51,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:51,979 INFO L93 Difference]: Finished difference Result 1209 states and 2712 transitions. [2021-08-06 19:36:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:36:51,979 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 20 [2021-08-06 19:36:51,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:51,981 INFO L225 Difference]: With dead ends: 1209 [2021-08-06 19:36:51,981 INFO L226 Difference]: Without dead ends: 1209 [2021-08-06 19:36:51,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:36:51,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-08-06 19:36:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1086. [2021-08-06 19:36:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.313364055299539) internal successors, (2510), 1085 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:51,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2510 transitions. [2021-08-06 19:36:51,995 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2510 transitions. Word has length 20 [2021-08-06 19:36:51,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:51,995 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 2510 transitions. [2021-08-06 19:36:51,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:36:51,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2510 transitions. [2021-08-06 19:36:51,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:36:51,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:51,996 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:52,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:52,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:52,216 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:52,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:52,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1595859141, now seen corresponding path program 125 times [2021-08-06 19:36:52,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:52,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139225946] [2021-08-06 19:36:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:52,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:36:52,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:52,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139225946] [2021-08-06 19:36:52,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139225946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:52,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655449323] [2021-08-06 19:36:52,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:36:52,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:52,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:52,330 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:52,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 19:36:53,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:36:53,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:53,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:36:53,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:54,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:54,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:36:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:55,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655449323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:55,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:55,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-08-06 19:36:55,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424662656] [2021-08-06 19:36:55,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 19:36:55,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 19:36:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:36:55,474 INFO L87 Difference]: Start difference. First operand 1086 states and 2510 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:55,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:55,819 INFO L93 Difference]: Finished difference Result 1102 states and 2535 transitions. [2021-08-06 19:36:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:36:55,819 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:36:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:55,821 INFO L225 Difference]: With dead ends: 1102 [2021-08-06 19:36:55,821 INFO L226 Difference]: Without dead ends: 1094 [2021-08-06 19:36:55,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:36:55,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-08-06 19:36:55,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1084. [2021-08-06 19:36:55,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.312096029547553) internal successors, (2504), 1083 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2504 transitions. [2021-08-06 19:36:55,831 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2504 transitions. Word has length 20 [2021-08-06 19:36:55,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:55,831 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 2504 transitions. [2021-08-06 19:36:55,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:55,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2504 transitions. [2021-08-06 19:36:55,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:36:55,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:55,833 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:55,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-06 19:36:56,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:56,039 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:56,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:56,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1692744833, now seen corresponding path program 126 times [2021-08-06 19:36:56,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:56,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057585093] [2021-08-06 19:36:56,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:56,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:56,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:56,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057585093] [2021-08-06 19:36:56,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057585093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:56,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974279477] [2021-08-06 19:36:56,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:36:56,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:56,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:56,171 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:56,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 19:36:57,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:36:57,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:36:57,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:36:57,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:36:57,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:36:57,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:36:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:36:58,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974279477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:58,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:36:58,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:36:58,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924844972] [2021-08-06 19:36:58,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:36:58,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:36:58,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:36:58,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:36:58,828 INFO L87 Difference]: Start difference. First operand 1084 states and 2504 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:36:59,179 INFO L93 Difference]: Finished difference Result 1120 states and 2567 transitions. [2021-08-06 19:36:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:36:59,179 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:36:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:36:59,181 INFO L225 Difference]: With dead ends: 1120 [2021-08-06 19:36:59,181 INFO L226 Difference]: Without dead ends: 1116 [2021-08-06 19:36:59,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:36:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-08-06 19:36:59,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 1086. [2021-08-06 19:36:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.313364055299539) internal successors, (2510), 1085 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2510 transitions. [2021-08-06 19:36:59,192 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2510 transitions. Word has length 20 [2021-08-06 19:36:59,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:36:59,192 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 2510 transitions. [2021-08-06 19:36:59,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:36:59,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2510 transitions. [2021-08-06 19:36:59,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:36:59,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:36:59,193 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:36:59,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-06 19:36:59,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-06 19:36:59,394 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:36:59,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:36:59,394 INFO L82 PathProgramCache]: Analyzing trace with hash -114709630, now seen corresponding path program 127 times [2021-08-06 19:36:59,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:36:59,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803720342] [2021-08-06 19:36:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:36:59,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:36:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:36:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:36:59,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:36:59,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803720342] [2021-08-06 19:36:59,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803720342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:36:59,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178058557] [2021-08-06 19:36:59,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:36:59,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:36:59,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:36:59,454 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:36:59,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 19:37:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:00,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:00,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:00,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:00,953 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:00,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178058557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:00,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:00,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:37:00,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928824384] [2021-08-06 19:37:00,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:37:00,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:00,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:37:00,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:37:00,973 INFO L87 Difference]: Start difference. First operand 1086 states and 2510 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:37:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:01,028 INFO L93 Difference]: Finished difference Result 1155 states and 2569 transitions. [2021-08-06 19:37:01,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:37:01,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 20 [2021-08-06 19:37:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:01,029 INFO L225 Difference]: With dead ends: 1155 [2021-08-06 19:37:01,029 INFO L226 Difference]: Without dead ends: 1155 [2021-08-06 19:37:01,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:37:01,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-08-06 19:37:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1059. [2021-08-06 19:37:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 2.3015122873345937) internal successors, (2435), 1058 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:01,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 2435 transitions. [2021-08-06 19:37:01,040 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 2435 transitions. Word has length 20 [2021-08-06 19:37:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:01,040 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 2435 transitions. [2021-08-06 19:37:01,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:37:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 2435 transitions. [2021-08-06 19:37:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:01,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:01,041 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:01,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:01,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2021-08-06 19:37:01,242 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:01,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:01,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1496231328, now seen corresponding path program 128 times [2021-08-06 19:37:01,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:01,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493635130] [2021-08-06 19:37:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:01,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:01,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:01,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493635130] [2021-08-06 19:37:01,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493635130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:01,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647156078] [2021-08-06 19:37:01,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:37:01,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:01,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:01,306 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:01,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 19:37:02,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:37:02,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:02,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:02,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:02,756 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:02,756 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:02,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647156078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:02,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:02,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:37:02,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078247431] [2021-08-06 19:37:02,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:37:02,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:37:02,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:37:02,776 INFO L87 Difference]: Start difference. First operand 1059 states and 2435 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:37:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:02,857 INFO L93 Difference]: Finished difference Result 1212 states and 2676 transitions. [2021-08-06 19:37:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:37:02,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-08-06 19:37:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:02,859 INFO L225 Difference]: With dead ends: 1212 [2021-08-06 19:37:02,859 INFO L226 Difference]: Without dead ends: 1212 [2021-08-06 19:37:02,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:37:02,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-08-06 19:37:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 759. [2021-08-06 19:37:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.3034300791556728) internal successors, (1746), 758 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:02,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1746 transitions. [2021-08-06 19:37:02,867 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1746 transitions. Word has length 20 [2021-08-06 19:37:02,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:02,867 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 1746 transitions. [2021-08-06 19:37:02,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:37:02,868 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1746 transitions. [2021-08-06 19:37:02,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:02,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:02,868 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:02,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-06 19:37:03,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:03,069 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:03,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:03,069 INFO L82 PathProgramCache]: Analyzing trace with hash -104206526, now seen corresponding path program 129 times [2021-08-06 19:37:03,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:03,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78961891] [2021-08-06 19:37:03,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:03,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:03,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:03,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78961891] [2021-08-06 19:37:03,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78961891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:03,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555873111] [2021-08-06 19:37:03,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:37:03,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:03,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:03,135 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:03,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 19:37:04,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:37:04,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:04,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:04,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:04,583 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:04,583 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:04,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555873111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:04,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:04,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:37:04,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426842979] [2021-08-06 19:37:04,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:37:04,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:04,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:37:04,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:37:04,603 INFO L87 Difference]: Start difference. First operand 759 states and 1746 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:37:04,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:04,714 INFO L93 Difference]: Finished difference Result 1183 states and 2627 transitions. [2021-08-06 19:37:04,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:37:04,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-08-06 19:37:04,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:04,715 INFO L225 Difference]: With dead ends: 1183 [2021-08-06 19:37:04,715 INFO L226 Difference]: Without dead ends: 1183 [2021-08-06 19:37:04,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:37:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-08-06 19:37:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 974. [2021-08-06 19:37:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 2.2970195272353546) internal successors, (2235), 973 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:04,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 2235 transitions. [2021-08-06 19:37:04,725 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 2235 transitions. Word has length 20 [2021-08-06 19:37:04,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:04,725 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 2235 transitions. [2021-08-06 19:37:04,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:37:04,725 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 2235 transitions. [2021-08-06 19:37:04,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:04,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:04,726 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:04,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:04,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:04,947 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:04,948 INFO L82 PathProgramCache]: Analyzing trace with hash -636186891, now seen corresponding path program 130 times [2021-08-06 19:37:04,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:04,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440552780] [2021-08-06 19:37:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:04,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:05,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:05,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440552780] [2021-08-06 19:37:05,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440552780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:05,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526147423] [2021-08-06 19:37:05,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:37:05,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:05,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:05,065 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:05,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 19:37:06,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:37:06,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:06,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:37:06,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:06,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:37:06,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:37:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:07,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526147423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:07,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:07,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:37:07,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533249677] [2021-08-06 19:37:07,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:37:07,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:07,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:37:07,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:37:07,938 INFO L87 Difference]: Start difference. First operand 974 states and 2235 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:08,325 INFO L93 Difference]: Finished difference Result 1006 states and 2285 transitions. [2021-08-06 19:37:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:37:08,325 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:37:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:08,326 INFO L225 Difference]: With dead ends: 1006 [2021-08-06 19:37:08,326 INFO L226 Difference]: Without dead ends: 988 [2021-08-06 19:37:08,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 354.0ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:37:08,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-08-06 19:37:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 976. [2021-08-06 19:37:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 2.2964102564102564) internal successors, (2239), 975 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 2239 transitions. [2021-08-06 19:37:08,336 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 2239 transitions. Word has length 20 [2021-08-06 19:37:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:08,336 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 2239 transitions. [2021-08-06 19:37:08,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 2239 transitions. [2021-08-06 19:37:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:08,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:08,337 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:08,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:08,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-06 19:37:08,537 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:08,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1829513909, now seen corresponding path program 131 times [2021-08-06 19:37:08,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:08,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868134813] [2021-08-06 19:37:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:08,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:08,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:08,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868134813] [2021-08-06 19:37:08,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868134813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:08,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633944135] [2021-08-06 19:37:08,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:37:08,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:08,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:08,672 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:08,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 19:37:10,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:37:10,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:10,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:37:10,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:10,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:37:10,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:37:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:11,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633944135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:11,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:11,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:37:11,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107775298] [2021-08-06 19:37:11,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:37:11,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:11,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:37:11,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:37:11,880 INFO L87 Difference]: Start difference. First operand 976 states and 2239 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:12,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:12,158 INFO L93 Difference]: Finished difference Result 1000 states and 2278 transitions. [2021-08-06 19:37:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:37:12,158 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:37:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:12,160 INFO L225 Difference]: With dead ends: 1000 [2021-08-06 19:37:12,160 INFO L226 Difference]: Without dead ends: 995 [2021-08-06 19:37:12,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:37:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2021-08-06 19:37:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 974. [2021-08-06 19:37:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 2.2949640287769784) internal successors, (2233), 973 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 2233 transitions. [2021-08-06 19:37:12,170 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 2233 transitions. Word has length 20 [2021-08-06 19:37:12,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:12,170 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 2233 transitions. [2021-08-06 19:37:12,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 2233 transitions. [2021-08-06 19:37:12,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:12,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:12,171 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:12,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:12,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 19:37:12,377 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:12,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:12,377 INFO L82 PathProgramCache]: Analyzing trace with hash -722643052, now seen corresponding path program 132 times [2021-08-06 19:37:12,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:12,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925074987] [2021-08-06 19:37:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:12,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:12,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:12,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925074987] [2021-08-06 19:37:12,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925074987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:12,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121337887] [2021-08-06 19:37:12,441 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:37:12,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:12,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:12,442 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:12,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 19:37:13,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:37:13,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:13,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:13,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:13,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:13,932 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:13,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121337887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:13,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:13,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:37:13,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190698911] [2021-08-06 19:37:13,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:37:13,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:13,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:37:13,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:37:13,952 INFO L87 Difference]: Start difference. First operand 974 states and 2233 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:37:14,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:14,010 INFO L93 Difference]: Finished difference Result 1153 states and 2543 transitions. [2021-08-06 19:37:14,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:37:14,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 20 [2021-08-06 19:37:14,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:14,012 INFO L225 Difference]: With dead ends: 1153 [2021-08-06 19:37:14,012 INFO L226 Difference]: Without dead ends: 1153 [2021-08-06 19:37:14,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:37:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-08-06 19:37:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1017. [2021-08-06 19:37:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 2.298228346456693) internal successors, (2335), 1016 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 2335 transitions. [2021-08-06 19:37:14,022 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 2335 transitions. Word has length 20 [2021-08-06 19:37:14,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:14,022 INFO L470 AbstractCegarLoop]: Abstraction has 1017 states and 2335 transitions. [2021-08-06 19:37:14,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:37:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 2335 transitions. [2021-08-06 19:37:14,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:14,023 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:14,023 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:14,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-06 19:37:14,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 19:37:14,224 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash 22059446, now seen corresponding path program 133 times [2021-08-06 19:37:14,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:14,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744528140] [2021-08-06 19:37:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:14,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:14,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:14,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744528140] [2021-08-06 19:37:14,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744528140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:14,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216805139] [2021-08-06 19:37:14,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:37:14,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:14,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:14,293 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:14,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 19:37:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:15,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:15,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:15,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:15,813 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:15,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216805139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:15,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:15,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:37:15,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551090269] [2021-08-06 19:37:15,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:37:15,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:15,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:37:15,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:37:15,833 INFO L87 Difference]: Start difference. First operand 1017 states and 2335 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:37:15,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:15,900 INFO L93 Difference]: Finished difference Result 1169 states and 2565 transitions. [2021-08-06 19:37:15,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:37:15,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 20 [2021-08-06 19:37:15,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:15,901 INFO L225 Difference]: With dead ends: 1169 [2021-08-06 19:37:15,901 INFO L226 Difference]: Without dead ends: 1169 [2021-08-06 19:37:15,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:37:15,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-08-06 19:37:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1007. [2021-08-06 19:37:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 2.2912524850894633) internal successors, (2305), 1006 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 2305 transitions. [2021-08-06 19:37:15,912 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 2305 transitions. Word has length 20 [2021-08-06 19:37:15,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:15,912 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 2305 transitions. [2021-08-06 19:37:15,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:37:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 2305 transitions. [2021-08-06 19:37:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:15,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:15,913 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:15,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-06 19:37:16,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 19:37:16,113 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:16,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1633000404, now seen corresponding path program 134 times [2021-08-06 19:37:16,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:16,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681796324] [2021-08-06 19:37:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:16,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:16,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:16,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681796324] [2021-08-06 19:37:16,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681796324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:16,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290834540] [2021-08-06 19:37:16,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:37:16,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:16,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:16,182 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:16,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 19:37:17,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:37:17,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:17,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:17,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:17,718 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:17,718 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:17,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290834540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:17,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:17,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:37:17,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993157498] [2021-08-06 19:37:17,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:37:17,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:37:17,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:37:17,738 INFO L87 Difference]: Start difference. First operand 1007 states and 2305 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:37:17,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:17,790 INFO L93 Difference]: Finished difference Result 1825 states and 4083 transitions. [2021-08-06 19:37:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:37:17,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 20 [2021-08-06 19:37:17,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:17,792 INFO L225 Difference]: With dead ends: 1825 [2021-08-06 19:37:17,792 INFO L226 Difference]: Without dead ends: 1825 [2021-08-06 19:37:17,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:37:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-08-06 19:37:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1783. [2021-08-06 19:37:17,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 2.2581369248035914) internal successors, (4024), 1782 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 4024 transitions. [2021-08-06 19:37:17,811 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 4024 transitions. Word has length 20 [2021-08-06 19:37:17,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:17,811 INFO L470 AbstractCegarLoop]: Abstraction has 1783 states and 4024 transitions. [2021-08-06 19:37:17,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:37:17,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 4024 transitions. [2021-08-06 19:37:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:17,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:17,813 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:17,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2021-08-06 19:37:18,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:18,013 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:18,014 INFO L82 PathProgramCache]: Analyzing trace with hash 32562550, now seen corresponding path program 135 times [2021-08-06 19:37:18,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:18,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051226532] [2021-08-06 19:37:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:18,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:18,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:18,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051226532] [2021-08-06 19:37:18,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051226532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:18,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251934180] [2021-08-06 19:37:18,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:37:18,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:18,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:18,092 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:18,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 19:37:19,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:37:19,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:19,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:19,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:19,617 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:19,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:19,637 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:19,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251934180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:19,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:19,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:37:19,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010278275] [2021-08-06 19:37:19,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:37:19,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:19,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:37:19,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:37:19,638 INFO L87 Difference]: Start difference. First operand 1783 states and 4024 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:37:19,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:19,728 INFO L93 Difference]: Finished difference Result 1893 states and 4219 transitions. [2021-08-06 19:37:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:37:19,728 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-08-06 19:37:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:19,730 INFO L225 Difference]: With dead ends: 1893 [2021-08-06 19:37:19,730 INFO L226 Difference]: Without dead ends: 1893 [2021-08-06 19:37:19,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:37:19,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-08-06 19:37:19,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1798. [2021-08-06 19:37:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 2.2559821925431276) internal successors, (4054), 1797 states have internal predecessors, (4054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 4054 transitions. [2021-08-06 19:37:19,749 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 4054 transitions. Word has length 20 [2021-08-06 19:37:19,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:19,749 INFO L470 AbstractCegarLoop]: Abstraction has 1798 states and 4054 transitions. [2021-08-06 19:37:19,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:37:19,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 4054 transitions. [2021-08-06 19:37:19,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:19,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:19,751 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:19,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:19,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-06 19:37:19,952 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:19,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:19,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1958596628, now seen corresponding path program 136 times [2021-08-06 19:37:19,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:19,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527825477] [2021-08-06 19:37:19,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:19,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:20,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:20,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527825477] [2021-08-06 19:37:20,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527825477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:20,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857368269] [2021-08-06 19:37:20,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:37:20,036 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:20,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:20,036 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:20,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 19:37:21,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:37:21,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:21,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:21,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:21,568 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:21,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:21,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857368269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:21,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:21,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:37:21,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273903910] [2021-08-06 19:37:21,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:37:21,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:21,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:37:21,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:37:21,588 INFO L87 Difference]: Start difference. First operand 1798 states and 4054 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:37:21,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:21,738 INFO L93 Difference]: Finished difference Result 2495 states and 5474 transitions. [2021-08-06 19:37:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:37:21,738 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-08-06 19:37:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:21,741 INFO L225 Difference]: With dead ends: 2495 [2021-08-06 19:37:21,741 INFO L226 Difference]: Without dead ends: 2495 [2021-08-06 19:37:21,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:37:21,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-08-06 19:37:21,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2329. [2021-08-06 19:37:21,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 2328 states have (on average 2.2190721649484537) internal successors, (5166), 2328 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 5166 transitions. [2021-08-06 19:37:21,767 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 5166 transitions. Word has length 20 [2021-08-06 19:37:21,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:21,768 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 5166 transitions. [2021-08-06 19:37:21,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:37:21,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 5166 transitions. [2021-08-06 19:37:21,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:21,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:21,770 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:21,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-06 19:37:21,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-06 19:37:21,970 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:21,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1802699649, now seen corresponding path program 137 times [2021-08-06 19:37:21,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:21,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756380210] [2021-08-06 19:37:21,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:21,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:22,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:22,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756380210] [2021-08-06 19:37:22,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756380210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:22,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567737653] [2021-08-06 19:37:22,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:37:22,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:22,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:22,104 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:22,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 19:37:23,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:37:23,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:23,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:37:23,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:24,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:37:24,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:37:25,367 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:25,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567737653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:25,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:25,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 19:37:25,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572152130] [2021-08-06 19:37:25,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:37:25,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:25,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:37:25,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:37:25,367 INFO L87 Difference]: Start difference. First operand 2329 states and 5166 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:25,707 INFO L93 Difference]: Finished difference Result 2367 states and 5226 transitions. [2021-08-06 19:37:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:37:25,707 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:37:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:25,709 INFO L225 Difference]: With dead ends: 2367 [2021-08-06 19:37:25,710 INFO L226 Difference]: Without dead ends: 2359 [2021-08-06 19:37:25,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 374.0ms TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:37:25,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-08-06 19:37:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2326. [2021-08-06 19:37:25,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2325 states have (on average 2.2189247311827955) internal successors, (5159), 2325 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 5159 transitions. [2021-08-06 19:37:25,734 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 5159 transitions. Word has length 20 [2021-08-06 19:37:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:25,734 INFO L470 AbstractCegarLoop]: Abstraction has 2326 states and 5159 transitions. [2021-08-06 19:37:25,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 5159 transitions. [2021-08-06 19:37:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:25,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:25,736 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:25,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:25,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:25,936 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1982823675, now seen corresponding path program 138 times [2021-08-06 19:37:25,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:25,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635737499] [2021-08-06 19:37:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:25,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:26,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:26,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635737499] [2021-08-06 19:37:26,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635737499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:26,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717001663] [2021-08-06 19:37:26,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:37:26,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:26,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:26,071 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:26,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 19:37:27,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:37:27,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:27,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-06 19:37:27,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:28,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:37:28,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:37:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:29,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717001663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:29,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:29,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:37:29,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996731523] [2021-08-06 19:37:29,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:37:29,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:29,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:37:29,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:37:29,572 INFO L87 Difference]: Start difference. First operand 2326 states and 5159 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:29,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:29,890 INFO L93 Difference]: Finished difference Result 2362 states and 5219 transitions. [2021-08-06 19:37:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:37:29,891 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:37:29,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:29,893 INFO L225 Difference]: With dead ends: 2362 [2021-08-06 19:37:29,893 INFO L226 Difference]: Without dead ends: 2354 [2021-08-06 19:37:29,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:37:29,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2021-08-06 19:37:29,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2326. [2021-08-06 19:37:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2325 states have (on average 2.2189247311827955) internal successors, (5159), 2325 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 5159 transitions. [2021-08-06 19:37:29,933 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 5159 transitions. Word has length 20 [2021-08-06 19:37:29,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:29,933 INFO L470 AbstractCegarLoop]: Abstraction has 2326 states and 5159 transitions. [2021-08-06 19:37:29,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 5159 transitions. [2021-08-06 19:37:29,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:29,935 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:29,935 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:29,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2021-08-06 19:37:30,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:30,136 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:30,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:30,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1774387969, now seen corresponding path program 139 times [2021-08-06 19:37:30,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:30,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382514687] [2021-08-06 19:37:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:30,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:30,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:30,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382514687] [2021-08-06 19:37:30,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382514687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:30,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28017783] [2021-08-06 19:37:30,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:37:30,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:30,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:30,256 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:30,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 19:37:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:31,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:37:31,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:32,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:37:32,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:37:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:33,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28017783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:33,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:33,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:37:33,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256217049] [2021-08-06 19:37:33,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:37:33,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:33,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:37:33,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:37:33,145 INFO L87 Difference]: Start difference. First operand 2326 states and 5159 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:33,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:33,453 INFO L93 Difference]: Finished difference Result 2349 states and 5198 transitions. [2021-08-06 19:37:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:37:33,454 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:37:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:33,456 INFO L225 Difference]: With dead ends: 2349 [2021-08-06 19:37:33,456 INFO L226 Difference]: Without dead ends: 2345 [2021-08-06 19:37:33,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 290.8ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:37:33,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-08-06 19:37:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2326. [2021-08-06 19:37:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2325 states have (on average 2.2189247311827955) internal successors, (5159), 2325 states have internal predecessors, (5159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 5159 transitions. [2021-08-06 19:37:33,483 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 5159 transitions. Word has length 20 [2021-08-06 19:37:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:33,483 INFO L470 AbstractCegarLoop]: Abstraction has 2326 states and 5159 transitions. [2021-08-06 19:37:33,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:33,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 5159 transitions. [2021-08-06 19:37:33,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:33,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:33,485 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:33,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:33,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:33,706 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:33,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:33,706 INFO L82 PathProgramCache]: Analyzing trace with hash -33066494, now seen corresponding path program 140 times [2021-08-06 19:37:33,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:33,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174905176] [2021-08-06 19:37:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:33,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:33,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:33,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174905176] [2021-08-06 19:37:33,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174905176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:33,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743135143] [2021-08-06 19:37:33,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:37:33,771 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:33,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:33,772 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:33,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 19:37:35,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:37:35,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:35,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:35,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:35,373 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:35,374 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:35,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743135143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:35,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:35,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:37:35,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672540744] [2021-08-06 19:37:35,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:37:35,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:35,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:37:35,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:37:35,394 INFO L87 Difference]: Start difference. First operand 2326 states and 5159 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:37:35,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:35,482 INFO L93 Difference]: Finished difference Result 2617 states and 5675 transitions. [2021-08-06 19:37:35,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:37:35,482 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 20 [2021-08-06 19:37:35,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:35,485 INFO L225 Difference]: With dead ends: 2617 [2021-08-06 19:37:35,485 INFO L226 Difference]: Without dead ends: 2617 [2021-08-06 19:37:35,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:37:35,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2021-08-06 19:37:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2385. [2021-08-06 19:37:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2384 states have (on average 2.2143456375838926) internal successors, (5279), 2384 states have internal predecessors, (5279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:35,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 5279 transitions. [2021-08-06 19:37:35,513 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 5279 transitions. Word has length 20 [2021-08-06 19:37:35,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:35,513 INFO L470 AbstractCegarLoop]: Abstraction has 2385 states and 5279 transitions. [2021-08-06 19:37:35,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:37:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 5279 transitions. [2021-08-06 19:37:35,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:35,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:35,515 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:35,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2021-08-06 19:37:35,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-08-06 19:37:35,716 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:35,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:35,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1577874464, now seen corresponding path program 141 times [2021-08-06 19:37:35,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:35,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646028986] [2021-08-06 19:37:35,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:35,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:35,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:35,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646028986] [2021-08-06 19:37:35,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646028986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:35,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081987115] [2021-08-06 19:37:35,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:37:35,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:35,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:35,791 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:35,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 19:37:37,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:37:37,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:37,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:37,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:37,423 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:37,424 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:37,443 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:37,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081987115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:37,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:37,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:37:37,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202935714] [2021-08-06 19:37:37,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:37:37,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:37,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:37:37,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:37:37,444 INFO L87 Difference]: Start difference. First operand 2385 states and 5279 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:37:37,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:37,534 INFO L93 Difference]: Finished difference Result 2637 states and 5660 transitions. [2021-08-06 19:37:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:37:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-08-06 19:37:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:37,537 INFO L225 Difference]: With dead ends: 2637 [2021-08-06 19:37:37,537 INFO L226 Difference]: Without dead ends: 2637 [2021-08-06 19:37:37,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:37:37,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-08-06 19:37:37,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2191. [2021-08-06 19:37:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 2.1986301369863015) internal successors, (4815), 2190 states have internal predecessors, (4815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 4815 transitions. [2021-08-06 19:37:37,565 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 4815 transitions. Word has length 20 [2021-08-06 19:37:37,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:37,566 INFO L470 AbstractCegarLoop]: Abstraction has 2191 states and 4815 transitions. [2021-08-06 19:37:37,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:37:37,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 4815 transitions. [2021-08-06 19:37:37,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:37,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:37,567 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:37,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:37,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 19:37:37,781 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:37,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:37,781 INFO L82 PathProgramCache]: Analyzing trace with hash -22563390, now seen corresponding path program 142 times [2021-08-06 19:37:37,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:37,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723203240] [2021-08-06 19:37:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:37,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:37,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:37,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723203240] [2021-08-06 19:37:37,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723203240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:37,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106965175] [2021-08-06 19:37:37,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:37:37,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:37,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:37,851 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:37,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 19:37:39,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:37:39,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:39,472 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:39,472 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:39,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106965175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:39,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:39,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:37:39,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502422505] [2021-08-06 19:37:39,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:37:39,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:39,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:37:39,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:37:39,492 INFO L87 Difference]: Start difference. First operand 2191 states and 4815 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:37:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:39,564 INFO L93 Difference]: Finished difference Result 2930 states and 6324 transitions. [2021-08-06 19:37:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:37:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 20 [2021-08-06 19:37:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:39,567 INFO L225 Difference]: With dead ends: 2930 [2021-08-06 19:37:39,567 INFO L226 Difference]: Without dead ends: 2930 [2021-08-06 19:37:39,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:37:39,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2021-08-06 19:37:39,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 2803. [2021-08-06 19:37:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 2802 states have (on average 2.1720199857244826) internal successors, (6086), 2802 states have internal predecessors, (6086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 6086 transitions. [2021-08-06 19:37:39,611 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 6086 transitions. Word has length 20 [2021-08-06 19:37:39,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:39,611 INFO L470 AbstractCegarLoop]: Abstraction has 2803 states and 6086 transitions. [2021-08-06 19:37:39,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:37:39,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 6086 transitions. [2021-08-06 19:37:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:39,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:39,614 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:39,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:39,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 19:37:39,833 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:39,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1903470688, now seen corresponding path program 143 times [2021-08-06 19:37:39,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:39,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936165042] [2021-08-06 19:37:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:39,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:39,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:39,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936165042] [2021-08-06 19:37:39,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936165042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:39,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145327493] [2021-08-06 19:37:39,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:37:39,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:39,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:39,909 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:39,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 19:37:41,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:37:41,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:41,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:41,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:41,542 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:41,543 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:41,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145327493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:41,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:41,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:37:41,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919012793] [2021-08-06 19:37:41,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:37:41,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:41,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:37:41,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:37:41,563 INFO L87 Difference]: Start difference. First operand 2803 states and 6086 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-08-06 19:37:41,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:41,675 INFO L93 Difference]: Finished difference Result 2995 states and 6454 transitions. [2021-08-06 19:37:41,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:37:41,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-08-06 19:37:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:41,678 INFO L225 Difference]: With dead ends: 2995 [2021-08-06 19:37:41,678 INFO L226 Difference]: Without dead ends: 2995 [2021-08-06 19:37:41,679 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:37:41,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-08-06 19:37:41,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2587. [2021-08-06 19:37:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2586 states have (on average 2.1836813611755606) internal successors, (5647), 2586 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 5647 transitions. [2021-08-06 19:37:41,708 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 5647 transitions. Word has length 20 [2021-08-06 19:37:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:41,708 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 5647 transitions. [2021-08-06 19:37:41,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-08-06 19:37:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 5647 transitions. [2021-08-06 19:37:41,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:41,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:41,710 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:41,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-06 19:37:41,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:41,911 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:41,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:41,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1480984962, now seen corresponding path program 144 times [2021-08-06 19:37:41,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:41,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125776802] [2021-08-06 19:37:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:41,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:41,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:41,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125776802] [2021-08-06 19:37:41,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125776802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:41,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724176016] [2021-08-06 19:37:41,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:37:41,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:41,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:41,988 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:41,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 19:37:43,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:37:43,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:43,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:43,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:43,627 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:43,628 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:43,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724176016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:43,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:43,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:37:43,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39411215] [2021-08-06 19:37:43,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:37:43,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:43,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:37:43,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:37:43,648 INFO L87 Difference]: Start difference. First operand 2587 states and 5647 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-08-06 19:37:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:43,815 INFO L93 Difference]: Finished difference Result 2935 states and 6342 transitions. [2021-08-06 19:37:43,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:37:43,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-08-06 19:37:43,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:43,818 INFO L225 Difference]: With dead ends: 2935 [2021-08-06 19:37:43,818 INFO L226 Difference]: Without dead ends: 2935 [2021-08-06 19:37:43,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:37:43,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2021-08-06 19:37:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 2775. [2021-08-06 19:37:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 2.1737563085796685) internal successors, (6030), 2774 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 6030 transitions. [2021-08-06 19:37:43,851 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 6030 transitions. Word has length 20 [2021-08-06 19:37:43,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:43,851 INFO L470 AbstractCegarLoop]: Abstraction has 2775 states and 6030 transitions. [2021-08-06 19:37:43,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-08-06 19:37:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 6030 transitions. [2021-08-06 19:37:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:43,853 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:43,853 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:43,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:44,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-06 19:37:44,061 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:44,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:44,061 INFO L82 PathProgramCache]: Analyzing trace with hash 98771061, now seen corresponding path program 145 times [2021-08-06 19:37:44,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:44,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706729532] [2021-08-06 19:37:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:44,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:44,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:44,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706729532] [2021-08-06 19:37:44,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706729532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:44,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438837990] [2021-08-06 19:37:44,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:37:44,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:44,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:44,200 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:44,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 19:37:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:45,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:37:45,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:46,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:37:46,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:37:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:47,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438837990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:47,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:47,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-06 19:37:47,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411534518] [2021-08-06 19:37:47,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 19:37:47,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:47,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 19:37:47,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:37:47,651 INFO L87 Difference]: Start difference. First operand 2775 states and 6030 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:48,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:48,045 INFO L93 Difference]: Finished difference Result 2830 states and 6118 transitions. [2021-08-06 19:37:48,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:37:48,045 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:37:48,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:48,048 INFO L225 Difference]: With dead ends: 2830 [2021-08-06 19:37:48,048 INFO L226 Difference]: Without dead ends: 2820 [2021-08-06 19:37:48,049 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 384.0ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:37:48,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-08-06 19:37:48,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2774. [2021-08-06 19:37:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 2.1734583483591776) internal successors, (6027), 2773 states have internal predecessors, (6027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 6027 transitions. [2021-08-06 19:37:48,085 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 6027 transitions. Word has length 20 [2021-08-06 19:37:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:48,085 INFO L470 AbstractCegarLoop]: Abstraction has 2774 states and 6027 transitions. [2021-08-06 19:37:48,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 6027 transitions. [2021-08-06 19:37:48,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:48,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:48,088 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:48,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:48,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-08-06 19:37:48,305 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:48,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:48,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1409870953, now seen corresponding path program 146 times [2021-08-06 19:37:48,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:48,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236532367] [2021-08-06 19:37:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:48,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:48,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:48,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236532367] [2021-08-06 19:37:48,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236532367] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:48,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273875278] [2021-08-06 19:37:48,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:37:48,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:48,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:48,432 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:48,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 19:37:50,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:37:50,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:50,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:37:50,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:50,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:37:50,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:37:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:51,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273875278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:51,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:51,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 19:37:51,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628808885] [2021-08-06 19:37:51,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 19:37:51,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:51,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 19:37:51,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:37:51,183 INFO L87 Difference]: Start difference. First operand 2774 states and 6027 transitions. Second operand has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:51,581 INFO L93 Difference]: Finished difference Result 2817 states and 6100 transitions. [2021-08-06 19:37:51,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:37:51,581 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:37:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:51,584 INFO L225 Difference]: With dead ends: 2817 [2021-08-06 19:37:51,584 INFO L226 Difference]: Without dead ends: 2809 [2021-08-06 19:37:51,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 313.4ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:37:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-08-06 19:37:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2776. [2021-08-06 19:37:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 2.174054054054054) internal successors, (6033), 2775 states have internal predecessors, (6033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:51,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 6033 transitions. [2021-08-06 19:37:51,614 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 6033 transitions. Word has length 20 [2021-08-06 19:37:51,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:51,614 INFO L470 AbstractCegarLoop]: Abstraction has 2776 states and 6033 transitions. [2021-08-06 19:37:51,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:51,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 6033 transitions. [2021-08-06 19:37:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:51,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:51,617 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:51,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:51,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:51,817 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:51,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:51,817 INFO L82 PathProgramCache]: Analyzing trace with hash 65483829, now seen corresponding path program 147 times [2021-08-06 19:37:51,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:51,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577735292] [2021-08-06 19:37:51,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:51,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:51,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:51,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577735292] [2021-08-06 19:37:51,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577735292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:51,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031836585] [2021-08-06 19:37:51,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:37:51,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:51,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:51,942 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:51,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-06 19:37:53,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:37:53,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:53,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-06 19:37:53,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:54,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:37:54,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 65 treesize of output 211 [2021-08-06 19:37:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:55,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031836585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:55,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:55,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-08-06 19:37:55,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785319350] [2021-08-06 19:37:55,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 19:37:55,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:55,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 19:37:55,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:37:55,354 INFO L87 Difference]: Start difference. First operand 2776 states and 6033 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:55,593 INFO L93 Difference]: Finished difference Result 2803 states and 6081 transitions. [2021-08-06 19:37:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:37:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:37:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:55,596 INFO L225 Difference]: With dead ends: 2803 [2021-08-06 19:37:55,596 INFO L226 Difference]: Without dead ends: 2799 [2021-08-06 19:37:55,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:37:55,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-08-06 19:37:55,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2776. [2021-08-06 19:37:55,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 2.174054054054054) internal successors, (6033), 2775 states have internal predecessors, (6033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:55,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 6033 transitions. [2021-08-06 19:37:55,628 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 6033 transitions. Word has length 20 [2021-08-06 19:37:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:55,628 INFO L470 AbstractCegarLoop]: Abstraction has 2776 states and 6033 transitions. [2021-08-06 19:37:55,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 6033 transitions. [2021-08-06 19:37:55,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:55,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:55,630 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:55,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2021-08-06 19:37:55,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-08-06 19:37:55,831 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:55,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1808294164, now seen corresponding path program 148 times [2021-08-06 19:37:55,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:55,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330559430] [2021-08-06 19:37:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:55,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:55,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:55,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330559430] [2021-08-06 19:37:55,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330559430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:55,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915862492] [2021-08-06 19:37:55,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:37:55,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:55,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:55,892 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:55,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-06 19:37:57,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:37:57,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:57,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:57,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:57,620 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:57,620 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:37:57,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915862492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:57,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:57,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:37:57,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734725762] [2021-08-06 19:37:57,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:37:57,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:57,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:37:57,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:37:57,640 INFO L87 Difference]: Start difference. First operand 2776 states and 6033 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:57,719 INFO L93 Difference]: Finished difference Result 3349 states and 7171 transitions. [2021-08-06 19:37:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:37:57,719 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:37:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:57,723 INFO L225 Difference]: With dead ends: 3349 [2021-08-06 19:37:57,723 INFO L226 Difference]: Without dead ends: 3349 [2021-08-06 19:37:57,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:37:57,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3349 states. [2021-08-06 19:37:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3349 to 3186. [2021-08-06 19:37:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 2.1698587127158557) internal successors, (6911), 3185 states have internal predecessors, (6911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 6911 transitions. [2021-08-06 19:37:57,761 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 6911 transitions. Word has length 20 [2021-08-06 19:37:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:57,761 INFO L470 AbstractCegarLoop]: Abstraction has 3186 states and 6911 transitions. [2021-08-06 19:37:57,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:57,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 6911 transitions. [2021-08-06 19:37:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:57,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:57,763 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:57,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-06 19:37:57,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:57,964 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:37:57,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:37:57,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1741970634, now seen corresponding path program 149 times [2021-08-06 19:37:57,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:37:57,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789012062] [2021-08-06 19:37:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:37:57,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:37:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:37:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:58,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:37:58,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789012062] [2021-08-06 19:37:58,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789012062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:58,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068706168] [2021-08-06 19:37:58,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:37:58,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:37:58,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:37:58,027 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:37:58,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-06 19:37:59,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:37:59,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:37:59,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:37:59,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:37:59,775 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:59,775 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:37:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:37:59,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068706168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:37:59,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:37:59,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:37:59,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264531558] [2021-08-06 19:37:59,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:37:59,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:37:59,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:37:59,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:37:59,795 INFO L87 Difference]: Start difference. First operand 3186 states and 6911 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:59,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:37:59,900 INFO L93 Difference]: Finished difference Result 3438 states and 7347 transitions. [2021-08-06 19:37:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:37:59,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:37:59,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:37:59,903 INFO L225 Difference]: With dead ends: 3438 [2021-08-06 19:37:59,903 INFO L226 Difference]: Without dead ends: 3438 [2021-08-06 19:37:59,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:37:59,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3438 states. [2021-08-06 19:37:59,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3438 to 3202. [2021-08-06 19:37:59,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3202 states, 3201 states have (on average 2.1683848797250858) internal successors, (6941), 3201 states have internal predecessors, (6941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3202 states to 3202 states and 6941 transitions. [2021-08-06 19:37:59,947 INFO L78 Accepts]: Start accepts. Automaton has 3202 states and 6941 transitions. Word has length 20 [2021-08-06 19:37:59,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:37:59,948 INFO L470 AbstractCegarLoop]: Abstraction has 3202 states and 6941 transitions. [2021-08-06 19:37:59,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:37:59,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3202 states and 6941 transitions. [2021-08-06 19:37:59,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:37:59,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:37:59,951 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:37:59,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-06 19:38:00,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:00,153 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:00,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:00,153 INFO L82 PathProgramCache]: Analyzing trace with hash -131029676, now seen corresponding path program 150 times [2021-08-06 19:38:00,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:00,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894521031] [2021-08-06 19:38:00,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:00,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:00,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:00,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894521031] [2021-08-06 19:38:00,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894521031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:00,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002700960] [2021-08-06 19:38:00,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:38:00,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:00,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:00,216 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:00,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-06 19:38:01,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:38:01,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:01,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:38:01,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:01,935 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:01,936 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:01,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002700960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:01,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:01,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:38:01,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105219475] [2021-08-06 19:38:01,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:38:01,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:01,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:38:01,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:38:01,956 INFO L87 Difference]: Start difference. First operand 3202 states and 6941 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:02,063 INFO L93 Difference]: Finished difference Result 5178 states and 11024 transitions. [2021-08-06 19:38:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:38:02,064 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:38:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:02,069 INFO L225 Difference]: With dead ends: 5178 [2021-08-06 19:38:02,069 INFO L226 Difference]: Without dead ends: 5178 [2021-08-06 19:38:02,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:38:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5178 states. [2021-08-06 19:38:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5178 to 5054. [2021-08-06 19:38:02,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5054 states, 5053 states have (on average 2.1373441519889176) internal successors, (10800), 5053 states have internal predecessors, (10800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5054 states to 5054 states and 10800 transitions. [2021-08-06 19:38:02,135 INFO L78 Accepts]: Start accepts. Automaton has 5054 states and 10800 transitions. Word has length 20 [2021-08-06 19:38:02,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:02,135 INFO L470 AbstractCegarLoop]: Abstraction has 5054 states and 10800 transitions. [2021-08-06 19:38:02,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:02,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5054 states and 10800 transitions. [2021-08-06 19:38:02,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:38:02,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:02,138 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:02,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:02,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:02,339 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:02,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:02,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1731467530, now seen corresponding path program 151 times [2021-08-06 19:38:02,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:02,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976981951] [2021-08-06 19:38:02,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:02,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:02,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:02,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976981951] [2021-08-06 19:38:02,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976981951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:02,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522229401] [2021-08-06 19:38:02,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:38:02,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:02,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:02,408 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:02,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-06 19:38:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:04,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:38:04,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:04,141 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:04,141 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:04,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522229401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:04,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:04,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:38:04,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136259707] [2021-08-06 19:38:04,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:38:04,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:04,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:38:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:38:04,161 INFO L87 Difference]: Start difference. First operand 5054 states and 10800 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:04,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:04,270 INFO L93 Difference]: Finished difference Result 5151 states and 10909 transitions. [2021-08-06 19:38:04,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:38:04,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:38:04,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:04,276 INFO L225 Difference]: With dead ends: 5151 [2021-08-06 19:38:04,276 INFO L226 Difference]: Without dead ends: 5151 [2021-08-06 19:38:04,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:38:04,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-08-06 19:38:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 4752. [2021-08-06 19:38:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4752 states, 4751 states have (on average 2.1302883603451903) internal successors, (10121), 4751 states have internal predecessors, (10121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:04,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4752 states to 4752 states and 10121 transitions. [2021-08-06 19:38:04,362 INFO L78 Accepts]: Start accepts. Automaton has 4752 states and 10121 transitions. Word has length 20 [2021-08-06 19:38:04,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:04,362 INFO L470 AbstractCegarLoop]: Abstraction has 4752 states and 10121 transitions. [2021-08-06 19:38:04,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:04,362 INFO L276 IsEmpty]: Start isEmpty. Operand 4752 states and 10121 transitions. [2021-08-06 19:38:04,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:38:04,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:04,366 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:04,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:04,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:04,567 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:04,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:04,567 INFO L82 PathProgramCache]: Analyzing trace with hash 194566548, now seen corresponding path program 152 times [2021-08-06 19:38:04,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:04,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782322037] [2021-08-06 19:38:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:04,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:04,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:04,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782322037] [2021-08-06 19:38:04,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782322037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:04,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4147184] [2021-08-06 19:38:04,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:38:04,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:04,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:04,639 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:04,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-06 19:38:06,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:38:06,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:06,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:38:06,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:06,392 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:06,393 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:06,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4147184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:06,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:06,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:38:06,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204022237] [2021-08-06 19:38:06,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:38:06,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:06,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:38:06,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:38:06,413 INFO L87 Difference]: Start difference. First operand 4752 states and 10121 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:06,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:06,496 INFO L93 Difference]: Finished difference Result 4973 states and 10562 transitions. [2021-08-06 19:38:06,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:38:06,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 19:38:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:06,501 INFO L225 Difference]: With dead ends: 4973 [2021-08-06 19:38:06,501 INFO L226 Difference]: Without dead ends: 4973 [2021-08-06 19:38:06,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:38:06,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2021-08-06 19:38:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 4920. [2021-08-06 19:38:06,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4920 states, 4919 states have (on average 2.1256352917259607) internal successors, (10456), 4919 states have internal predecessors, (10456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4920 states to 4920 states and 10456 transitions. [2021-08-06 19:38:06,556 INFO L78 Accepts]: Start accepts. Automaton has 4920 states and 10456 transitions. Word has length 20 [2021-08-06 19:38:06,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:06,556 INFO L470 AbstractCegarLoop]: Abstraction has 4920 states and 10456 transitions. [2021-08-06 19:38:06,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:06,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4920 states and 10456 transitions. [2021-08-06 19:38:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:38:06,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:06,560 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:06,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2021-08-06 19:38:06,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:06,761 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:06,761 INFO L82 PathProgramCache]: Analyzing trace with hash -227919178, now seen corresponding path program 153 times [2021-08-06 19:38:06,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:06,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66170097] [2021-08-06 19:38:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:06,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:06,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:06,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66170097] [2021-08-06 19:38:06,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66170097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:06,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353412875] [2021-08-06 19:38:06,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:38:06,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:06,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:06,846 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:06,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-06 19:38:08,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:38:08,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:08,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:38:08,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:08,623 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:08,624 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:08,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353412875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:08,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:08,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:38:08,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888852657] [2021-08-06 19:38:08,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:38:08,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:38:08,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:38:08,644 INFO L87 Difference]: Start difference. First operand 4920 states and 10456 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:38:08,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:08,768 INFO L93 Difference]: Finished difference Result 4995 states and 10606 transitions. [2021-08-06 19:38:08,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:38:08,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-08-06 19:38:08,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:08,773 INFO L225 Difference]: With dead ends: 4995 [2021-08-06 19:38:08,773 INFO L226 Difference]: Without dead ends: 4995 [2021-08-06 19:38:08,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:38:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4995 states. [2021-08-06 19:38:08,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4995 to 4961. [2021-08-06 19:38:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4961 states, 4960 states have (on average 2.1245967741935483) internal successors, (10538), 4960 states have internal predecessors, (10538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4961 states to 4961 states and 10538 transitions. [2021-08-06 19:38:08,833 INFO L78 Accepts]: Start accepts. Automaton has 4961 states and 10538 transitions. Word has length 20 [2021-08-06 19:38:08,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:08,833 INFO L470 AbstractCegarLoop]: Abstraction has 4961 states and 10538 transitions. [2021-08-06 19:38:08,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:38:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 4961 states and 10538 transitions. [2021-08-06 19:38:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 19:38:08,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:08,837 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:08,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-08-06 19:38:09,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-06 19:38:09,037 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:09,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:09,038 INFO L82 PathProgramCache]: Analyzing trace with hash -440074796, now seen corresponding path program 154 times [2021-08-06 19:38:09,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:09,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172875256] [2021-08-06 19:38:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:09,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:09,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:09,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172875256] [2021-08-06 19:38:09,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172875256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:09,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174499485] [2021-08-06 19:38:09,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:38:09,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:09,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:09,134 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:09,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-06 19:38:10,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:38:10,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:10,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-06 19:38:10,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:10,888 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:10,888 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:10,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174499485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:10,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:10,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:38:10,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454044455] [2021-08-06 19:38:10,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:38:10,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:10,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:38:10,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:38:10,909 INFO L87 Difference]: Start difference. First operand 4961 states and 10538 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:38:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:11,092 INFO L93 Difference]: Finished difference Result 5125 states and 10866 transitions. [2021-08-06 19:38:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:38:11,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 20 [2021-08-06 19:38:11,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:11,098 INFO L225 Difference]: With dead ends: 5125 [2021-08-06 19:38:11,098 INFO L226 Difference]: Without dead ends: 5125 [2021-08-06 19:38:11,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:38:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5125 states. [2021-08-06 19:38:11,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5125 to 4996. [2021-08-06 19:38:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4996 states, 4995 states have (on average 2.1237237237237236) internal successors, (10608), 4995 states have internal predecessors, (10608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4996 states to 4996 states and 10608 transitions. [2021-08-06 19:38:11,159 INFO L78 Accepts]: Start accepts. Automaton has 4996 states and 10608 transitions. Word has length 20 [2021-08-06 19:38:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:11,159 INFO L470 AbstractCegarLoop]: Abstraction has 4996 states and 10608 transitions. [2021-08-06 19:38:11,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:38:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 4996 states and 10608 transitions. [2021-08-06 19:38:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:11,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:11,163 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:11,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-06 19:38:11,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-06 19:38:11,364 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:11,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:11,364 INFO L82 PathProgramCache]: Analyzing trace with hash 765824978, now seen corresponding path program 155 times [2021-08-06 19:38:11,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:11,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689924383] [2021-08-06 19:38:11,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:11,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:11,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:11,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689924383] [2021-08-06 19:38:11,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689924383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:11,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384459291] [2021-08-06 19:38:11,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:38:11,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:11,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:11,459 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:11,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-06 19:38:13,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:38:13,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:13,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:13,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:13,226 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:13,226 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:13,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384459291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:13,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:13,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:38:13,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364308424] [2021-08-06 19:38:13,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:38:13,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:13,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:38:13,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:38:13,244 INFO L87 Difference]: Start difference. First operand 4996 states and 10608 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-08-06 19:38:13,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:13,389 INFO L93 Difference]: Finished difference Result 5055 states and 10699 transitions. [2021-08-06 19:38:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:38:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 21 [2021-08-06 19:38:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:13,394 INFO L225 Difference]: With dead ends: 5055 [2021-08-06 19:38:13,394 INFO L226 Difference]: Without dead ends: 5052 [2021-08-06 19:38:13,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:38:13,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2021-08-06 19:38:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 4983. [2021-08-06 19:38:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4983 states, 4982 states have (on average 2.1216378964271376) internal successors, (10570), 4982 states have internal predecessors, (10570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4983 states to 4983 states and 10570 transitions. [2021-08-06 19:38:13,480 INFO L78 Accepts]: Start accepts. Automaton has 4983 states and 10570 transitions. Word has length 21 [2021-08-06 19:38:13,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:13,480 INFO L470 AbstractCegarLoop]: Abstraction has 4983 states and 10570 transitions. [2021-08-06 19:38:13,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-08-06 19:38:13,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4983 states and 10570 transitions. [2021-08-06 19:38:13,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:13,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:13,483 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:13,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2021-08-06 19:38:13,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-06 19:38:13,684 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:13,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:13,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1527881311, now seen corresponding path program 156 times [2021-08-06 19:38:13,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:13,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939478728] [2021-08-06 19:38:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:13,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:13,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:13,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939478728] [2021-08-06 19:38:13,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939478728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:13,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052328677] [2021-08-06 19:38:13,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:38:13,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:13,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:13,785 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:13,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-06 19:38:15,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:38:15,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:15,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:15,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:15,556 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:15,556 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:15,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052328677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:15,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:15,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:38:15,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732130058] [2021-08-06 19:38:15,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:38:15,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:15,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:38:15,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:38:15,580 INFO L87 Difference]: Start difference. First operand 4983 states and 10570 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-08-06 19:38:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:15,756 INFO L93 Difference]: Finished difference Result 5110 states and 10776 transitions. [2021-08-06 19:38:15,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:38:15,756 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 21 [2021-08-06 19:38:15,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:15,761 INFO L225 Difference]: With dead ends: 5110 [2021-08-06 19:38:15,761 INFO L226 Difference]: Without dead ends: 5106 [2021-08-06 19:38:15,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:38:15,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5106 states. [2021-08-06 19:38:15,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5106 to 4997. [2021-08-06 19:38:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4997 states, 4996 states have (on average 2.1222978382706166) internal successors, (10603), 4996 states have internal predecessors, (10603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:15,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4997 states to 4997 states and 10603 transitions. [2021-08-06 19:38:15,818 INFO L78 Accepts]: Start accepts. Automaton has 4997 states and 10603 transitions. Word has length 21 [2021-08-06 19:38:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:15,819 INFO L470 AbstractCegarLoop]: Abstraction has 4997 states and 10603 transitions. [2021-08-06 19:38:15,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-08-06 19:38:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4997 states and 10603 transitions. [2021-08-06 19:38:15,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:15,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:15,822 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:15,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-06 19:38:16,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:16,023 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:16,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:16,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1693143201, now seen corresponding path program 157 times [2021-08-06 19:38:16,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:16,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179391769] [2021-08-06 19:38:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:16,023 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:16,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:16,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179391769] [2021-08-06 19:38:16,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179391769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:16,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009659896] [2021-08-06 19:38:16,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:38:16,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:16,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:16,102 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:16,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-06 19:38:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:17,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:17,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:17,880 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:17,880 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:17,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009659896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:17,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:17,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-06 19:38:17,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329908943] [2021-08-06 19:38:17,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:38:17,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:17,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:38:17,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:38:17,900 INFO L87 Difference]: Start difference. First operand 4997 states and 10603 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:17,962 INFO L93 Difference]: Finished difference Result 5230 states and 10998 transitions. [2021-08-06 19:38:17,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:38:17,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:38:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:17,967 INFO L225 Difference]: With dead ends: 5230 [2021-08-06 19:38:17,968 INFO L226 Difference]: Without dead ends: 5230 [2021-08-06 19:38:17,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:38:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5230 states. [2021-08-06 19:38:18,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5230 to 4990. [2021-08-06 19:38:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4990 states, 4989 states have (on average 2.1210663459611143) internal successors, (10582), 4989 states have internal predecessors, (10582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4990 states to 4990 states and 10582 transitions. [2021-08-06 19:38:18,030 INFO L78 Accepts]: Start accepts. Automaton has 4990 states and 10582 transitions. Word has length 21 [2021-08-06 19:38:18,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:18,030 INFO L470 AbstractCegarLoop]: Abstraction has 4990 states and 10582 transitions. [2021-08-06 19:38:18,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4990 states and 10582 transitions. [2021-08-06 19:38:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:18,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:18,034 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:18,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:18,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:18,235 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:18,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1416982799, now seen corresponding path program 158 times [2021-08-06 19:38:18,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:18,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760472713] [2021-08-06 19:38:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:18,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:18,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:18,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760472713] [2021-08-06 19:38:18,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760472713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:18,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005507966] [2021-08-06 19:38:18,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:38:18,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:18,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:18,305 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:18,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-06 19:38:20,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:38:20,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:20,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:20,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:20,087 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:20,088 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:20,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005507966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:20,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:20,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:38:20,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833792082] [2021-08-06 19:38:20,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:38:20,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:20,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:38:20,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:38:20,108 INFO L87 Difference]: Start difference. First operand 4990 states and 10582 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:20,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:20,177 INFO L93 Difference]: Finished difference Result 5533 states and 11607 transitions. [2021-08-06 19:38:20,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:38:20,177 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:38:20,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:20,183 INFO L225 Difference]: With dead ends: 5533 [2021-08-06 19:38:20,183 INFO L226 Difference]: Without dead ends: 5533 [2021-08-06 19:38:20,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:38:20,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2021-08-06 19:38:20,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 4990. [2021-08-06 19:38:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4990 states, 4989 states have (on average 2.1210663459611143) internal successors, (10582), 4989 states have internal predecessors, (10582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:20,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4990 states to 4990 states and 10582 transitions. [2021-08-06 19:38:20,269 INFO L78 Accepts]: Start accepts. Automaton has 4990 states and 10582 transitions. Word has length 21 [2021-08-06 19:38:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:20,270 INFO L470 AbstractCegarLoop]: Abstraction has 4990 states and 10582 transitions. [2021-08-06 19:38:20,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4990 states and 10582 transitions. [2021-08-06 19:38:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:20,273 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:20,273 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:20,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2021-08-06 19:38:20,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:20,474 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:20,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1674655461, now seen corresponding path program 159 times [2021-08-06 19:38:20,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:20,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381165828] [2021-08-06 19:38:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:20,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:20,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:20,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381165828] [2021-08-06 19:38:20,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381165828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:20,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149589067] [2021-08-06 19:38:20,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:38:20,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:20,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:20,539 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:20,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-06 19:38:22,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:38:22,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:22,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:22,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:22,331 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:22,331 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:38:22,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149589067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:22,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:22,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:38:22,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132320035] [2021-08-06 19:38:22,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:38:22,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:22,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:38:22,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:38:22,351 INFO L87 Difference]: Start difference. First operand 4990 states and 10582 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:22,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:22,445 INFO L93 Difference]: Finished difference Result 5075 states and 10684 transitions. [2021-08-06 19:38:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:38:22,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:38:22,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:22,451 INFO L225 Difference]: With dead ends: 5075 [2021-08-06 19:38:22,451 INFO L226 Difference]: Without dead ends: 5074 [2021-08-06 19:38:22,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:38:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5074 states. [2021-08-06 19:38:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5074 to 5000. [2021-08-06 19:38:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5000 states, 4999 states have (on average 2.1214242848569715) internal successors, (10605), 4999 states have internal predecessors, (10605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5000 states to 5000 states and 10605 transitions. [2021-08-06 19:38:22,507 INFO L78 Accepts]: Start accepts. Automaton has 5000 states and 10605 transitions. Word has length 21 [2021-08-06 19:38:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:22,507 INFO L470 AbstractCegarLoop]: Abstraction has 5000 states and 10605 transitions. [2021-08-06 19:38:22,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5000 states and 10605 transitions. [2021-08-06 19:38:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:22,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:22,511 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:22,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:22,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:22,712 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:22,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1642458434, now seen corresponding path program 160 times [2021-08-06 19:38:22,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:22,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089471840] [2021-08-06 19:38:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:22,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:22,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:22,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089471840] [2021-08-06 19:38:22,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089471840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:22,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110518991] [2021-08-06 19:38:22,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:38:22,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:22,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:22,793 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:22,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-06 19:38:24,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:38:24,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:24,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:24,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:24,578 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:24,578 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:38:24,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110518991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:24,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:24,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:38:24,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471201005] [2021-08-06 19:38:24,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:38:24,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:24,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:38:24,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:38:24,595 INFO L87 Difference]: Start difference. First operand 5000 states and 10605 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:24,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:24,667 INFO L93 Difference]: Finished difference Result 5158 states and 10908 transitions. [2021-08-06 19:38:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:38:24,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:38:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:24,672 INFO L225 Difference]: With dead ends: 5158 [2021-08-06 19:38:24,672 INFO L226 Difference]: Without dead ends: 5157 [2021-08-06 19:38:24,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:38:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5157 states. [2021-08-06 19:38:24,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5157 to 5038. [2021-08-06 19:38:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5038 states, 5037 states have (on average 2.127853881278539) internal successors, (10718), 5037 states have internal predecessors, (10718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5038 states to 5038 states and 10718 transitions. [2021-08-06 19:38:24,734 INFO L78 Accepts]: Start accepts. Automaton has 5038 states and 10718 transitions. Word has length 21 [2021-08-06 19:38:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:24,734 INFO L470 AbstractCegarLoop]: Abstraction has 5038 states and 10718 transitions. [2021-08-06 19:38:24,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 5038 states and 10718 transitions. [2021-08-06 19:38:24,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:24,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:24,739 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:24,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2021-08-06 19:38:24,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:24,940 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:24,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:24,940 INFO L82 PathProgramCache]: Analyzing trace with hash -909698527, now seen corresponding path program 161 times [2021-08-06 19:38:24,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:24,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328551767] [2021-08-06 19:38:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:24,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:25,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:25,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328551767] [2021-08-06 19:38:25,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328551767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:25,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233688635] [2021-08-06 19:38:25,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:38:25,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:25,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:25,041 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:25,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2021-08-06 19:38:26,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:38:26,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:26,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:26,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:26,832 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:26,833 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:38:26,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233688635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:26,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:26,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:38:26,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544030008] [2021-08-06 19:38:26,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:38:26,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:26,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:38:26,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:38:26,853 INFO L87 Difference]: Start difference. First operand 5038 states and 10718 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:26,905 INFO L93 Difference]: Finished difference Result 5108 states and 10785 transitions. [2021-08-06 19:38:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:38:26,905 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:38:26,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:26,910 INFO L225 Difference]: With dead ends: 5108 [2021-08-06 19:38:26,910 INFO L226 Difference]: Without dead ends: 5108 [2021-08-06 19:38:26,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:38:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5108 states. [2021-08-06 19:38:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5108 to 5035. [2021-08-06 19:38:26,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5035 states, 5034 states have (on average 2.1271354787445373) internal successors, (10708), 5034 states have internal predecessors, (10708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5035 states to 5035 states and 10708 transitions. [2021-08-06 19:38:26,968 INFO L78 Accepts]: Start accepts. Automaton has 5035 states and 10708 transitions. Word has length 21 [2021-08-06 19:38:26,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:26,969 INFO L470 AbstractCegarLoop]: Abstraction has 5035 states and 10708 transitions. [2021-08-06 19:38:26,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:26,969 INFO L276 IsEmpty]: Start isEmpty. Operand 5035 states and 10708 transitions. [2021-08-06 19:38:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:26,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:26,972 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:26,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:27,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:27,173 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:27,173 INFO L82 PathProgramCache]: Analyzing trace with hash -164996029, now seen corresponding path program 162 times [2021-08-06 19:38:27,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:27,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750732493] [2021-08-06 19:38:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:27,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:27,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:27,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750732493] [2021-08-06 19:38:27,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750732493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:27,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252421244] [2021-08-06 19:38:27,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:38:27,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:27,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:27,242 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:27,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2021-08-06 19:38:28,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:38:28,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:28,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:28,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:29,058 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:29,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:29,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252421244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:29,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:29,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:38:29,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139684017] [2021-08-06 19:38:29,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:38:29,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:29,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:38:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:38:29,078 INFO L87 Difference]: Start difference. First operand 5035 states and 10708 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:29,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:29,148 INFO L93 Difference]: Finished difference Result 5524 states and 11617 transitions. [2021-08-06 19:38:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:38:29,148 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:38:29,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:29,154 INFO L225 Difference]: With dead ends: 5524 [2021-08-06 19:38:29,154 INFO L226 Difference]: Without dead ends: 5524 [2021-08-06 19:38:29,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:38:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-08-06 19:38:29,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 5030. [2021-08-06 19:38:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 5029 states have (on average 2.126068800954464) internal successors, (10692), 5029 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 10692 transitions. [2021-08-06 19:38:29,218 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 10692 transitions. Word has length 21 [2021-08-06 19:38:29,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:29,218 INFO L470 AbstractCegarLoop]: Abstraction has 5030 states and 10692 transitions. [2021-08-06 19:38:29,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:29,218 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 10692 transitions. [2021-08-06 19:38:29,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:29,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:29,221 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:29,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2021-08-06 19:38:29,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-08-06 19:38:29,422 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:29,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:29,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1445944929, now seen corresponding path program 163 times [2021-08-06 19:38:29,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:29,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069840511] [2021-08-06 19:38:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:29,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:29,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:29,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069840511] [2021-08-06 19:38:29,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069840511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:29,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565756071] [2021-08-06 19:38:29,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:38:29,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:29,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:29,523 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:29,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2021-08-06 19:38:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:31,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:31,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:31,414 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:31,414 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:31,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565756071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:31,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:31,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:38:31,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409432950] [2021-08-06 19:38:31,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:38:31,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:31,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:38:31,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:38:31,434 INFO L87 Difference]: Start difference. First operand 5030 states and 10692 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:31,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:31,530 INFO L93 Difference]: Finished difference Result 5953 states and 12469 transitions. [2021-08-06 19:38:31,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:38:31,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:38:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:31,536 INFO L225 Difference]: With dead ends: 5953 [2021-08-06 19:38:31,536 INFO L226 Difference]: Without dead ends: 5953 [2021-08-06 19:38:31,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:38:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5953 states. [2021-08-06 19:38:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5953 to 4997. [2021-08-06 19:38:31,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4997 states, 4996 states have (on average 2.1234987990392313) internal successors, (10609), 4996 states have internal predecessors, (10609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4997 states to 4997 states and 10609 transitions. [2021-08-06 19:38:31,606 INFO L78 Accepts]: Start accepts. Automaton has 4997 states and 10609 transitions. Word has length 21 [2021-08-06 19:38:31,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:31,606 INFO L470 AbstractCegarLoop]: Abstraction has 4997 states and 10609 transitions. [2021-08-06 19:38:31,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:31,607 INFO L276 IsEmpty]: Start isEmpty. Operand 4997 states and 10609 transitions. [2021-08-06 19:38:31,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:31,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:31,610 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:31,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2021-08-06 19:38:31,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-06 19:38:31,811 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:31,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:31,811 INFO L82 PathProgramCache]: Analyzing trace with hash -122047951, now seen corresponding path program 164 times [2021-08-06 19:38:31,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:31,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41709794] [2021-08-06 19:38:31,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:31,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:31,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:31,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41709794] [2021-08-06 19:38:31,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41709794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:31,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505323234] [2021-08-06 19:38:31,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:38:31,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:31,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:31,868 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:31,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2021-08-06 19:38:33,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:38:33,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:33,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:33,680 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:33,680 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:38:33,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505323234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:33,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:33,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:38:33,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107500310] [2021-08-06 19:38:33,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:38:33,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:33,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:38:33,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:38:33,701 INFO L87 Difference]: Start difference. First operand 4997 states and 10609 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:33,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:33,789 INFO L93 Difference]: Finished difference Result 5080 states and 10710 transitions. [2021-08-06 19:38:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:38:33,789 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:38:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:33,794 INFO L225 Difference]: With dead ends: 5080 [2021-08-06 19:38:33,794 INFO L226 Difference]: Without dead ends: 5079 [2021-08-06 19:38:33,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:38:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5079 states. [2021-08-06 19:38:33,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5079 to 5009. [2021-08-06 19:38:33,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5009 states, 5008 states have (on average 2.1240015974440896) internal successors, (10637), 5008 states have internal predecessors, (10637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:33,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5009 states to 5009 states and 10637 transitions. [2021-08-06 19:38:33,855 INFO L78 Accepts]: Start accepts. Automaton has 5009 states and 10637 transitions. Word has length 21 [2021-08-06 19:38:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:33,855 INFO L470 AbstractCegarLoop]: Abstraction has 5009 states and 10637 transitions. [2021-08-06 19:38:33,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 5009 states and 10637 transitions. [2021-08-06 19:38:33,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:33,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:33,859 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:33,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2021-08-06 19:38:34,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-06 19:38:34,065 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash -154244978, now seen corresponding path program 165 times [2021-08-06 19:38:34,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:34,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825888686] [2021-08-06 19:38:34,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:34,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:34,131 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:34,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:34,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825888686] [2021-08-06 19:38:34,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825888686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:34,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550673176] [2021-08-06 19:38:34,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:38:34,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:34,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:34,132 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:34,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2021-08-06 19:38:35,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:38:35,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:35,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:35,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:35,986 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:35,987 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:38:36,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550673176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:36,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:36,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:38:36,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928096479] [2021-08-06 19:38:36,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:38:36,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:36,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:38:36,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:38:36,003 INFO L87 Difference]: Start difference. First operand 5009 states and 10637 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:36,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:36,077 INFO L93 Difference]: Finished difference Result 5141 states and 10867 transitions. [2021-08-06 19:38:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:38:36,078 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:38:36,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:36,088 INFO L225 Difference]: With dead ends: 5141 [2021-08-06 19:38:36,088 INFO L226 Difference]: Without dead ends: 5140 [2021-08-06 19:38:36,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:38:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5140 states. [2021-08-06 19:38:36,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5140 to 5027. [2021-08-06 19:38:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5027 states, 5026 states have (on average 2.126939912455233) internal successors, (10690), 5026 states have internal predecessors, (10690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:36,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5027 states to 5027 states and 10690 transitions. [2021-08-06 19:38:36,166 INFO L78 Accepts]: Start accepts. Automaton has 5027 states and 10690 transitions. Word has length 21 [2021-08-06 19:38:36,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:36,167 INFO L470 AbstractCegarLoop]: Abstraction has 5027 states and 10690 transitions. [2021-08-06 19:38:36,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:36,167 INFO L276 IsEmpty]: Start isEmpty. Operand 5027 states and 10690 transitions. [2021-08-06 19:38:36,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:36,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:36,172 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:36,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2021-08-06 19:38:36,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-06 19:38:36,372 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:36,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:36,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1588565357, now seen corresponding path program 166 times [2021-08-06 19:38:36,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:36,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962609899] [2021-08-06 19:38:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:36,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:36,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:36,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962609899] [2021-08-06 19:38:36,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962609899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:36,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877871192] [2021-08-06 19:38:36,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:38:36,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:36,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:36,437 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:36,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2021-08-06 19:38:38,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:38:38,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:38,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:38,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:38,318 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:38,319 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:38,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877871192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:38,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:38,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:38:38,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531728333] [2021-08-06 19:38:38,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:38:38,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:38:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:38:38,339 INFO L87 Difference]: Start difference. First operand 5027 states and 10690 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:38,399 INFO L93 Difference]: Finished difference Result 5234 states and 11030 transitions. [2021-08-06 19:38:38,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:38:38,399 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:38:38,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:38,404 INFO L225 Difference]: With dead ends: 5234 [2021-08-06 19:38:38,404 INFO L226 Difference]: Without dead ends: 5234 [2021-08-06 19:38:38,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:38:38,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5234 states. [2021-08-06 19:38:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5234 to 5027. [2021-08-06 19:38:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5027 states, 5026 states have (on average 2.1267409470752088) internal successors, (10689), 5026 states have internal predecessors, (10689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:38,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5027 states to 5027 states and 10689 transitions. [2021-08-06 19:38:38,463 INFO L78 Accepts]: Start accepts. Automaton has 5027 states and 10689 transitions. Word has length 21 [2021-08-06 19:38:38,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:38,463 INFO L470 AbstractCegarLoop]: Abstraction has 5027 states and 10689 transitions. [2021-08-06 19:38:38,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:38,463 INFO L276 IsEmpty]: Start isEmpty. Operand 5027 states and 10689 transitions. [2021-08-06 19:38:38,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:38,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:38,466 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:38,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2021-08-06 19:38:38,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-08-06 19:38:38,667 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1961699441, now seen corresponding path program 167 times [2021-08-06 19:38:38,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:38,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477729575] [2021-08-06 19:38:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:38,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:38,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:38,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477729575] [2021-08-06 19:38:38,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477729575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:38,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773021756] [2021-08-06 19:38:38,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:38:38,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:38,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:38,735 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:38,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2021-08-06 19:38:40,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:38:40,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:40,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:40,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:40,603 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:40,603 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:40,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773021756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:40,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:40,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:38:40,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334427809] [2021-08-06 19:38:40,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:38:40,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:40,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:38:40,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:38:40,624 INFO L87 Difference]: Start difference. First operand 5027 states and 10689 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:40,682 INFO L93 Difference]: Finished difference Result 5092 states and 10750 transitions. [2021-08-06 19:38:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:38:40,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:38:40,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:40,687 INFO L225 Difference]: With dead ends: 5092 [2021-08-06 19:38:40,687 INFO L226 Difference]: Without dead ends: 5092 [2021-08-06 19:38:40,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:38:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5092 states. [2021-08-06 19:38:40,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5092 to 5020. [2021-08-06 19:38:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5020 states, 5019 states have (on average 2.126120741183503) internal successors, (10671), 5019 states have internal predecessors, (10671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5020 states to 5020 states and 10671 transitions. [2021-08-06 19:38:40,746 INFO L78 Accepts]: Start accepts. Automaton has 5020 states and 10671 transitions. Word has length 21 [2021-08-06 19:38:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:40,746 INFO L470 AbstractCegarLoop]: Abstraction has 5020 states and 10671 transitions. [2021-08-06 19:38:40,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 5020 states and 10671 transitions. [2021-08-06 19:38:40,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:40,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:40,750 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:40,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2021-08-06 19:38:40,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:40,950 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:40,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:40,951 INFO L82 PathProgramCache]: Analyzing trace with hash -350758483, now seen corresponding path program 168 times [2021-08-06 19:38:40,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:40,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181956138] [2021-08-06 19:38:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:40,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:41,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:41,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181956138] [2021-08-06 19:38:41,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181956138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:41,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804885695] [2021-08-06 19:38:41,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:38:41,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:41,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:41,033 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:41,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2021-08-06 19:38:42,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:38:42,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:42,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:42,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:42,911 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:42,911 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:42,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804885695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:42,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:42,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:38:42,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861089058] [2021-08-06 19:38:42,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:38:42,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:42,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:38:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:38:42,931 INFO L87 Difference]: Start difference. First operand 5020 states and 10671 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:43,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:43,026 INFO L93 Difference]: Finished difference Result 5735 states and 12036 transitions. [2021-08-06 19:38:43,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:38:43,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:38:43,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:43,033 INFO L225 Difference]: With dead ends: 5735 [2021-08-06 19:38:43,033 INFO L226 Difference]: Without dead ends: 5735 [2021-08-06 19:38:43,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:38:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5735 states. [2021-08-06 19:38:43,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5735 to 5016. [2021-08-06 19:38:43,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5016 states, 5015 states have (on average 2.1252243270189433) internal successors, (10658), 5015 states have internal predecessors, (10658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5016 states to 5016 states and 10658 transitions. [2021-08-06 19:38:43,107 INFO L78 Accepts]: Start accepts. Automaton has 5016 states and 10658 transitions. Word has length 21 [2021-08-06 19:38:43,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:43,107 INFO L470 AbstractCegarLoop]: Abstraction has 5016 states and 10658 transitions. [2021-08-06 19:38:43,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:43,107 INFO L276 IsEmpty]: Start isEmpty. Operand 5016 states and 10658 transitions. [2021-08-06 19:38:43,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:43,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:43,111 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:43,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2021-08-06 19:38:43,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:43,312 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:43,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1951196337, now seen corresponding path program 169 times [2021-08-06 19:38:43,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:43,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108336780] [2021-08-06 19:38:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:43,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:43,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:43,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108336780] [2021-08-06 19:38:43,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108336780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:43,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427645577] [2021-08-06 19:38:43,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:38:43,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:43,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:43,392 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:43,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2021-08-06 19:38:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:45,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:45,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:45,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:45,243 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:45,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427645577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:45,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:45,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:38:45,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445407266] [2021-08-06 19:38:45,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:38:45,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:45,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:38:45,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:38:45,263 INFO L87 Difference]: Start difference. First operand 5016 states and 10658 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:45,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:45,399 INFO L93 Difference]: Finished difference Result 6252 states and 13154 transitions. [2021-08-06 19:38:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:38:45,399 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:38:45,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:45,408 INFO L225 Difference]: With dead ends: 6252 [2021-08-06 19:38:45,408 INFO L226 Difference]: Without dead ends: 6252 [2021-08-06 19:38:45,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:38:45,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6252 states. [2021-08-06 19:38:45,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6252 to 5044. [2021-08-06 19:38:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5044 states, 5043 states have (on average 2.1255205234979178) internal successors, (10719), 5043 states have internal predecessors, (10719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5044 states to 5044 states and 10719 transitions. [2021-08-06 19:38:45,503 INFO L78 Accepts]: Start accepts. Automaton has 5044 states and 10719 transitions. Word has length 21 [2021-08-06 19:38:45,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:45,503 INFO L470 AbstractCegarLoop]: Abstraction has 5044 states and 10719 transitions. [2021-08-06 19:38:45,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 5044 states and 10719 transitions. [2021-08-06 19:38:45,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:45,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:45,507 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:45,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:45,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-08-06 19:38:45,707 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:45,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:45,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1391941535, now seen corresponding path program 170 times [2021-08-06 19:38:45,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:45,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384709156] [2021-08-06 19:38:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:45,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:45,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:45,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384709156] [2021-08-06 19:38:45,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384709156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:45,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320444558] [2021-08-06 19:38:45,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:38:45,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:45,781 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:45,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2021-08-06 19:38:47,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:38:47,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:47,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:47,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:47,647 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:47,647 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:47,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320444558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:47,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:47,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:38:47,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61263369] [2021-08-06 19:38:47,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:38:47,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:47,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:38:47,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:38:47,669 INFO L87 Difference]: Start difference. First operand 5044 states and 10719 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:47,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:47,773 INFO L93 Difference]: Finished difference Result 6261 states and 13118 transitions. [2021-08-06 19:38:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:38:47,773 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:38:47,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:47,779 INFO L225 Difference]: With dead ends: 6261 [2021-08-06 19:38:47,780 INFO L226 Difference]: Without dead ends: 6261 [2021-08-06 19:38:47,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:38:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2021-08-06 19:38:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 3526. [2021-08-06 19:38:47,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 2.123687943262411) internal successors, (7486), 3525 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:47,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 7486 transitions. [2021-08-06 19:38:47,836 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 7486 transitions. Word has length 21 [2021-08-06 19:38:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:47,836 INFO L470 AbstractCegarLoop]: Abstraction has 3526 states and 7486 transitions. [2021-08-06 19:38:47,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:47,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 7486 transitions. [2021-08-06 19:38:47,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:47,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:47,839 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:47,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2021-08-06 19:38:48,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:48,039 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:48,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:48,039 INFO L82 PathProgramCache]: Analyzing trace with hash 14721125, now seen corresponding path program 171 times [2021-08-06 19:38:48,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:48,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241816924] [2021-08-06 19:38:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:48,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:48,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:48,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241816924] [2021-08-06 19:38:48,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241816924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:48,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600398251] [2021-08-06 19:38:48,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:38:48,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:48,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:48,112 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:48,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2021-08-06 19:38:49,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:38:49,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:49,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:49,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:49,960 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:49,960 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:38:49,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600398251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:49,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:49,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:38:49,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488666389] [2021-08-06 19:38:49,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:38:49,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:49,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:38:49,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:38:49,980 INFO L87 Difference]: Start difference. First operand 3526 states and 7486 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:50,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:50,070 INFO L93 Difference]: Finished difference Result 3601 states and 7573 transitions. [2021-08-06 19:38:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:38:50,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:38:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:50,074 INFO L225 Difference]: With dead ends: 3601 [2021-08-06 19:38:50,074 INFO L226 Difference]: Without dead ends: 3599 [2021-08-06 19:38:50,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:38:50,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3599 states. [2021-08-06 19:38:50,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3599 to 3536. [2021-08-06 19:38:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3536 states, 3535 states have (on average 2.1236209335219236) internal successors, (7507), 3535 states have internal predecessors, (7507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3536 states to 3536 states and 7507 transitions. [2021-08-06 19:38:50,118 INFO L78 Accepts]: Start accepts. Automaton has 3536 states and 7507 transitions. Word has length 21 [2021-08-06 19:38:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:50,118 INFO L470 AbstractCegarLoop]: Abstraction has 3536 states and 7507 transitions. [2021-08-06 19:38:50,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3536 states and 7507 transitions. [2021-08-06 19:38:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:50,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:50,121 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:50,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2021-08-06 19:38:50,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:50,321 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:50,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:50,321 INFO L82 PathProgramCache]: Analyzing trace with hash -17475902, now seen corresponding path program 172 times [2021-08-06 19:38:50,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:50,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948847107] [2021-08-06 19:38:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:50,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:50,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:50,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948847107] [2021-08-06 19:38:50,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948847107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:50,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363841877] [2021-08-06 19:38:50,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:38:50,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:50,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:50,385 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:50,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2021-08-06 19:38:52,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:38:52,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:52,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:52,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:52,317 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:52,318 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:38:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:38:52,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363841877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:52,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:52,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:38:52,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117220548] [2021-08-06 19:38:52,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:38:52,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:52,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:38:52,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:38:52,335 INFO L87 Difference]: Start difference. First operand 3536 states and 7507 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:52,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:52,390 INFO L93 Difference]: Finished difference Result 3659 states and 7725 transitions. [2021-08-06 19:38:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:38:52,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:38:52,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:52,394 INFO L225 Difference]: With dead ends: 3659 [2021-08-06 19:38:52,394 INFO L226 Difference]: Without dead ends: 3658 [2021-08-06 19:38:52,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:38:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-08-06 19:38:52,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 3541. [2021-08-06 19:38:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 3540 states have (on average 2.1257062146892656) internal successors, (7525), 3540 states have internal predecessors, (7525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 7525 transitions. [2021-08-06 19:38:52,434 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 7525 transitions. Word has length 21 [2021-08-06 19:38:52,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:52,434 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 7525 transitions. [2021-08-06 19:38:52,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 7525 transitions. [2021-08-06 19:38:52,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:52,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:52,437 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:52,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:52,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-08-06 19:38:52,653 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:52,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1725334433, now seen corresponding path program 173 times [2021-08-06 19:38:52,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:52,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413643509] [2021-08-06 19:38:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:52,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:52,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:52,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413643509] [2021-08-06 19:38:52,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413643509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:52,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420565976] [2021-08-06 19:38:52,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:38:52,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:52,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:52,711 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:52,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2021-08-06 19:38:54,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:38:54,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:54,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:54,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:54,616 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:54,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:38:54,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420565976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:54,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:54,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:38:54,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549490664] [2021-08-06 19:38:54,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:38:54,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:54,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:38:54,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:38:54,637 INFO L87 Difference]: Start difference. First operand 3541 states and 7525 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:54,705 INFO L93 Difference]: Finished difference Result 3748 states and 7871 transitions. [2021-08-06 19:38:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:38:54,705 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:38:54,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:54,709 INFO L225 Difference]: With dead ends: 3748 [2021-08-06 19:38:54,709 INFO L226 Difference]: Without dead ends: 3748 [2021-08-06 19:38:54,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:38:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-08-06 19:38:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3542. [2021-08-06 19:38:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3542 states, 3541 states have (on average 2.1256707144874327) internal successors, (7527), 3541 states have internal predecessors, (7527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:54,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3542 states to 3542 states and 7527 transitions. [2021-08-06 19:38:54,758 INFO L78 Accepts]: Start accepts. Automaton has 3542 states and 7527 transitions. Word has length 21 [2021-08-06 19:38:54,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:54,758 INFO L470 AbstractCegarLoop]: Abstraction has 3542 states and 7527 transitions. [2021-08-06 19:38:54,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:38:54,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3542 states and 7527 transitions. [2021-08-06 19:38:54,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:54,762 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:54,762 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:54,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2021-08-06 19:38:54,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:54,962 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:54,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1824930365, now seen corresponding path program 174 times [2021-08-06 19:38:54,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:54,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083200197] [2021-08-06 19:38:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:54,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:55,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:55,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083200197] [2021-08-06 19:38:55,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083200197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:55,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156916105] [2021-08-06 19:38:55,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:38:55,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:55,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:55,029 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:55,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2021-08-06 19:38:56,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:38:56,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:38:56,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:56,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:56,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:56,937 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:56,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156916105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:56,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:56,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:38:56,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151734382] [2021-08-06 19:38:56,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:38:56,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:56,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:38:56,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:38:56,957 INFO L87 Difference]: Start difference. First operand 3542 states and 7527 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:57,028 INFO L93 Difference]: Finished difference Result 3782 states and 7938 transitions. [2021-08-06 19:38:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:38:57,028 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:38:57,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:57,032 INFO L225 Difference]: With dead ends: 3782 [2021-08-06 19:38:57,032 INFO L226 Difference]: Without dead ends: 3782 [2021-08-06 19:38:57,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:38:57,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2021-08-06 19:38:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 3518. [2021-08-06 19:38:57,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 3517 states have (on average 2.1236849587716806) internal successors, (7469), 3517 states have internal predecessors, (7469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:57,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 7469 transitions. [2021-08-06 19:38:57,072 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 7469 transitions. Word has length 21 [2021-08-06 19:38:57,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:57,072 INFO L470 AbstractCegarLoop]: Abstraction has 3518 states and 7469 transitions. [2021-08-06 19:38:57,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:57,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 7469 transitions. [2021-08-06 19:38:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:57,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:57,075 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:57,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2021-08-06 19:38:57,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:57,275 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:57,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:57,275 INFO L82 PathProgramCache]: Analyzing trace with hash -213989407, now seen corresponding path program 175 times [2021-08-06 19:38:57,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:57,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242691558] [2021-08-06 19:38:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:57,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:57,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:57,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242691558] [2021-08-06 19:38:57,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242691558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:57,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194379782] [2021-08-06 19:38:57,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:38:57,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:57,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:57,345 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:57,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2021-08-06 19:38:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:59,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:38:59,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:38:59,252 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:59,253 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:38:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:38:59,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194379782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:59,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:38:59,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:38:59,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410584002] [2021-08-06 19:38:59,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:38:59,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:38:59,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:38:59,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:38:59,272 INFO L87 Difference]: Start difference. First operand 3518 states and 7469 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:59,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:38:59,346 INFO L93 Difference]: Finished difference Result 3577 states and 7509 transitions. [2021-08-06 19:38:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:38:59,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:38:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:38:59,350 INFO L225 Difference]: With dead ends: 3577 [2021-08-06 19:38:59,350 INFO L226 Difference]: Without dead ends: 3577 [2021-08-06 19:38:59,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:38:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3577 states. [2021-08-06 19:38:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3577 to 3473. [2021-08-06 19:38:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3473 states, 3472 states have (on average 2.120103686635945) internal successors, (7361), 3472 states have internal predecessors, (7361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3473 states to 3473 states and 7361 transitions. [2021-08-06 19:38:59,390 INFO L78 Accepts]: Start accepts. Automaton has 3473 states and 7361 transitions. Word has length 21 [2021-08-06 19:38:59,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:38:59,390 INFO L470 AbstractCegarLoop]: Abstraction has 3473 states and 7361 transitions. [2021-08-06 19:38:59,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:38:59,391 INFO L276 IsEmpty]: Start isEmpty. Operand 3473 states and 7361 transitions. [2021-08-06 19:38:59,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:38:59,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:38:59,393 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:38:59,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2021-08-06 19:38:59,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:59,594 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:38:59,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:38:59,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1814427261, now seen corresponding path program 176 times [2021-08-06 19:38:59,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:38:59,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569132170] [2021-08-06 19:38:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:38:59,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:38:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:38:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:38:59,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:38:59,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569132170] [2021-08-06 19:38:59,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569132170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:38:59,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59424944] [2021-08-06 19:38:59,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:38:59,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:38:59,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:38:59,675 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:38:59,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2021-08-06 19:39:01,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:39:01,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:01,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:01,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:01,745 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:01,745 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:01,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59424944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:01,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:01,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:39:01,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941656758] [2021-08-06 19:39:01,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:39:01,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:01,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:39:01,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:39:01,765 INFO L87 Difference]: Start difference. First operand 3473 states and 7361 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:01,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:01,867 INFO L93 Difference]: Finished difference Result 4119 states and 8593 transitions. [2021-08-06 19:39:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:39:01,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-08-06 19:39:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:01,872 INFO L225 Difference]: With dead ends: 4119 [2021-08-06 19:39:01,872 INFO L226 Difference]: Without dead ends: 4119 [2021-08-06 19:39:01,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:39:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2021-08-06 19:39:01,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 2512. [2021-08-06 19:39:01,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2511 states have (on average 2.1198725607327757) internal successors, (5323), 2511 states have internal predecessors, (5323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:01,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 5323 transitions. [2021-08-06 19:39:01,907 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 5323 transitions. Word has length 21 [2021-08-06 19:39:01,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:01,907 INFO L470 AbstractCegarLoop]: Abstraction has 2512 states and 5323 transitions. [2021-08-06 19:39:01,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:01,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 5323 transitions. [2021-08-06 19:39:01,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:01,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:01,909 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:01,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2021-08-06 19:39:02,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-08-06 19:39:02,110 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:02,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:02,110 INFO L82 PathProgramCache]: Analyzing trace with hash 111606817, now seen corresponding path program 177 times [2021-08-06 19:39:02,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:02,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399524951] [2021-08-06 19:39:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:02,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:02,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:02,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399524951] [2021-08-06 19:39:02,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399524951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:02,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847642916] [2021-08-06 19:39:02,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:39:02,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:02,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:02,188 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:02,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2021-08-06 19:39:04,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:39:04,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:04,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:04,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:04,098 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:04,098 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:04,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847642916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:04,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:04,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:39:04,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518528338] [2021-08-06 19:39:04,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:39:04,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:04,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:39:04,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:39:04,118 INFO L87 Difference]: Start difference. First operand 2512 states and 5323 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:04,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:04,266 INFO L93 Difference]: Finished difference Result 4315 states and 8976 transitions. [2021-08-06 19:39:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:39:04,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-08-06 19:39:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:04,270 INFO L225 Difference]: With dead ends: 4315 [2021-08-06 19:39:04,270 INFO L226 Difference]: Without dead ends: 4315 [2021-08-06 19:39:04,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:39:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4315 states. [2021-08-06 19:39:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4315 to 2665. [2021-08-06 19:39:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2664 states have (on average 2.130255255255255) internal successors, (5675), 2664 states have internal predecessors, (5675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 5675 transitions. [2021-08-06 19:39:04,308 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 5675 transitions. Word has length 21 [2021-08-06 19:39:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:04,308 INFO L470 AbstractCegarLoop]: Abstraction has 2665 states and 5675 transitions. [2021-08-06 19:39:04,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 5675 transitions. [2021-08-06 19:39:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:04,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:04,310 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:04,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2021-08-06 19:39:04,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:04,511 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:04,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:04,511 INFO L82 PathProgramCache]: Analyzing trace with hash 268636495, now seen corresponding path program 178 times [2021-08-06 19:39:04,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:04,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717568741] [2021-08-06 19:39:04,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:04,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:04,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:04,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717568741] [2021-08-06 19:39:04,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717568741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:04,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816699581] [2021-08-06 19:39:04,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:39:04,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:04,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:04,619 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:04,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2021-08-06 19:39:06,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:39:06,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:06,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:06,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:06,548 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:06,549 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:06,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816699581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:06,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:06,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:39:06,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122845898] [2021-08-06 19:39:06,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:39:06,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:06,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:39:06,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:39:06,568 INFO L87 Difference]: Start difference. First operand 2665 states and 5675 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:06,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:06,704 INFO L93 Difference]: Finished difference Result 3382 states and 7089 transitions. [2021-08-06 19:39:06,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:39:06,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-08-06 19:39:06,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:06,708 INFO L225 Difference]: With dead ends: 3382 [2021-08-06 19:39:06,708 INFO L226 Difference]: Without dead ends: 3382 [2021-08-06 19:39:06,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:39:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2021-08-06 19:39:06,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 1658. [2021-08-06 19:39:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 2.167773083886542) internal successors, (3592), 1657 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 3592 transitions. [2021-08-06 19:39:06,733 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 3592 transitions. Word has length 21 [2021-08-06 19:39:06,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:06,733 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 3592 transitions. [2021-08-06 19:39:06,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 3592 transitions. [2021-08-06 19:39:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:06,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:06,735 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:06,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2021-08-06 19:39:06,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:06,935 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:06,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:06,936 INFO L82 PathProgramCache]: Analyzing trace with hash -40404815, now seen corresponding path program 179 times [2021-08-06 19:39:06,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:06,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808394597] [2021-08-06 19:39:06,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:06,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:06,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:06,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808394597] [2021-08-06 19:39:06,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808394597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:06,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235628683] [2021-08-06 19:39:06,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:39:06,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:06,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:06,997 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:06,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2021-08-06 19:39:08,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:39:08,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:08,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:08,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:08,922 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:08,922 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:39:08,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235628683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:08,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:08,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:39:08,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562628212] [2021-08-06 19:39:08,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:39:08,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:08,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:39:08,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:39:08,942 INFO L87 Difference]: Start difference. First operand 1658 states and 3592 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:39:09,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:09,019 INFO L93 Difference]: Finished difference Result 1718 states and 3662 transitions. [2021-08-06 19:39:09,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:39:09,019 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:39:09,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:09,021 INFO L225 Difference]: With dead ends: 1718 [2021-08-06 19:39:09,021 INFO L226 Difference]: Without dead ends: 1716 [2021-08-06 19:39:09,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:39:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-08-06 19:39:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1669. [2021-08-06 19:39:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 2.16726618705036) internal successors, (3615), 1668 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 3615 transitions. [2021-08-06 19:39:09,037 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 3615 transitions. Word has length 21 [2021-08-06 19:39:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:09,037 INFO L470 AbstractCegarLoop]: Abstraction has 1669 states and 3615 transitions. [2021-08-06 19:39:09,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:39:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 3615 transitions. [2021-08-06 19:39:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:09,039 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:09,039 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:09,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2021-08-06 19:39:09,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-08-06 19:39:09,239 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:09,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:09,240 INFO L82 PathProgramCache]: Analyzing trace with hash -72601842, now seen corresponding path program 180 times [2021-08-06 19:39:09,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:09,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032015852] [2021-08-06 19:39:09,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:09,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:09,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:09,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032015852] [2021-08-06 19:39:09,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032015852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:09,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731952453] [2021-08-06 19:39:09,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:39:09,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:09,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:09,304 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:09,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2021-08-06 19:39:11,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:39:11,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:11,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:11,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:11,245 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:11,245 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:39:11,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731952453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:11,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:11,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:39:11,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660992630] [2021-08-06 19:39:11,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:39:11,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:11,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:39:11,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:39:11,263 INFO L87 Difference]: Start difference. First operand 1669 states and 3615 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:39:11,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:11,311 INFO L93 Difference]: Finished difference Result 1782 states and 3798 transitions. [2021-08-06 19:39:11,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:39:11,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:39:11,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:11,313 INFO L225 Difference]: With dead ends: 1782 [2021-08-06 19:39:11,313 INFO L226 Difference]: Without dead ends: 1781 [2021-08-06 19:39:11,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:39:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-08-06 19:39:11,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1661. [2021-08-06 19:39:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 2.1656626506024095) internal successors, (3595), 1660 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:11,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 3595 transitions. [2021-08-06 19:39:11,332 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 3595 transitions. Word has length 21 [2021-08-06 19:39:11,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:11,332 INFO L470 AbstractCegarLoop]: Abstraction has 1661 states and 3595 transitions. [2021-08-06 19:39:11,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:39:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 3595 transitions. [2021-08-06 19:39:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:11,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:11,334 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:11,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2021-08-06 19:39:11,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:11,553 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:11,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1670208493, now seen corresponding path program 181 times [2021-08-06 19:39:11,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:11,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855371716] [2021-08-06 19:39:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:11,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:11,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:11,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855371716] [2021-08-06 19:39:11,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855371716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:11,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125842562] [2021-08-06 19:39:11,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:39:11,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:11,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:11,614 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:11,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2021-08-06 19:39:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:13,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:13,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:13,554 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:13,555 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:13,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125842562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:13,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:13,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:39:13,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101547801] [2021-08-06 19:39:13,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:39:13,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:13,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:39:13,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:39:13,575 INFO L87 Difference]: Start difference. First operand 1661 states and 3595 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:39:13,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:13,633 INFO L93 Difference]: Finished difference Result 1785 states and 3796 transitions. [2021-08-06 19:39:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:39:13,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:39:13,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:13,635 INFO L225 Difference]: With dead ends: 1785 [2021-08-06 19:39:13,635 INFO L226 Difference]: Without dead ends: 1785 [2021-08-06 19:39:13,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:39:13,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-08-06 19:39:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1662. [2021-08-06 19:39:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.165562913907285) internal successors, (3597), 1661 states have internal predecessors, (3597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3597 transitions. [2021-08-06 19:39:13,653 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3597 transitions. Word has length 21 [2021-08-06 19:39:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:13,653 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 3597 transitions. [2021-08-06 19:39:13,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:39:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3597 transitions. [2021-08-06 19:39:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:13,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:13,654 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:13,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2021-08-06 19:39:13,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:13,855 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:13,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:13,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1880056305, now seen corresponding path program 182 times [2021-08-06 19:39:13,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:13,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042153521] [2021-08-06 19:39:13,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:13,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:13,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:13,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042153521] [2021-08-06 19:39:13,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042153521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:13,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019161114] [2021-08-06 19:39:13,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:39:13,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:13,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:13,923 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:13,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2021-08-06 19:39:15,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:39:15,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:15,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:15,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:15,912 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:15,913 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:15,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019161114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:15,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:15,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:39:15,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086835223] [2021-08-06 19:39:15,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:39:15,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:15,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:39:15,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:39:15,935 INFO L87 Difference]: Start difference. First operand 1662 states and 3597 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:16,024 INFO L93 Difference]: Finished difference Result 1837 states and 3900 transitions. [2021-08-06 19:39:16,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:39:16,024 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:39:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:16,026 INFO L225 Difference]: With dead ends: 1837 [2021-08-06 19:39:16,026 INFO L226 Difference]: Without dead ends: 1837 [2021-08-06 19:39:16,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:39:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2021-08-06 19:39:16,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1663. [2021-08-06 19:39:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 2.1654632972322503) internal successors, (3599), 1662 states have internal predecessors, (3599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:16,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 3599 transitions. [2021-08-06 19:39:16,050 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 3599 transitions. Word has length 21 [2021-08-06 19:39:16,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:16,050 INFO L470 AbstractCegarLoop]: Abstraction has 1663 states and 3599 transitions. [2021-08-06 19:39:16,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:16,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 3599 transitions. [2021-08-06 19:39:16,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:16,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:16,052 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:16,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2021-08-06 19:39:16,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:16,253 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:16,253 INFO L82 PathProgramCache]: Analyzing trace with hash -269115347, now seen corresponding path program 183 times [2021-08-06 19:39:16,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:16,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606140235] [2021-08-06 19:39:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:16,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:16,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:16,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606140235] [2021-08-06 19:39:16,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606140235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:16,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163635458] [2021-08-06 19:39:16,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:39:16,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:16,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:16,335 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:16,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2021-08-06 19:39:18,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:39:18,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:18,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:18,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:18,318 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:18,318 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:18,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163635458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:18,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:18,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:39:18,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470733925] [2021-08-06 19:39:18,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:39:18,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:18,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:39:18,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:39:18,338 INFO L87 Difference]: Start difference. First operand 1663 states and 3599 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:18,421 INFO L93 Difference]: Finished difference Result 1815 states and 3855 transitions. [2021-08-06 19:39:18,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:39:18,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:39:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:18,423 INFO L225 Difference]: With dead ends: 1815 [2021-08-06 19:39:18,423 INFO L226 Difference]: Without dead ends: 1815 [2021-08-06 19:39:18,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:39:18,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-08-06 19:39:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1635. [2021-08-06 19:39:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 2.1634026927784578) internal successors, (3535), 1634 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 3535 transitions. [2021-08-06 19:39:18,440 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 3535 transitions. Word has length 21 [2021-08-06 19:39:18,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:18,441 INFO L470 AbstractCegarLoop]: Abstraction has 1635 states and 3535 transitions. [2021-08-06 19:39:18,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 3535 transitions. [2021-08-06 19:39:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:18,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:18,442 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:18,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2021-08-06 19:39:18,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:18,643 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:18,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1869553201, now seen corresponding path program 184 times [2021-08-06 19:39:18,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:18,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603747335] [2021-08-06 19:39:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:18,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:18,727 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:18,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:18,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603747335] [2021-08-06 19:39:18,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603747335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:18,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695976441] [2021-08-06 19:39:18,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:39:18,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:18,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:18,728 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:18,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2021-08-06 19:39:20,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:39:20,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:20,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:20,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:20,668 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:20,668 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:20,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695976441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:20,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:20,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:39:20,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396412108] [2021-08-06 19:39:20,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:39:20,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:20,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:39:20,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:39:20,688 INFO L87 Difference]: Start difference. First operand 1635 states and 3535 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:20,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:20,744 INFO L93 Difference]: Finished difference Result 2208 states and 4699 transitions. [2021-08-06 19:39:20,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:39:20,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:39:20,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:20,747 INFO L225 Difference]: With dead ends: 2208 [2021-08-06 19:39:20,747 INFO L226 Difference]: Without dead ends: 2208 [2021-08-06 19:39:20,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:39:20,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-08-06 19:39:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2050. [2021-08-06 19:39:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 2.146900927281601) internal successors, (4399), 2049 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 4399 transitions. [2021-08-06 19:39:20,768 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 4399 transitions. Word has length 21 [2021-08-06 19:39:20,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:20,768 INFO L470 AbstractCegarLoop]: Abstraction has 2050 states and 4399 transitions. [2021-08-06 19:39:20,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 4399 transitions. [2021-08-06 19:39:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:20,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:20,770 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:20,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2021-08-06 19:39:20,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:20,981 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:20,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:20,981 INFO L82 PathProgramCache]: Analyzing trace with hash 56480877, now seen corresponding path program 185 times [2021-08-06 19:39:20,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:20,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564907690] [2021-08-06 19:39:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:20,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:21,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:21,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564907690] [2021-08-06 19:39:21,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564907690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:21,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388702110] [2021-08-06 19:39:21,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:39:21,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:21,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:21,060 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:21,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2021-08-06 19:39:22,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:39:22,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:22,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:22,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:23,036 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:23,037 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:23,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388702110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:23,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:23,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:39:23,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814177770] [2021-08-06 19:39:23,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:39:23,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:23,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:39:23,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:39:23,061 INFO L87 Difference]: Start difference. First operand 2050 states and 4399 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:23,162 INFO L93 Difference]: Finished difference Result 2270 states and 4823 transitions. [2021-08-06 19:39:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:39:23,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-08-06 19:39:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:23,165 INFO L225 Difference]: With dead ends: 2270 [2021-08-06 19:39:23,165 INFO L226 Difference]: Without dead ends: 2270 [2021-08-06 19:39:23,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:39:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-08-06 19:39:23,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1795. [2021-08-06 19:39:23,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 2.1555183946488294) internal successors, (3867), 1794 states have internal predecessors, (3867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 3867 transitions. [2021-08-06 19:39:23,185 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 3867 transitions. Word has length 21 [2021-08-06 19:39:23,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:23,185 INFO L470 AbstractCegarLoop]: Abstraction has 1795 states and 3867 transitions. [2021-08-06 19:39:23,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 3867 transitions. [2021-08-06 19:39:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:23,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:23,187 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:23,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2021-08-06 19:39:23,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-08-06 19:39:23,387 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:23,388 INFO L82 PathProgramCache]: Analyzing trace with hash -366004849, now seen corresponding path program 186 times [2021-08-06 19:39:23,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:23,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717751515] [2021-08-06 19:39:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:23,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:23,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:23,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717751515] [2021-08-06 19:39:23,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717751515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:23,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726619458] [2021-08-06 19:39:23,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:39:23,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:23,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:23,480 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:23,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2021-08-06 19:39:25,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:39:25,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:25,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:25,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:25,482 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:25,482 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:25,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726619458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:25,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:25,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:39:25,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316239187] [2021-08-06 19:39:25,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:39:25,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:25,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:39:25,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:39:25,502 INFO L87 Difference]: Start difference. First operand 1795 states and 3867 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:25,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:25,659 INFO L93 Difference]: Finished difference Result 2670 states and 5624 transitions. [2021-08-06 19:39:25,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:39:25,659 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-08-06 19:39:25,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:25,662 INFO L225 Difference]: With dead ends: 2670 [2021-08-06 19:39:25,662 INFO L226 Difference]: Without dead ends: 2670 [2021-08-06 19:39:25,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:39:25,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-08-06 19:39:25,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 1878. [2021-08-06 19:39:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.1523708044752263) internal successors, (4040), 1877 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:25,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 4040 transitions. [2021-08-06 19:39:25,683 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 4040 transitions. Word has length 21 [2021-08-06 19:39:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:25,683 INFO L470 AbstractCegarLoop]: Abstraction has 1878 states and 4040 transitions. [2021-08-06 19:39:25,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 4040 transitions. [2021-08-06 19:39:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:25,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:25,685 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:25,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2021-08-06 19:39:25,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-08-06 19:39:25,886 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:25,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:25,886 INFO L82 PathProgramCache]: Analyzing trace with hash -871646875, now seen corresponding path program 187 times [2021-08-06 19:39:25,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:25,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042572016] [2021-08-06 19:39:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:25,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:25,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:25,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042572016] [2021-08-06 19:39:25,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042572016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:25,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057764095] [2021-08-06 19:39:25,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:39:25,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:25,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:25,965 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:25,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2021-08-06 19:39:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:27,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:27,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:27,932 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:27,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:27,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057764095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:27,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:27,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:39:27,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163157065] [2021-08-06 19:39:27,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:39:27,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:27,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:39:27,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:39:27,954 INFO L87 Difference]: Start difference. First operand 1878 states and 4040 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:39:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:28,070 INFO L93 Difference]: Finished difference Result 1938 states and 4098 transitions. [2021-08-06 19:39:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:39:28,070 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21 [2021-08-06 19:39:28,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:28,072 INFO L225 Difference]: With dead ends: 1938 [2021-08-06 19:39:28,072 INFO L226 Difference]: Without dead ends: 1935 [2021-08-06 19:39:28,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:39:28,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2021-08-06 19:39:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1878. [2021-08-06 19:39:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 2.150239744272776) internal successors, (4036), 1877 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 4036 transitions. [2021-08-06 19:39:28,090 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 4036 transitions. Word has length 21 [2021-08-06 19:39:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:28,091 INFO L470 AbstractCegarLoop]: Abstraction has 1878 states and 4036 transitions. [2021-08-06 19:39:28,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:39:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 4036 transitions. [2021-08-06 19:39:28,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:28,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:28,092 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:28,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2021-08-06 19:39:28,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-08-06 19:39:28,293 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1748218750, now seen corresponding path program 188 times [2021-08-06 19:39:28,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:28,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306557510] [2021-08-06 19:39:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:28,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:28,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:28,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306557510] [2021-08-06 19:39:28,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306557510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:28,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423683395] [2021-08-06 19:39:28,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:39:28,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:28,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:28,374 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:28,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2021-08-06 19:39:30,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:39:30,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:30,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:30,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:30,354 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:30,355 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:30,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423683395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:30,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:30,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:39:30,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95525556] [2021-08-06 19:39:30,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:39:30,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:30,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:39:30,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:39:30,373 INFO L87 Difference]: Start difference. First operand 1878 states and 4036 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:39:30,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:30,476 INFO L93 Difference]: Finished difference Result 1988 states and 4219 transitions. [2021-08-06 19:39:30,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:39:30,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21 [2021-08-06 19:39:30,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:30,479 INFO L225 Difference]: With dead ends: 1988 [2021-08-06 19:39:30,479 INFO L226 Difference]: Without dead ends: 1986 [2021-08-06 19:39:30,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:39:30,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-08-06 19:39:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1849. [2021-08-06 19:39:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 2.137987012987013) internal successors, (3951), 1848 states have internal predecessors, (3951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 3951 transitions. [2021-08-06 19:39:30,502 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 3951 transitions. Word has length 21 [2021-08-06 19:39:30,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:30,502 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 3951 transitions. [2021-08-06 19:39:30,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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) [2021-08-06 19:39:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 3951 transitions. [2021-08-06 19:39:30,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:30,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:30,505 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:30,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2021-08-06 19:39:30,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:30,709 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:30,709 INFO L82 PathProgramCache]: Analyzing trace with hash 721485507, now seen corresponding path program 189 times [2021-08-06 19:39:30,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:30,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660827844] [2021-08-06 19:39:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:30,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:30,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:30,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660827844] [2021-08-06 19:39:30,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660827844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:30,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998621119] [2021-08-06 19:39:30,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:39:30,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:30,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:30,793 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:30,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2021-08-06 19:39:32,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:39:32,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:32,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:32,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:32,777 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:32,777 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:32,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998621119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:32,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:32,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:39:32,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035670021] [2021-08-06 19:39:32,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:39:32,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:32,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:39:32,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:39:32,797 INFO L87 Difference]: Start difference. First operand 1849 states and 3951 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:32,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:32,853 INFO L93 Difference]: Finished difference Result 1966 states and 4149 transitions. [2021-08-06 19:39:32,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:39:32,853 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:39:32,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:32,855 INFO L225 Difference]: With dead ends: 1966 [2021-08-06 19:39:32,855 INFO L226 Difference]: Without dead ends: 1966 [2021-08-06 19:39:32,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:39:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-08-06 19:39:32,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1780. [2021-08-06 19:39:32,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 2.132096683530073) internal successors, (3793), 1779 states have internal predecessors, (3793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 3793 transitions. [2021-08-06 19:39:32,873 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 3793 transitions. Word has length 21 [2021-08-06 19:39:32,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:32,873 INFO L470 AbstractCegarLoop]: Abstraction has 1780 states and 3793 transitions. [2021-08-06 19:39:32,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:32,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 3793 transitions. [2021-08-06 19:39:32,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:32,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:32,874 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:32,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2021-08-06 19:39:33,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:33,075 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:33,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:33,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1647447711, now seen corresponding path program 190 times [2021-08-06 19:39:33,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:33,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686573358] [2021-08-06 19:39:33,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:33,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:33,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:33,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686573358] [2021-08-06 19:39:33,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686573358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:33,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916183727] [2021-08-06 19:39:33,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:39:33,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:33,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:33,155 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:33,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2021-08-06 19:39:35,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:39:35,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:35,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:35,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:35,131 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:35,132 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:35,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916183727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:35,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:35,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:39:35,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883194716] [2021-08-06 19:39:35,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:39:35,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:35,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:39:35,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:39:35,152 INFO L87 Difference]: Start difference. First operand 1780 states and 3793 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:35,261 INFO L93 Difference]: Finished difference Result 2141 states and 4499 transitions. [2021-08-06 19:39:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:39:35,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-08-06 19:39:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:35,264 INFO L225 Difference]: With dead ends: 2141 [2021-08-06 19:39:35,264 INFO L226 Difference]: Without dead ends: 2141 [2021-08-06 19:39:35,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-08-06 19:39:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-08-06 19:39:35,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1342. [2021-08-06 19:39:35,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 2.158090976882923) internal successors, (2894), 1341 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 2894 transitions. [2021-08-06 19:39:35,282 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 2894 transitions. Word has length 21 [2021-08-06 19:39:35,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:35,282 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 2894 transitions. [2021-08-06 19:39:35,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 2894 transitions. [2021-08-06 19:39:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:35,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:35,283 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:35,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2021-08-06 19:39:35,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:35,483 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:35,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:35,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2069933437, now seen corresponding path program 191 times [2021-08-06 19:39:35,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:35,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152793900] [2021-08-06 19:39:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:35,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:35,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:35,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152793900] [2021-08-06 19:39:35,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152793900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:35,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58193254] [2021-08-06 19:39:35,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:39:35,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:35,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:35,579 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:35,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2021-08-06 19:39:37,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:39:37,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:37,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:37,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:37,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:37,606 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:37,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58193254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:37,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:37,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:39:37,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801324305] [2021-08-06 19:39:37,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:39:37,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:37,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:39:37,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:39:37,626 INFO L87 Difference]: Start difference. First operand 1342 states and 2894 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:37,794 INFO L93 Difference]: Finished difference Result 2096 states and 4402 transitions. [2021-08-06 19:39:37,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:39:37,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-08-06 19:39:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:37,796 INFO L225 Difference]: With dead ends: 2096 [2021-08-06 19:39:37,796 INFO L226 Difference]: Without dead ends: 2096 [2021-08-06 19:39:37,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:39:37,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2021-08-06 19:39:37,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1292. [2021-08-06 19:39:37,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.166537567776917) internal successors, (2797), 1291 states have internal predecessors, (2797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:37,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 2797 transitions. [2021-08-06 19:39:37,812 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 2797 transitions. Word has length 21 [2021-08-06 19:39:37,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:37,812 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 2797 transitions. [2021-08-06 19:39:37,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:37,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 2797 transitions. [2021-08-06 19:39:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:37,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:37,814 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:37,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2021-08-06 19:39:38,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-08-06 19:39:38,014 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:38,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2036214369, now seen corresponding path program 192 times [2021-08-06 19:39:38,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:38,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14881830] [2021-08-06 19:39:38,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:38,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:38,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:38,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14881830] [2021-08-06 19:39:38,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14881830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:38,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848243934] [2021-08-06 19:39:38,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:39:38,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:38,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:38,097 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:38,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2021-08-06 19:39:40,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:39:40,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:40,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:40,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:40,112 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:40,112 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:40,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848243934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:40,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:40,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:39:40,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977475656] [2021-08-06 19:39:40,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:39:40,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:40,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:39:40,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:39:40,132 INFO L87 Difference]: Start difference. First operand 1292 states and 2797 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:39:40,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:40,216 INFO L93 Difference]: Finished difference Result 1329 states and 2832 transitions. [2021-08-06 19:39:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:39:40,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 21 [2021-08-06 19:39:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:40,218 INFO L225 Difference]: With dead ends: 1329 [2021-08-06 19:39:40,218 INFO L226 Difference]: Without dead ends: 1327 [2021-08-06 19:39:40,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:39:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-08-06 19:39:40,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1276. [2021-08-06 19:39:40,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 2.164705882352941) internal successors, (2760), 1275 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:40,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 2760 transitions. [2021-08-06 19:39:40,231 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 2760 transitions. Word has length 21 [2021-08-06 19:39:40,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:40,231 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 2760 transitions. [2021-08-06 19:39:40,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:39:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 2760 transitions. [2021-08-06 19:39:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:40,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:40,232 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:40,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2021-08-06 19:39:40,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:40,433 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:40,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1038106532, now seen corresponding path program 193 times [2021-08-06 19:39:40,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:40,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096902292] [2021-08-06 19:39:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:40,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:40,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:40,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096902292] [2021-08-06 19:39:40,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096902292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:40,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864651171] [2021-08-06 19:39:40,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:39:40,501 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:40,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:40,502 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:40,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2021-08-06 19:39:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:42,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:42,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:42,530 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:42,531 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:42,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864651171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:42,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:42,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:39:42,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815403244] [2021-08-06 19:39:42,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:39:42,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:42,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:39:42,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:39:42,548 INFO L87 Difference]: Start difference. First operand 1276 states and 2760 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:39:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:42,618 INFO L93 Difference]: Finished difference Result 1401 states and 2960 transitions. [2021-08-06 19:39:42,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:39:42,619 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 21 [2021-08-06 19:39:42,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:42,620 INFO L225 Difference]: With dead ends: 1401 [2021-08-06 19:39:42,620 INFO L226 Difference]: Without dead ends: 1401 [2021-08-06 19:39:42,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:39:42,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-08-06 19:39:42,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1256. [2021-08-06 19:39:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 2.154581673306773) internal successors, (2704), 1255 states have internal predecessors, (2704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 2704 transitions. [2021-08-06 19:39:42,633 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 2704 transitions. Word has length 21 [2021-08-06 19:39:42,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:42,633 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 2704 transitions. [2021-08-06 19:39:42,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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) [2021-08-06 19:39:42,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 2704 transitions. [2021-08-06 19:39:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:42,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:42,635 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:42,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2021-08-06 19:39:42,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:42,835 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:42,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:42,835 INFO L82 PathProgramCache]: Analyzing trace with hash 206947873, now seen corresponding path program 194 times [2021-08-06 19:39:42,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:42,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957466253] [2021-08-06 19:39:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:42,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:42,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:42,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957466253] [2021-08-06 19:39:42,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957466253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:42,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842222687] [2021-08-06 19:39:42,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:39:42,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:42,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:42,934 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:42,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2021-08-06 19:39:44,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:39:44,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:44,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:44,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:44,960 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:44,960 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:44,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842222687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:44,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:44,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:39:44,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675475869] [2021-08-06 19:39:44,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:39:44,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:44,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:39:44,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:39:44,980 INFO L87 Difference]: Start difference. First operand 1256 states and 2704 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-08-06 19:39:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:45,141 INFO L93 Difference]: Finished difference Result 1417 states and 3010 transitions. [2021-08-06 19:39:45,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:39:45,142 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 21 [2021-08-06 19:39:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:45,143 INFO L225 Difference]: With dead ends: 1417 [2021-08-06 19:39:45,143 INFO L226 Difference]: Without dead ends: 1417 [2021-08-06 19:39:45,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:39:45,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2021-08-06 19:39:45,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 987. [2021-08-06 19:39:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 2.1886409736308314) internal successors, (2158), 986 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) [2021-08-06 19:39:45,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 2158 transitions. [2021-08-06 19:39:45,155 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 2158 transitions. Word has length 21 [2021-08-06 19:39:45,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:45,156 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 2158 transitions. [2021-08-06 19:39:45,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-08-06 19:39:45,156 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 2158 transitions. [2021-08-06 19:39:45,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:45,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:45,157 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:45,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2021-08-06 19:39:45,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:45,357 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1749308955, now seen corresponding path program 195 times [2021-08-06 19:39:45,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:45,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819915034] [2021-08-06 19:39:45,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:45,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:45,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:45,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819915034] [2021-08-06 19:39:45,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819915034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:45,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455292862] [2021-08-06 19:39:45,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:39:45,420 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:45,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:45,421 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:45,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2021-08-06 19:39:47,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:39:47,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:47,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:47,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:47,448 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:47,449 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:47,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455292862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:47,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:47,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:39:47,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510217472] [2021-08-06 19:39:47,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:39:47,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:47,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:39:47,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:39:47,468 INFO L87 Difference]: Start difference. First operand 987 states and 2158 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:39:47,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:47,533 INFO L93 Difference]: Finished difference Result 1027 states and 2208 transitions. [2021-08-06 19:39:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:39:47,533 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:39:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:47,535 INFO L225 Difference]: With dead ends: 1027 [2021-08-06 19:39:47,535 INFO L226 Difference]: Without dead ends: 1026 [2021-08-06 19:39:47,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:39:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-08-06 19:39:47,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 998. [2021-08-06 19:39:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 2.189568706118355) internal successors, (2183), 997 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 2183 transitions. [2021-08-06 19:39:47,547 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 2183 transitions. Word has length 21 [2021-08-06 19:39:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:47,547 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 2183 transitions. [2021-08-06 19:39:47,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:39:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 2183 transitions. [2021-08-06 19:39:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:47,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:47,549 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:47,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2021-08-06 19:39:47,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:47,749 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:47,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1781505982, now seen corresponding path program 196 times [2021-08-06 19:39:47,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:47,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350739482] [2021-08-06 19:39:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:47,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:47,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:47,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350739482] [2021-08-06 19:39:47,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350739482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:47,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354205316] [2021-08-06 19:39:47,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:39:47,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:47,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:47,816 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:47,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2021-08-06 19:39:49,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:39:49,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:49,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:49,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:49,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:49,831 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:39:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:49,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354205316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:49,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:49,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:39:49,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5546484] [2021-08-06 19:39:49,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:39:49,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:49,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:39:49,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:39:49,848 INFO L87 Difference]: Start difference. First operand 998 states and 2183 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:39:49,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:49,897 INFO L93 Difference]: Finished difference Result 1141 states and 2420 transitions. [2021-08-06 19:39:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:39:49,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:39:49,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:49,899 INFO L225 Difference]: With dead ends: 1141 [2021-08-06 19:39:49,899 INFO L226 Difference]: Without dead ends: 1141 [2021-08-06 19:39:49,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:39:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-08-06 19:39:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 1014. [2021-08-06 19:39:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 2.202369200394867) internal successors, (2231), 1013 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:49,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 2231 transitions. [2021-08-06 19:39:49,908 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 2231 transitions. Word has length 21 [2021-08-06 19:39:49,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:49,908 INFO L470 AbstractCegarLoop]: Abstraction has 1014 states and 2231 transitions. [2021-08-06 19:39:49,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:39:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 2231 transitions. [2021-08-06 19:39:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:49,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:49,909 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:49,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2021-08-06 19:39:50,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-06 19:39:50,110 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:50,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:50,110 INFO L82 PathProgramCache]: Analyzing trace with hash -38695647, now seen corresponding path program 197 times [2021-08-06 19:39:50,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:50,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900874240] [2021-08-06 19:39:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:50,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:50,172 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:50,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:50,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900874240] [2021-08-06 19:39:50,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900874240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:50,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487094386] [2021-08-06 19:39:50,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:39:50,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:50,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:50,173 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:50,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2021-08-06 19:39:52,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:39:52,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:52,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:52,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:52,258 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:52,258 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:52,277 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:39:52,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487094386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:52,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:52,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-08-06 19:39:52,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799722706] [2021-08-06 19:39:52,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:39:52,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:52,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:39:52,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:39:52,278 INFO L87 Difference]: Start difference. First operand 1014 states and 2231 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:39:52,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:52,343 INFO L93 Difference]: Finished difference Result 1093 states and 2357 transitions. [2021-08-06 19:39:52,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:39:52,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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 21 [2021-08-06 19:39:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:52,345 INFO L225 Difference]: With dead ends: 1093 [2021-08-06 19:39:52,345 INFO L226 Difference]: Without dead ends: 1093 [2021-08-06 19:39:52,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:39:52,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-08-06 19:39:52,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1016. [2021-08-06 19:39:52,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.2019704433497536) internal successors, (2235), 1015 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2235 transitions. [2021-08-06 19:39:52,354 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2235 transitions. Word has length 21 [2021-08-06 19:39:52,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:52,354 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 2235 transitions. [2021-08-06 19:39:52,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 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) [2021-08-06 19:39:52,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2235 transitions. [2021-08-06 19:39:52,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:52,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:52,355 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:52,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2021-08-06 19:39:52,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-08-06 19:39:52,556 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:52,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:52,556 INFO L82 PathProgramCache]: Analyzing trace with hash 706006851, now seen corresponding path program 198 times [2021-08-06 19:39:52,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:52,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60925248] [2021-08-06 19:39:52,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:52,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:52,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:52,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60925248] [2021-08-06 19:39:52,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60925248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:52,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110666868] [2021-08-06 19:39:52,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:39:52,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:52,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:52,629 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:52,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2021-08-06 19:39:54,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:39:54,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:54,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:54,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:54,689 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:54,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110666868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:54,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:54,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:39:54,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211352173] [2021-08-06 19:39:54,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:39:54,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:54,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:39:54,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:39:54,712 INFO L87 Difference]: Start difference. First operand 1016 states and 2235 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:54,805 INFO L93 Difference]: Finished difference Result 1132 states and 2435 transitions. [2021-08-06 19:39:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:39:54,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:39:54,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:54,807 INFO L225 Difference]: With dead ends: 1132 [2021-08-06 19:39:54,807 INFO L226 Difference]: Without dead ends: 1132 [2021-08-06 19:39:54,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:39:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-08-06 19:39:54,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 988. [2021-08-06 19:39:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 2.2016210739614994) internal successors, (2173), 987 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 2173 transitions. [2021-08-06 19:39:54,817 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 2173 transitions. Word has length 21 [2021-08-06 19:39:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:54,817 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 2173 transitions. [2021-08-06 19:39:54,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:54,818 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 2173 transitions. [2021-08-06 19:39:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:54,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:54,819 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:54,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2021-08-06 19:39:55,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-06 19:39:55,019 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:55,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:55,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1978019487, now seen corresponding path program 199 times [2021-08-06 19:39:55,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:55,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682150938] [2021-08-06 19:39:55,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:55,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:55,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:55,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682150938] [2021-08-06 19:39:55,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682150938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:55,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775481481] [2021-08-06 19:39:55,091 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:39:55,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:55,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:55,092 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:55,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2021-08-06 19:39:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:57,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:57,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:57,165 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:57,165 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:39:57,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775481481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:57,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:57,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:39:57,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949986337] [2021-08-06 19:39:57,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:39:57,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:57,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:39:57,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:39:57,185 INFO L87 Difference]: Start difference. First operand 988 states and 2173 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:57,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:57,289 INFO L93 Difference]: Finished difference Result 1103 states and 2371 transitions. [2021-08-06 19:39:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:39:57,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:39:57,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:57,291 INFO L225 Difference]: With dead ends: 1103 [2021-08-06 19:39:57,291 INFO L226 Difference]: Without dead ends: 1103 [2021-08-06 19:39:57,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:39:57,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-08-06 19:39:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 991. [2021-08-06 19:39:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 2.201010101010101) internal successors, (2179), 990 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 2179 transitions. [2021-08-06 19:39:57,300 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 2179 transitions. Word has length 21 [2021-08-06 19:39:57,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:57,300 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 2179 transitions. [2021-08-06 19:39:57,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 2179 transitions. [2021-08-06 19:39:57,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:57,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:57,301 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:57,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2021-08-06 19:39:57,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-08-06 19:39:57,502 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:57,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:57,502 INFO L82 PathProgramCache]: Analyzing trace with hash 716509955, now seen corresponding path program 200 times [2021-08-06 19:39:57,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:57,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714755383] [2021-08-06 19:39:57,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:57,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:39:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:57,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:39:57,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714755383] [2021-08-06 19:39:57,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714755383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:57,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27965444] [2021-08-06 19:39:57,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:39:57,579 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:57,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:39:57,579 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:39:57,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2021-08-06 19:39:59,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:39:59,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:39:59,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:39:59,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:39:59,660 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:59,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:39:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:39:59,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27965444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:39:59,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:39:59,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:39:59,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589190625] [2021-08-06 19:39:59,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:39:59,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:39:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:39:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:39:59,682 INFO L87 Difference]: Start difference. First operand 991 states and 2179 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:39:59,777 INFO L93 Difference]: Finished difference Result 1078 states and 2326 transitions. [2021-08-06 19:39:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:39:59,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-08-06 19:39:59,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:39:59,778 INFO L225 Difference]: With dead ends: 1078 [2021-08-06 19:39:59,778 INFO L226 Difference]: Without dead ends: 1078 [2021-08-06 19:39:59,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:39:59,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-06 19:39:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 825. [2021-08-06 19:39:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.229368932038835) internal successors, (1837), 824 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:39:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1837 transitions. [2021-08-06 19:39:59,787 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1837 transitions. Word has length 21 [2021-08-06 19:39:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:39:59,787 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 1837 transitions. [2021-08-06 19:39:59,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:39:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1837 transitions. [2021-08-06 19:39:59,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:39:59,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:39:59,788 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:39:59,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2021-08-06 19:39:59,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:39:59,988 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:39:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:39:59,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1652423263, now seen corresponding path program 201 times [2021-08-06 19:39:59,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:39:59,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16136227] [2021-08-06 19:39:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:39:59,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:39:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:40:00,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:00,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16136227] [2021-08-06 19:40:00,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16136227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:00,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187733642] [2021-08-06 19:40:00,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:40:00,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:00,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:00,070 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:00,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2021-08-06 19:40:02,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:40:02,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:02,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:02,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:02,238 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:02,238 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:40:02,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187733642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:02,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:02,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:40:02,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317550762] [2021-08-06 19:40:02,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:40:02,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:02,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:40:02,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:40:02,261 INFO L87 Difference]: Start difference. First operand 825 states and 1837 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:40:02,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:02,339 INFO L93 Difference]: Finished difference Result 1015 states and 2211 transitions. [2021-08-06 19:40:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:40:02,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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 21 [2021-08-06 19:40:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:02,340 INFO L225 Difference]: With dead ends: 1015 [2021-08-06 19:40:02,340 INFO L226 Difference]: Without dead ends: 1015 [2021-08-06 19:40:02,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:40:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2021-08-06 19:40:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 954. [2021-08-06 19:40:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 2.200419727177335) internal successors, (2097), 953 states have internal predecessors, (2097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 2097 transitions. [2021-08-06 19:40:02,349 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 2097 transitions. Word has length 21 [2021-08-06 19:40:02,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:02,350 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 2097 transitions. [2021-08-06 19:40:02,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) 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) [2021-08-06 19:40:02,350 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 2097 transitions. [2021-08-06 19:40:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:02,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:02,350 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:02,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2021-08-06 19:40:02,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-08-06 19:40:02,551 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:02,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:02,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2074908989, now seen corresponding path program 202 times [2021-08-06 19:40:02,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:02,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362236949] [2021-08-06 19:40:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:02,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:02,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:02,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362236949] [2021-08-06 19:40:02,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362236949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:02,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47905073] [2021-08-06 19:40:02,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:40:02,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:02,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:02,644 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:02,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2021-08-06 19:40:04,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:40:04,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:04,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:04,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:04,814 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:04,815 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:04,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47905073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:04,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:04,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:40:04,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731578738] [2021-08-06 19:40:04,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:40:04,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:04,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:40:04,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:40:04,835 INFO L87 Difference]: Start difference. First operand 954 states and 2097 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-08-06 19:40:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:04,976 INFO L93 Difference]: Finished difference Result 1029 states and 2239 transitions. [2021-08-06 19:40:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:40:04,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 21 [2021-08-06 19:40:04,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:04,978 INFO L225 Difference]: With dead ends: 1029 [2021-08-06 19:40:04,978 INFO L226 Difference]: Without dead ends: 1029 [2021-08-06 19:40:04,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:40:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-08-06 19:40:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 912. [2021-08-06 19:40:04,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.2096597145993413) internal successors, (2013), 911 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) [2021-08-06 19:40:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2013 transitions. [2021-08-06 19:40:04,987 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2013 transitions. Word has length 21 [2021-08-06 19:40:04,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:04,987 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2013 transitions. [2021-08-06 19:40:04,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-08-06 19:40:04,987 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2013 transitions. [2021-08-06 19:40:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:04,988 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:04,988 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:05,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2021-08-06 19:40:05,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-06 19:40:05,189 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash 2007902689, now seen corresponding path program 203 times [2021-08-06 19:40:05,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:05,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762934237] [2021-08-06 19:40:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:05,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:05,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:05,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762934237] [2021-08-06 19:40:05,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762934237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:05,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640136815] [2021-08-06 19:40:05,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:40:05,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:05,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:05,297 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:05,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2021-08-06 19:40:07,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:40:07,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:07,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:07,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:07,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:07,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:07,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640136815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:07,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:07,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:40:07,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136715184] [2021-08-06 19:40:07,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:40:07,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:07,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:40:07,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:40:07,538 INFO L87 Difference]: Start difference. First operand 912 states and 2013 transitions. Second operand has 15 states, 15 states have (on average 1.6) 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) [2021-08-06 19:40:07,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:07,734 INFO L93 Difference]: Finished difference Result 1136 states and 2461 transitions. [2021-08-06 19:40:07,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:40:07,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) 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 21 [2021-08-06 19:40:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:07,735 INFO L225 Difference]: With dead ends: 1136 [2021-08-06 19:40:07,735 INFO L226 Difference]: Without dead ends: 1136 [2021-08-06 19:40:07,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=376, Invalid=746, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:40:07,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-08-06 19:40:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 943. [2021-08-06 19:40:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 2.20276008492569) internal successors, (2075), 942 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) [2021-08-06 19:40:07,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 2075 transitions. [2021-08-06 19:40:07,745 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 2075 transitions. Word has length 21 [2021-08-06 19:40:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:07,745 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 2075 transitions. [2021-08-06 19:40:07,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) 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) [2021-08-06 19:40:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 2075 transitions. [2021-08-06 19:40:07,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:07,746 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:07,746 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:07,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2021-08-06 19:40:07,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:07,947 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2141141745, now seen corresponding path program 204 times [2021-08-06 19:40:07,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:07,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78933170] [2021-08-06 19:40:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:07,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:08,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:08,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78933170] [2021-08-06 19:40:08,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78933170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:08,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583619378] [2021-08-06 19:40:08,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:40:08,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:08,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:08,073 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:08,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2021-08-06 19:40:10,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:40:10,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:10,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:10,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:10,221 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:40:10,222 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:40:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:10,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583619378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:10,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:10,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:40:10,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727051923] [2021-08-06 19:40:10,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:40:10,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:10,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:40:10,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:40:10,243 INFO L87 Difference]: Start difference. First operand 943 states and 2075 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:10,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:10,393 INFO L93 Difference]: Finished difference Result 1028 states and 2176 transitions. [2021-08-06 19:40:10,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:40:10,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:10,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:10,395 INFO L225 Difference]: With dead ends: 1028 [2021-08-06 19:40:10,395 INFO L226 Difference]: Without dead ends: 1025 [2021-08-06 19:40:10,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:40:10,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-08-06 19:40:10,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 951. [2021-08-06 19:40:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 2.205263157894737) internal successors, (2095), 950 states have internal predecessors, (2095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 2095 transitions. [2021-08-06 19:40:10,405 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 2095 transitions. Word has length 21 [2021-08-06 19:40:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:10,405 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 2095 transitions. [2021-08-06 19:40:10,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:10,405 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 2095 transitions. [2021-08-06 19:40:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:10,406 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:10,406 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:10,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2021-08-06 19:40:10,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-08-06 19:40:10,607 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:10,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1264569870, now seen corresponding path program 205 times [2021-08-06 19:40:10,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:10,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275432216] [2021-08-06 19:40:10,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:10,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:10,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:10,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:10,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275432216] [2021-08-06 19:40:10,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275432216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:10,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077567623] [2021-08-06 19:40:10,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:40:10,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:10,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:10,694 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:10,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2021-08-06 19:40:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:12,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:12,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:12,831 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:40:12,832 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:40:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:12,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077567623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:12,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:12,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:40:12,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712083437] [2021-08-06 19:40:12,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:40:12,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:12,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:40:12,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:40:12,850 INFO L87 Difference]: Start difference. First operand 951 states and 2095 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:12,963 INFO L93 Difference]: Finished difference Result 1087 states and 2336 transitions. [2021-08-06 19:40:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:40:12,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:12,965 INFO L225 Difference]: With dead ends: 1087 [2021-08-06 19:40:12,965 INFO L226 Difference]: Without dead ends: 1085 [2021-08-06 19:40:12,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:40:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2021-08-06 19:40:12,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 959. [2021-08-06 19:40:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.2077244258872653) internal successors, (2115), 958 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2115 transitions. [2021-08-06 19:40:12,974 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2115 transitions. Word has length 21 [2021-08-06 19:40:12,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:12,974 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 2115 transitions. [2021-08-06 19:40:12,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2115 transitions. [2021-08-06 19:40:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:12,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:12,976 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:12,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2021-08-06 19:40:13,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:13,176 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:13,177 INFO L82 PathProgramCache]: Analyzing trace with hash -26892627, now seen corresponding path program 206 times [2021-08-06 19:40:13,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:13,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291547281] [2021-08-06 19:40:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:13,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:13,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:13,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291547281] [2021-08-06 19:40:13,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291547281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:13,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963001336] [2021-08-06 19:40:13,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:40:13,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:13,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:13,277 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:13,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2021-08-06 19:40:15,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:40:15,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:15,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:15,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:15,468 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:15,469 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:15,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963001336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:15,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:15,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:40:15,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485002687] [2021-08-06 19:40:15,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:40:15,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:15,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:40:15,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:40:15,492 INFO L87 Difference]: Start difference. First operand 959 states and 2115 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:15,566 INFO L93 Difference]: Finished difference Result 1062 states and 2254 transitions. [2021-08-06 19:40:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:40:15,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:15,568 INFO L225 Difference]: With dead ends: 1062 [2021-08-06 19:40:15,568 INFO L226 Difference]: Without dead ends: 1062 [2021-08-06 19:40:15,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:40:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2021-08-06 19:40:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 960. [2021-08-06 19:40:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 2.202294056308655) internal successors, (2112), 959 states have internal predecessors, (2112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 2112 transitions. [2021-08-06 19:40:15,577 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 2112 transitions. Word has length 21 [2021-08-06 19:40:15,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:15,577 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 2112 transitions. [2021-08-06 19:40:15,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 2112 transitions. [2021-08-06 19:40:15,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:15,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:15,578 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:15,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2021-08-06 19:40:15,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-08-06 19:40:15,778 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:15,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:15,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1360365357, now seen corresponding path program 207 times [2021-08-06 19:40:15,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:15,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596401514] [2021-08-06 19:40:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:15,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:40:15,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:15,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596401514] [2021-08-06 19:40:15,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596401514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:15,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942427070] [2021-08-06 19:40:15,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:40:15,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:15,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:15,860 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:15,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2021-08-06 19:40:17,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:40:17,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:17,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:17,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:18,049 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:18,050 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:40:18,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942427070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:18,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:18,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:40:18,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528036139] [2021-08-06 19:40:18,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:40:18,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:18,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:40:18,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:40:18,070 INFO L87 Difference]: Start difference. First operand 960 states and 2112 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:18,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:18,142 INFO L93 Difference]: Finished difference Result 1073 states and 2330 transitions. [2021-08-06 19:40:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:40:18,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:18,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:18,143 INFO L225 Difference]: With dead ends: 1073 [2021-08-06 19:40:18,143 INFO L226 Difference]: Without dead ends: 1073 [2021-08-06 19:40:18,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:40:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-08-06 19:40:18,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1021. [2021-08-06 19:40:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 2.1901960784313728) internal successors, (2234), 1020 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 2234 transitions. [2021-08-06 19:40:18,154 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 2234 transitions. Word has length 21 [2021-08-06 19:40:18,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:18,154 INFO L470 AbstractCegarLoop]: Abstraction has 1021 states and 2234 transitions. [2021-08-06 19:40:18,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:18,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 2234 transitions. [2021-08-06 19:40:18,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:18,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:18,155 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:18,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2021-08-06 19:40:18,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-08-06 19:40:18,356 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:18,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:18,356 INFO L82 PathProgramCache]: Analyzing trace with hash 937879631, now seen corresponding path program 208 times [2021-08-06 19:40:18,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:18,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985174762] [2021-08-06 19:40:18,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:18,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:18,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:18,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985174762] [2021-08-06 19:40:18,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985174762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:18,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474362559] [2021-08-06 19:40:18,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:40:18,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:18,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:18,458 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:18,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2021-08-06 19:40:20,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:40:20,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:20,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:20,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:20,621 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:20,621 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:20,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474362559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:20,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:20,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:40:20,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256000813] [2021-08-06 19:40:20,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:40:20,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:20,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:40:20,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:40:20,641 INFO L87 Difference]: Start difference. First operand 1021 states and 2234 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:20,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:20,772 INFO L93 Difference]: Finished difference Result 1074 states and 2332 transitions. [2021-08-06 19:40:20,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:40:20,772 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:20,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:20,773 INFO L225 Difference]: With dead ends: 1074 [2021-08-06 19:40:20,773 INFO L226 Difference]: Without dead ends: 1074 [2021-08-06 19:40:20,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:40:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-08-06 19:40:20,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 952. [2021-08-06 19:40:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 2.2018927444794953) internal successors, (2094), 951 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) [2021-08-06 19:40:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 2094 transitions. [2021-08-06 19:40:20,783 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 2094 transitions. Word has length 21 [2021-08-06 19:40:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:20,783 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 2094 transitions. [2021-08-06 19:40:20,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:20,783 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 2094 transitions. [2021-08-06 19:40:20,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:20,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:20,784 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:20,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2021-08-06 19:40:20,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-08-06 19:40:20,985 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:20,985 INFO L82 PathProgramCache]: Analyzing trace with hash 725724013, now seen corresponding path program 209 times [2021-08-06 19:40:20,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:20,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491741503] [2021-08-06 19:40:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:20,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:21,084 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:21,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:21,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491741503] [2021-08-06 19:40:21,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491741503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:21,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193363869] [2021-08-06 19:40:21,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:40:21,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:21,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:21,085 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:21,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2021-08-06 19:40:23,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:40:23,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:23,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:23,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:23,287 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:23,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:23,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193363869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:23,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:23,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:40:23,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362278372] [2021-08-06 19:40:23,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:40:23,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:23,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:40:23,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:40:23,308 INFO L87 Difference]: Start difference. First operand 952 states and 2094 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:23,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:23,513 INFO L93 Difference]: Finished difference Result 1119 states and 2428 transitions. [2021-08-06 19:40:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:40:23,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:23,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:23,515 INFO L225 Difference]: With dead ends: 1119 [2021-08-06 19:40:23,515 INFO L226 Difference]: Without dead ends: 1119 [2021-08-06 19:40:23,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=356, Invalid=700, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:40:23,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-08-06 19:40:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 938. [2021-08-06 19:40:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 2.2049092849519742) internal successors, (2066), 937 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) [2021-08-06 19:40:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2066 transitions. [2021-08-06 19:40:23,524 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2066 transitions. Word has length 21 [2021-08-06 19:40:23,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:23,524 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 2066 transitions. [2021-08-06 19:40:23,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2066 transitions. [2021-08-06 19:40:23,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:23,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:23,525 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:23,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2021-08-06 19:40:23,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-08-06 19:40:23,726 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:23,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:23,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1677087729, now seen corresponding path program 210 times [2021-08-06 19:40:23,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:23,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006334416] [2021-08-06 19:40:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:23,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:23,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:23,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006334416] [2021-08-06 19:40:23,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006334416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:23,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301627262] [2021-08-06 19:40:23,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:40:23,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:23,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:23,808 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:23,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2021-08-06 19:40:25,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:40:25,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:25,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:25,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:26,018 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:40:26,018 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:40:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:26,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301627262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:26,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:26,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:40:26,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837649848] [2021-08-06 19:40:26,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:40:26,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:26,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:40:26,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:40:26,039 INFO L87 Difference]: Start difference. First operand 938 states and 2066 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:26,158 INFO L93 Difference]: Finished difference Result 1005 states and 2144 transitions. [2021-08-06 19:40:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:40:26,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:26,160 INFO L225 Difference]: With dead ends: 1005 [2021-08-06 19:40:26,160 INFO L226 Difference]: Without dead ends: 1003 [2021-08-06 19:40:26,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:40:26,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-08-06 19:40:26,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 947. [2021-08-06 19:40:26,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 2.208245243128964) internal successors, (2089), 946 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 2089 transitions. [2021-08-06 19:40:26,172 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 2089 transitions. Word has length 21 [2021-08-06 19:40:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:26,173 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 2089 transitions. [2021-08-06 19:40:26,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:26,173 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 2089 transitions. [2021-08-06 19:40:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:26,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:26,174 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:26,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2021-08-06 19:40:26,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-08-06 19:40:26,374 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:26,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:26,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1619771730, now seen corresponding path program 211 times [2021-08-06 19:40:26,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:26,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676375494] [2021-08-06 19:40:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:26,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:26,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:26,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676375494] [2021-08-06 19:40:26,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676375494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:26,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838079955] [2021-08-06 19:40:26,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:40:26,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:26,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:26,456 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:26,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2021-08-06 19:40:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:28,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:28,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:28,687 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:40:28,688 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:40:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:28,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838079955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:28,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:28,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:40:28,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446154210] [2021-08-06 19:40:28,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:40:28,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:28,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:40:28,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:40:28,706 INFO L87 Difference]: Start difference. First operand 947 states and 2089 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:28,790 INFO L93 Difference]: Finished difference Result 1138 states and 2437 transitions. [2021-08-06 19:40:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:40:28,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:28,791 INFO L225 Difference]: With dead ends: 1138 [2021-08-06 19:40:28,791 INFO L226 Difference]: Without dead ends: 1138 [2021-08-06 19:40:28,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:40:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-08-06 19:40:28,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1000. [2021-08-06 19:40:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 2.214214214214214) internal successors, (2212), 999 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) [2021-08-06 19:40:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 2212 transitions. [2021-08-06 19:40:28,801 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 2212 transitions. Word has length 21 [2021-08-06 19:40:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:28,801 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 2212 transitions. [2021-08-06 19:40:28,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 2212 transitions. [2021-08-06 19:40:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:28,802 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:28,802 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:28,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2021-08-06 19:40:29,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-08-06 19:40:29,003 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:29,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:29,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1522930575, now seen corresponding path program 212 times [2021-08-06 19:40:29,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:29,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251168528] [2021-08-06 19:40:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:29,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:29,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:29,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251168528] [2021-08-06 19:40:29,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251168528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:29,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663826144] [2021-08-06 19:40:29,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:40:29,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:29,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:29,078 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:29,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2021-08-06 19:40:31,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:40:31,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:31,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:31,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:31,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:31,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:31,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663826144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:31,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:31,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:40:31,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496075705] [2021-08-06 19:40:31,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:40:31,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:31,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:40:31,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:40:31,298 INFO L87 Difference]: Start difference. First operand 1000 states and 2212 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:31,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:31,384 INFO L93 Difference]: Finished difference Result 1150 states and 2455 transitions. [2021-08-06 19:40:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:40:31,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:31,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:31,386 INFO L225 Difference]: With dead ends: 1150 [2021-08-06 19:40:31,386 INFO L226 Difference]: Without dead ends: 1150 [2021-08-06 19:40:31,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:40:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-08-06 19:40:31,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1006. [2021-08-06 19:40:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 2.2129353233830846) internal successors, (2224), 1005 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 2224 transitions. [2021-08-06 19:40:31,397 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 2224 transitions. Word has length 21 [2021-08-06 19:40:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:31,397 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 2224 transitions. [2021-08-06 19:40:31,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 2224 transitions. [2021-08-06 19:40:31,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:31,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:31,398 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:31,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2021-08-06 19:40:31,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:31,599 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:31,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1705399409, now seen corresponding path program 213 times [2021-08-06 19:40:31,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:31,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608320568] [2021-08-06 19:40:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:31,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:31,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:31,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608320568] [2021-08-06 19:40:31,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608320568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:31,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639137634] [2021-08-06 19:40:31,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:40:31,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:31,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:31,698 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:31,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2021-08-06 19:40:33,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:40:33,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:33,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:33,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:33,911 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:33,912 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:33,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639137634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:33,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:33,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:40:33,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537805857] [2021-08-06 19:40:33,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:40:33,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:33,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:40:33,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:40:33,932 INFO L87 Difference]: Start difference. First operand 1006 states and 2224 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:34,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:34,095 INFO L93 Difference]: Finished difference Result 1246 states and 2704 transitions. [2021-08-06 19:40:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 19:40:34,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:34,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:34,096 INFO L225 Difference]: With dead ends: 1246 [2021-08-06 19:40:34,096 INFO L226 Difference]: Without dead ends: 1246 [2021-08-06 19:40:34,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:40:34,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-08-06 19:40:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1181. [2021-08-06 19:40:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 2.18135593220339) internal successors, (2574), 1180 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:34,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 2574 transitions. [2021-08-06 19:40:34,108 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 2574 transitions. Word has length 21 [2021-08-06 19:40:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:34,108 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 2574 transitions. [2021-08-06 19:40:34,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 2574 transitions. [2021-08-06 19:40:34,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:34,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:34,109 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:34,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2021-08-06 19:40:34,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:34,310 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1109237553, now seen corresponding path program 214 times [2021-08-06 19:40:34,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:34,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854169655] [2021-08-06 19:40:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:34,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:34,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:34,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854169655] [2021-08-06 19:40:34,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854169655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:34,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822597222] [2021-08-06 19:40:34,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:40:34,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:34,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:34,386 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:34,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2021-08-06 19:40:36,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:40:36,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:36,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:36,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:36,650 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:40:36,651 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:40:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:36,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822597222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:36,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:36,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:40:36,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830093360] [2021-08-06 19:40:36,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:40:36,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:36,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:40:36,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:40:36,673 INFO L87 Difference]: Start difference. First operand 1181 states and 2574 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:36,770 INFO L93 Difference]: Finished difference Result 1243 states and 2646 transitions. [2021-08-06 19:40:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:40:36,770 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:36,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:36,772 INFO L225 Difference]: With dead ends: 1243 [2021-08-06 19:40:36,772 INFO L226 Difference]: Without dead ends: 1242 [2021-08-06 19:40:36,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:40:36,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-08-06 19:40:36,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1192. [2021-08-06 19:40:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 2.184718723761545) internal successors, (2602), 1191 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2602 transitions. [2021-08-06 19:40:36,784 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2602 transitions. Word has length 21 [2021-08-06 19:40:36,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:36,784 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 2602 transitions. [2021-08-06 19:40:36,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:36,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2602 transitions. [2021-08-06 19:40:36,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:36,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:36,786 INFO L512 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:36,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2021-08-06 19:40:36,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-08-06 19:40:36,986 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:36,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:36,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1077040526, now seen corresponding path program 215 times [2021-08-06 19:40:36,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:36,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529759025] [2021-08-06 19:40:36,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:36,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:37,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:37,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529759025] [2021-08-06 19:40:37,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529759025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:37,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134514867] [2021-08-06 19:40:37,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:40:37,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:37,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:37,059 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:37,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2021-08-06 19:40:39,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:40:39,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:39,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:39,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:40:39,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 19:40:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:39,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134514867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:39,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:39,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:40:39,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086701209] [2021-08-06 19:40:39,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:40:39,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:39,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:40:39,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:40:39,329 INFO L87 Difference]: Start difference. First operand 1192 states and 2602 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:39,386 INFO L93 Difference]: Finished difference Result 1540 states and 3253 transitions. [2021-08-06 19:40:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:40:39,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:39,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:39,388 INFO L225 Difference]: With dead ends: 1540 [2021-08-06 19:40:39,388 INFO L226 Difference]: Without dead ends: 1540 [2021-08-06 19:40:39,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:40:39,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-08-06 19:40:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1411. [2021-08-06 19:40:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1410 states have (on average 2.175886524822695) internal successors, (3068), 1410 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 3068 transitions. [2021-08-06 19:40:39,401 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 3068 transitions. Word has length 21 [2021-08-06 19:40:39,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:39,401 INFO L470 AbstractCegarLoop]: Abstraction has 1411 states and 3068 transitions. [2021-08-06 19:40:39,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 3068 transitions. [2021-08-06 19:40:39,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:39,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:39,403 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:39,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2021-08-06 19:40:39,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:39,603 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:39,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:39,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1475116435, now seen corresponding path program 216 times [2021-08-06 19:40:39,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:39,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715255721] [2021-08-06 19:40:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:39,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:39,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:39,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715255721] [2021-08-06 19:40:39,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715255721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:39,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382852626] [2021-08-06 19:40:39,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:40:39,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:39,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:39,678 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:39,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2021-08-06 19:40:41,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:40:41,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:41,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:41,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:41,947 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:41,948 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:41,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382852626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:41,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:41,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:40:41,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882448402] [2021-08-06 19:40:41,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:40:41,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:41,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:40:41,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:40:41,968 INFO L87 Difference]: Start difference. First operand 1411 states and 3068 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:42,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:42,051 INFO L93 Difference]: Finished difference Result 1532 states and 3254 transitions. [2021-08-06 19:40:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:40:42,051 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:42,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:42,053 INFO L225 Difference]: With dead ends: 1532 [2021-08-06 19:40:42,053 INFO L226 Difference]: Without dead ends: 1532 [2021-08-06 19:40:42,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:40:42,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-08-06 19:40:42,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1415. [2021-08-06 19:40:42,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1414 states have (on average 2.1753889674681752) internal successors, (3076), 1414 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 3076 transitions. [2021-08-06 19:40:42,068 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 3076 transitions. Word has length 21 [2021-08-06 19:40:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:42,068 INFO L470 AbstractCegarLoop]: Abstraction has 1415 states and 3076 transitions. [2021-08-06 19:40:42,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:42,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 3076 transitions. [2021-08-06 19:40:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:42,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:42,069 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:42,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2021-08-06 19:40:42,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-08-06 19:40:42,270 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:42,270 INFO L82 PathProgramCache]: Analyzing trace with hash -730413937, now seen corresponding path program 217 times [2021-08-06 19:40:42,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:42,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527006018] [2021-08-06 19:40:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:42,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:42,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:42,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527006018] [2021-08-06 19:40:42,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527006018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:42,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583975111] [2021-08-06 19:40:42,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:40:42,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:42,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:42,356 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:42,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2021-08-06 19:40:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:44,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:44,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:44,629 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:44,630 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:40:44,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583975111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:44,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:44,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-08-06 19:40:44,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550146985] [2021-08-06 19:40:44,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:40:44,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:44,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:40:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:40:44,651 INFO L87 Difference]: Start difference. First operand 1415 states and 3076 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:44,759 INFO L93 Difference]: Finished difference Result 1516 states and 3257 transitions. [2021-08-06 19:40:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 19:40:44,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:44,761 INFO L225 Difference]: With dead ends: 1516 [2021-08-06 19:40:44,761 INFO L226 Difference]: Without dead ends: 1516 [2021-08-06 19:40:44,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:40:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-08-06 19:40:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1431. [2021-08-06 19:40:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 2.1755244755244756) internal successors, (3111), 1430 states have internal predecessors, (3111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 3111 transitions. [2021-08-06 19:40:44,775 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 3111 transitions. Word has length 21 [2021-08-06 19:40:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:44,776 INFO L470 AbstractCegarLoop]: Abstraction has 1431 states and 3111 transitions. [2021-08-06 19:40:44,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 3111 transitions. [2021-08-06 19:40:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:44,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:44,777 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:44,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2021-08-06 19:40:44,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:44,978 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:44,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:44,978 INFO L82 PathProgramCache]: Analyzing trace with hash 880527021, now seen corresponding path program 218 times [2021-08-06 19:40:44,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:44,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997308802] [2021-08-06 19:40:44,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:44,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:45,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:45,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997308802] [2021-08-06 19:40:45,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997308802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:45,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933950006] [2021-08-06 19:40:45,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:40:45,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:45,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:45,054 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:45,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2021-08-06 19:40:47,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:40:47,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:47,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:47,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:47,356 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:47,356 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:47,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933950006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:47,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:47,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:40:47,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950483791] [2021-08-06 19:40:47,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:40:47,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:47,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:40:47,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:40:47,377 INFO L87 Difference]: Start difference. First operand 1431 states and 3111 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:47,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:47,508 INFO L93 Difference]: Finished difference Result 1536 states and 3297 transitions. [2021-08-06 19:40:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:40:47,508 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:47,510 INFO L225 Difference]: With dead ends: 1536 [2021-08-06 19:40:47,510 INFO L226 Difference]: Without dead ends: 1536 [2021-08-06 19:40:47,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:40:47,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-08-06 19:40:47,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1433. [2021-08-06 19:40:47,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 2.1752793296089385) internal successors, (3115), 1432 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 3115 transitions. [2021-08-06 19:40:47,527 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 3115 transitions. Word has length 21 [2021-08-06 19:40:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:47,527 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 3115 transitions. [2021-08-06 19:40:47,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 3115 transitions. [2021-08-06 19:40:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:47,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:47,528 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:47,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2021-08-06 19:40:47,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-08-06 19:40:47,729 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:47,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:47,729 INFO L82 PathProgramCache]: Analyzing trace with hash -719910833, now seen corresponding path program 219 times [2021-08-06 19:40:47,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:47,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519208316] [2021-08-06 19:40:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:47,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:40:47,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:47,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519208316] [2021-08-06 19:40:47,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519208316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:47,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814424403] [2021-08-06 19:40:47,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:40:47,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:47,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:47,811 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:47,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2021-08-06 19:40:50,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:40:50,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:50,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:50,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:50,080 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:50,080 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:40:50,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814424403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:50,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:50,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-06 19:40:50,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903330793] [2021-08-06 19:40:50,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:40:50,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:50,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:40:50,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:40:50,101 INFO L87 Difference]: Start difference. First operand 1433 states and 3115 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:50,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:50,224 INFO L93 Difference]: Finished difference Result 1702 states and 3647 transitions. [2021-08-06 19:40:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:40:50,225 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:50,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:50,227 INFO L225 Difference]: With dead ends: 1702 [2021-08-06 19:40:50,227 INFO L226 Difference]: Without dead ends: 1702 [2021-08-06 19:40:50,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:40:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2021-08-06 19:40:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1630. [2021-08-06 19:40:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 2.1553100061387354) internal successors, (3511), 1629 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:50,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 3511 transitions. [2021-08-06 19:40:50,245 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 3511 transitions. Word has length 21 [2021-08-06 19:40:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:50,245 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 3511 transitions. [2021-08-06 19:40:50,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:50,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 3511 transitions. [2021-08-06 19:40:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:50,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:50,246 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:50,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2021-08-06 19:40:50,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-08-06 19:40:50,447 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:50,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:50,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1206123245, now seen corresponding path program 220 times [2021-08-06 19:40:50,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:50,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935314711] [2021-08-06 19:40:50,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:50,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:50,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:50,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935314711] [2021-08-06 19:40:50,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935314711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:50,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641655235] [2021-08-06 19:40:50,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:40:50,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:50,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:50,528 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:50,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2021-08-06 19:40:52,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:40:52,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:52,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:52,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:52,881 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:52,882 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:52,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641655235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:52,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:52,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:40:52,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552134805] [2021-08-06 19:40:52,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:40:52,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:52,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:40:52,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:40:52,911 INFO L87 Difference]: Start difference. First operand 1630 states and 3511 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:53,020 INFO L93 Difference]: Finished difference Result 1676 states and 3595 transitions. [2021-08-06 19:40:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:40:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:53,022 INFO L225 Difference]: With dead ends: 1676 [2021-08-06 19:40:53,022 INFO L226 Difference]: Without dead ends: 1676 [2021-08-06 19:40:53,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:40:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-08-06 19:40:53,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1619. [2021-08-06 19:40:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 2.1563658838071693) internal successors, (3489), 1618 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 3489 transitions. [2021-08-06 19:40:53,038 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 3489 transitions. Word has length 21 [2021-08-06 19:40:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:53,038 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 3489 transitions. [2021-08-06 19:40:53,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 3489 transitions. [2021-08-06 19:40:53,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:53,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:53,040 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:53,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2021-08-06 19:40:53,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-08-06 19:40:53,240 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:53,241 INFO L82 PathProgramCache]: Analyzing trace with hash 783637519, now seen corresponding path program 221 times [2021-08-06 19:40:53,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:53,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314852176] [2021-08-06 19:40:53,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:53,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:40:53,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:53,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314852176] [2021-08-06 19:40:53,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314852176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:53,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692233537] [2021-08-06 19:40:53,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:40:53,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:53,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:53,326 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:53,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2021-08-06 19:40:55,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:40:55,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:55,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:55,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:55,628 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:55,629 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:40:55,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692233537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:55,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:55,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:40:55,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896136542] [2021-08-06 19:40:55,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:40:55,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:55,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:40:55,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:40:55,649 INFO L87 Difference]: Start difference. First operand 1619 states and 3489 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:55,745 INFO L93 Difference]: Finished difference Result 1895 states and 4041 transitions. [2021-08-06 19:40:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:40:55,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:55,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:55,747 INFO L225 Difference]: With dead ends: 1895 [2021-08-06 19:40:55,747 INFO L226 Difference]: Without dead ends: 1895 [2021-08-06 19:40:55,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:40:55,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-08-06 19:40:55,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1805. [2021-08-06 19:40:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 1804 states have (on average 2.1402439024390243) internal successors, (3861), 1804 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 3861 transitions. [2021-08-06 19:40:55,765 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 3861 transitions. Word has length 21 [2021-08-06 19:40:55,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:55,765 INFO L470 AbstractCegarLoop]: Abstraction has 1805 states and 3861 transitions. [2021-08-06 19:40:55,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 3861 transitions. [2021-08-06 19:40:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:55,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:55,766 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:55,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2021-08-06 19:40:55,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-08-06 19:40:55,967 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:55,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:55,967 INFO L82 PathProgramCache]: Analyzing trace with hash 571481901, now seen corresponding path program 222 times [2021-08-06 19:40:55,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:55,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481088341] [2021-08-06 19:40:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:55,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:56,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:56,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481088341] [2021-08-06 19:40:56,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481088341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:56,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565076141] [2021-08-06 19:40:56,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:40:56,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:56,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:56,061 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:56,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2021-08-06 19:40:58,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:40:58,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:40:58,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:40:58,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:40:58,293 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:58,294 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:40:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:58,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565076141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:58,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:40:58,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:40:58,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189102467] [2021-08-06 19:40:58,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:40:58,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:40:58,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:40:58,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:40:58,314 INFO L87 Difference]: Start difference. First operand 1805 states and 3861 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:40:58,454 INFO L93 Difference]: Finished difference Result 1936 states and 4123 transitions. [2021-08-06 19:40:58,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:40:58,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:40:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:40:58,457 INFO L225 Difference]: With dead ends: 1936 [2021-08-06 19:40:58,457 INFO L226 Difference]: Without dead ends: 1936 [2021-08-06 19:40:58,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:40:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-08-06 19:40:58,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1809. [2021-08-06 19:40:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1808 states have (on average 2.139933628318584) internal successors, (3869), 1808 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 3869 transitions. [2021-08-06 19:40:58,478 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 3869 transitions. Word has length 21 [2021-08-06 19:40:58,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:40:58,478 INFO L470 AbstractCegarLoop]: Abstraction has 1809 states and 3869 transitions. [2021-08-06 19:40:58,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:40:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 3869 transitions. [2021-08-06 19:40:58,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:40:58,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:40:58,480 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:40:58,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2021-08-06 19:40:58,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:58,680 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:40:58,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:40:58,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1710374961, now seen corresponding path program 223 times [2021-08-06 19:40:58,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:40:58,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735120208] [2021-08-06 19:40:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:40:58,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:40:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:40:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:40:58,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:40:58,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735120208] [2021-08-06 19:40:58,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735120208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:40:58,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673483279] [2021-08-06 19:40:58,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:40:58,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:40:58,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:40:58,793 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:40:58,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2021-08-06 19:41:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:00,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-06 19:41:00,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:01,069 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:41:01,070 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:41:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:01,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673483279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:01,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:01,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:41:01,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275164748] [2021-08-06 19:41:01,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:41:01,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:41:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:41:01,090 INFO L87 Difference]: Start difference. First operand 1809 states and 3869 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:01,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:01,274 INFO L93 Difference]: Finished difference Result 2147 states and 4545 transitions. [2021-08-06 19:41:01,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:41:01,275 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 19:41:01,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:01,277 INFO L225 Difference]: With dead ends: 2147 [2021-08-06 19:41:01,277 INFO L226 Difference]: Without dead ends: 2147 [2021-08-06 19:41:01,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=338, Invalid=654, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:41:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2021-08-06 19:41:01,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 1869. [2021-08-06 19:41:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 2.1354389721627407) internal successors, (3989), 1868 states have internal predecessors, (3989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:01,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 3989 transitions. [2021-08-06 19:41:01,297 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 3989 transitions. Word has length 21 [2021-08-06 19:41:01,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:01,297 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 3989 transitions. [2021-08-06 19:41:01,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:01,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 3989 transitions. [2021-08-06 19:41:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:41:01,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:01,299 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:01,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2021-08-06 19:41:01,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:01,499 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:01,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:01,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1344976692, now seen corresponding path program 224 times [2021-08-06 19:41:01,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:01,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395313019] [2021-08-06 19:41:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:01,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:01,730 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:01,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:01,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395313019] [2021-08-06 19:41:01,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395313019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:01,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343665343] [2021-08-06 19:41:01,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:41:01,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:01,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:01,731 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:01,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2021-08-06 19:41:03,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:41:03,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:03,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:41:03,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:04,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:41:04,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:41:10,172 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:10,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343665343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:10,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:10,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 19:41:10,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311839842] [2021-08-06 19:41:10,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:41:10,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:41:10,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:41:10,173 INFO L87 Difference]: Start difference. First operand 1869 states and 3989 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:10,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:10,640 INFO L93 Difference]: Finished difference Result 1938 states and 4114 transitions. [2021-08-06 19:41:10,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:41:10,640 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:41:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:10,643 INFO L225 Difference]: With dead ends: 1938 [2021-08-06 19:41:10,643 INFO L226 Difference]: Without dead ends: 1916 [2021-08-06 19:41:10,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 622.7ms TimeCoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:41:10,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-08-06 19:41:10,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1889. [2021-08-06 19:41:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1888 states have (on average 2.1403601694915255) internal successors, (4041), 1888 states have internal predecessors, (4041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 4041 transitions. [2021-08-06 19:41:10,662 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 4041 transitions. Word has length 22 [2021-08-06 19:41:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:10,662 INFO L470 AbstractCegarLoop]: Abstraction has 1889 states and 4041 transitions. [2021-08-06 19:41:10,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 4041 transitions. [2021-08-06 19:41:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:41:10,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:10,664 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:10,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2021-08-06 19:41:10,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-08-06 19:41:10,864 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:10,864 INFO L82 PathProgramCache]: Analyzing trace with hash 271033908, now seen corresponding path program 225 times [2021-08-06 19:41:10,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:10,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011595069] [2021-08-06 19:41:10,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:10,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:11,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:11,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011595069] [2021-08-06 19:41:11,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011595069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:11,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996197789] [2021-08-06 19:41:11,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:41:11,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:11,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:11,046 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:11,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2021-08-06 19:41:13,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:41:13,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:13,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 19:41:13,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:13,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:41:13,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:41:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:16,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996197789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:16,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:16,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:41:16,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257218749] [2021-08-06 19:41:16,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:41:16,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:16,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:41:16,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:41:16,946 INFO L87 Difference]: Start difference. First operand 1889 states and 4041 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:17,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:17,365 INFO L93 Difference]: Finished difference Result 1962 states and 4174 transitions. [2021-08-06 19:41:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:41:17,365 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:41:17,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:17,368 INFO L225 Difference]: With dead ends: 1962 [2021-08-06 19:41:17,368 INFO L226 Difference]: Without dead ends: 1951 [2021-08-06 19:41:17,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 375.8ms TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:41:17,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2021-08-06 19:41:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1910. [2021-08-06 19:41:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1909 states have (on average 2.148768988999476) internal successors, (4102), 1909 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:17,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 4102 transitions. [2021-08-06 19:41:17,387 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 4102 transitions. Word has length 22 [2021-08-06 19:41:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:17,387 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 4102 transitions. [2021-08-06 19:41:17,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 4102 transitions. [2021-08-06 19:41:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:41:17,389 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:17,389 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:17,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:17,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-08-06 19:41:17,590 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:17,590 INFO L82 PathProgramCache]: Analyzing trace with hash -5126494, now seen corresponding path program 226 times [2021-08-06 19:41:17,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:17,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680508083] [2021-08-06 19:41:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:17,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:17,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:17,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680508083] [2021-08-06 19:41:17,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680508083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:17,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617309192] [2021-08-06 19:41:17,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:41:17,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:17,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:17,752 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:17,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2021-08-06 19:41:20,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:41:20,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:20,026 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:41:20,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:20,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:41:20,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:41:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:24,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617309192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:24,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:24,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:41:24,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063859154] [2021-08-06 19:41:24,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:41:24,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:24,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:41:24,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:41:24,787 INFO L87 Difference]: Start difference. First operand 1910 states and 4102 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:25,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:25,233 INFO L93 Difference]: Finished difference Result 1994 states and 4267 transitions. [2021-08-06 19:41:25,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:41:25,234 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:41:25,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:25,236 INFO L225 Difference]: With dead ends: 1994 [2021-08-06 19:41:25,236 INFO L226 Difference]: Without dead ends: 1983 [2021-08-06 19:41:25,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 395.5ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:41:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-08-06 19:41:25,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1939. [2021-08-06 19:41:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.158410732714138) internal successors, (4183), 1938 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 4183 transitions. [2021-08-06 19:41:25,256 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 4183 transitions. Word has length 22 [2021-08-06 19:41:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:25,256 INFO L470 AbstractCegarLoop]: Abstraction has 1939 states and 4183 transitions. [2021-08-06 19:41:25,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 4183 transitions. [2021-08-06 19:41:25,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:41:25,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:25,257 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:25,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2021-08-06 19:41:25,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:25,458 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:25,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:25,458 INFO L82 PathProgramCache]: Analyzing trace with hash 252546168, now seen corresponding path program 227 times [2021-08-06 19:41:25,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:25,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498793077] [2021-08-06 19:41:25,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:25,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:41:25,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:25,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498793077] [2021-08-06 19:41:25,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498793077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:25,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290073175] [2021-08-06 19:41:25,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:41:25,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:25,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:25,606 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:25,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2021-08-06 19:41:27,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:41:27,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:27,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:41:27,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:28,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:41:28,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:41:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:34,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290073175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:34,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:34,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-06 19:41:34,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547303626] [2021-08-06 19:41:34,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:41:34,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:34,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:41:34,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:41:34,311 INFO L87 Difference]: Start difference. First operand 1939 states and 4183 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:34,597 INFO L93 Difference]: Finished difference Result 1967 states and 4219 transitions. [2021-08-06 19:41:34,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:41:34,597 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:41:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:34,599 INFO L225 Difference]: With dead ends: 1967 [2021-08-06 19:41:34,600 INFO L226 Difference]: Without dead ends: 1955 [2021-08-06 19:41:34,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 395.8ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:41:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2021-08-06 19:41:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1939. [2021-08-06 19:41:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 2.1573787409700724) internal successors, (4181), 1938 states have internal predecessors, (4181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 4181 transitions. [2021-08-06 19:41:34,620 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 4181 transitions. Word has length 22 [2021-08-06 19:41:34,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:34,620 INFO L470 AbstractCegarLoop]: Abstraction has 1939 states and 4181 transitions. [2021-08-06 19:41:34,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:34,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 4181 transitions. [2021-08-06 19:41:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:41:34,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:34,622 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:34,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2021-08-06 19:41:34,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:34,822 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:34,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:34,822 INFO L82 PathProgramCache]: Analyzing trace with hash 23835636, now seen corresponding path program 228 times [2021-08-06 19:41:34,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:34,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354622104] [2021-08-06 19:41:34,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:34,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:34,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:34,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354622104] [2021-08-06 19:41:34,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354622104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:34,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159283671] [2021-08-06 19:41:34,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:41:34,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:34,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:34,998 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:34,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2021-08-06 19:41:37,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:41:37,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:37,297 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:41:37,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:37,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:41:37,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:41:41,982 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:41,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159283671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:41,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:41,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:41:41,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621190330] [2021-08-06 19:41:41,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:41:41,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:41,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:41:41,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:41:41,983 INFO L87 Difference]: Start difference. First operand 1939 states and 4181 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:42,369 INFO L93 Difference]: Finished difference Result 2035 states and 4376 transitions. [2021-08-06 19:41:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:41:42,369 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:41:42,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:42,372 INFO L225 Difference]: With dead ends: 2035 [2021-08-06 19:41:42,372 INFO L226 Difference]: Without dead ends: 2023 [2021-08-06 19:41:42,372 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 382.5ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:41:42,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-08-06 19:41:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1978. [2021-08-06 19:41:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 2.168942842690946) internal successors, (4288), 1977 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 4288 transitions. [2021-08-06 19:41:42,393 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 4288 transitions. Word has length 22 [2021-08-06 19:41:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:42,393 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 4288 transitions. [2021-08-06 19:41:42,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 4288 transitions. [2021-08-06 19:41:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:41:42,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:42,395 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:42,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2021-08-06 19:41:42,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:42,595 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:42,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:42,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1544157244, now seen corresponding path program 229 times [2021-08-06 19:41:42,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:42,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410942050] [2021-08-06 19:41:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:42,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:41:42,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:42,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410942050] [2021-08-06 19:41:42,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410942050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:42,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992349709] [2021-08-06 19:41:42,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:41:42,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:42,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:42,743 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:42,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2021-08-06 19:41:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:45,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:41:45,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:45,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:41:45,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:41:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:50,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992349709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:50,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:50,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-06 19:41:50,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557050865] [2021-08-06 19:41:50,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:41:50,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:50,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:41:50,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:41:50,444 INFO L87 Difference]: Start difference. First operand 1978 states and 4288 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:50,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:50,749 INFO L93 Difference]: Finished difference Result 2005 states and 4323 transitions. [2021-08-06 19:41:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:41:50,750 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:41:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:50,752 INFO L225 Difference]: With dead ends: 2005 [2021-08-06 19:41:50,752 INFO L226 Difference]: Without dead ends: 1993 [2021-08-06 19:41:50,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 391.9ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:41:50,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-08-06 19:41:50,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1978. [2021-08-06 19:41:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 2.1684370257966616) internal successors, (4287), 1977 states have internal predecessors, (4287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:50,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 4287 transitions. [2021-08-06 19:41:50,772 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 4287 transitions. Word has length 22 [2021-08-06 19:41:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:50,772 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 4287 transitions. [2021-08-06 19:41:50,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 4287 transitions. [2021-08-06 19:41:50,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:41:50,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:50,774 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:50,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2021-08-06 19:41:50,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-08-06 19:41:50,974 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:50,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:50,974 INFO L82 PathProgramCache]: Analyzing trace with hash 921661666, now seen corresponding path program 230 times [2021-08-06 19:41:50,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:50,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706217086] [2021-08-06 19:41:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:50,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:51,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:51,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706217086] [2021-08-06 19:41:51,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706217086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:51,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192927775] [2021-08-06 19:41:51,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:41:51,152 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:51,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:51,153 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:51,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2021-08-06 19:41:53,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:41:53,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:41:53,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:41:53,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:41:54,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:41:54,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:41:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:59,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192927775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:59,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:41:59,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:41:59,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092775355] [2021-08-06 19:41:59,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:41:59,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:41:59,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:41:59,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:41:59,095 INFO L87 Difference]: Start difference. First operand 1978 states and 4287 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:59,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:41:59,488 INFO L93 Difference]: Finished difference Result 2066 states and 4469 transitions. [2021-08-06 19:41:59,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:41:59,488 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:41:59,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:41:59,490 INFO L225 Difference]: With dead ends: 2066 [2021-08-06 19:41:59,490 INFO L226 Difference]: Without dead ends: 2055 [2021-08-06 19:41:59,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 400.7ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:41:59,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-08-06 19:41:59,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 2018. [2021-08-06 19:41:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.176995537927615) internal successors, (4391), 2017 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 4391 transitions. [2021-08-06 19:41:59,517 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 4391 transitions. Word has length 22 [2021-08-06 19:41:59,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:41:59,517 INFO L470 AbstractCegarLoop]: Abstraction has 2018 states and 4391 transitions. [2021-08-06 19:41:59,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:41:59,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 4391 transitions. [2021-08-06 19:41:59,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:41:59,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:41:59,519 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:41:59,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2021-08-06 19:41:59,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-08-06 19:41:59,720 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:41:59,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:41:59,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1310502476, now seen corresponding path program 231 times [2021-08-06 19:41:59,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:41:59,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770049093] [2021-08-06 19:41:59,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:41:59,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:41:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:41:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:41:59,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:41:59,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770049093] [2021-08-06 19:41:59,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770049093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:41:59,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770289846] [2021-08-06 19:41:59,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:41:59,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:41:59,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:41:59,894 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:41:59,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2021-08-06 19:42:02,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:42:02,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:02,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:42:02,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:02,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:42:02,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:42:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:08,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770289846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:08,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:08,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:42:08,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890809797] [2021-08-06 19:42:08,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:42:08,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:08,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:42:08,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:42:08,266 INFO L87 Difference]: Start difference. First operand 2018 states and 4391 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:08,711 INFO L93 Difference]: Finished difference Result 2126 states and 4618 transitions. [2021-08-06 19:42:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:42:08,712 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:42:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:08,714 INFO L225 Difference]: With dead ends: 2126 [2021-08-06 19:42:08,714 INFO L226 Difference]: Without dead ends: 2114 [2021-08-06 19:42:08,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 381.6ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:42:08,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-08-06 19:42:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2076. [2021-08-06 19:42:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.185542168674699) internal successors, (4535), 2075 states have internal predecessors, (4535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 4535 transitions. [2021-08-06 19:42:08,737 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 4535 transitions. Word has length 22 [2021-08-06 19:42:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:08,737 INFO L470 AbstractCegarLoop]: Abstraction has 2076 states and 4535 transitions. [2021-08-06 19:42:08,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 4535 transitions. [2021-08-06 19:42:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:42:08,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:08,739 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:08,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:08,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:08,940 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:08,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:08,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1462514108, now seen corresponding path program 232 times [2021-08-06 19:42:08,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:08,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034725366] [2021-08-06 19:42:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:08,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:42:09,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:09,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034725366] [2021-08-06 19:42:09,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034725366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:09,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953996333] [2021-08-06 19:42:09,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:42:09,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:09,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:09,088 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:09,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2021-08-06 19:42:11,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:42:11,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:11,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:42:11,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:12,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:42:12,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:42:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:16,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953996333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:16,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:16,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-06 19:42:16,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581965742] [2021-08-06 19:42:16,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:42:16,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:16,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:42:16,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:42:16,422 INFO L87 Difference]: Start difference. First operand 2076 states and 4535 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:16,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:16,795 INFO L93 Difference]: Finished difference Result 2099 states and 4566 transitions. [2021-08-06 19:42:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:42:16,795 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:42:16,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:16,798 INFO L225 Difference]: With dead ends: 2099 [2021-08-06 19:42:16,798 INFO L226 Difference]: Without dead ends: 2087 [2021-08-06 19:42:16,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:42:16,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-08-06 19:42:16,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 2076. [2021-08-06 19:42:16,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.184578313253012) internal successors, (4533), 2075 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 4533 transitions. [2021-08-06 19:42:16,821 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 4533 transitions. Word has length 22 [2021-08-06 19:42:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:16,821 INFO L470 AbstractCegarLoop]: Abstraction has 2076 states and 4533 transitions. [2021-08-06 19:42:16,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:16,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 4533 transitions. [2021-08-06 19:42:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:42:16,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:16,823 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:16,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2021-08-06 19:42:17,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-08-06 19:42:17,023 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:17,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:17,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1788114142, now seen corresponding path program 233 times [2021-08-06 19:42:17,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:17,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710986476] [2021-08-06 19:42:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:17,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:17,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:17,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710986476] [2021-08-06 19:42:17,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710986476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:17,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263851354] [2021-08-06 19:42:17,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:42:17,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:17,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:17,212 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:17,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2021-08-06 19:42:19,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:42:19,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:19,586 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:42:19,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:20,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:42:20,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:42:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:23,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263851354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:23,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:23,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:42:23,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527872007] [2021-08-06 19:42:23,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:42:23,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:23,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:42:23,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:42:23,806 INFO L87 Difference]: Start difference. First operand 2076 states and 4533 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:24,196 INFO L93 Difference]: Finished difference Result 2180 states and 4754 transitions. [2021-08-06 19:42:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:42:24,196 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:42:24,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:24,199 INFO L225 Difference]: With dead ends: 2180 [2021-08-06 19:42:24,199 INFO L226 Difference]: Without dead ends: 2169 [2021-08-06 19:42:24,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:42:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-08-06 19:42:24,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2139. [2021-08-06 19:42:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 2.1908325537885873) internal successors, (4684), 2138 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 4684 transitions. [2021-08-06 19:42:24,224 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 4684 transitions. Word has length 22 [2021-08-06 19:42:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:24,224 INFO L470 AbstractCegarLoop]: Abstraction has 2139 states and 4684 transitions. [2021-08-06 19:42:24,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:24,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 4684 transitions. [2021-08-06 19:42:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:42:24,226 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:24,226 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:24,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2021-08-06 19:42:24,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-08-06 19:42:24,427 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:24,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:24,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2001211128, now seen corresponding path program 234 times [2021-08-06 19:42:24,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:24,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537459427] [2021-08-06 19:42:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:24,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:42:24,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:24,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537459427] [2021-08-06 19:42:24,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537459427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:24,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624532553] [2021-08-06 19:42:24,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:42:24,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:24,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:24,604 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:24,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2021-08-06 19:42:27,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:42:27,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:27,068 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:42:27,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:27,728 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:42:27,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:42:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:31,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624532553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:31,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:31,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-06 19:42:31,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880521956] [2021-08-06 19:42:31,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:42:31,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:31,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:42:31,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:42:31,775 INFO L87 Difference]: Start difference. First operand 2139 states and 4684 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:32,250 INFO L93 Difference]: Finished difference Result 2165 states and 4716 transitions. [2021-08-06 19:42:32,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:42:32,251 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:42:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:32,253 INFO L225 Difference]: With dead ends: 2165 [2021-08-06 19:42:32,253 INFO L226 Difference]: Without dead ends: 2149 [2021-08-06 19:42:32,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 506.4ms TimeCoverageRelationStatistics Valid=125, Invalid=1281, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:42:32,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-08-06 19:42:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 2139. [2021-08-06 19:42:32,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 2.1894293732460244) internal successors, (4681), 2138 states have internal predecessors, (4681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 4681 transitions. [2021-08-06 19:42:32,276 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 4681 transitions. Word has length 22 [2021-08-06 19:42:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:32,276 INFO L470 AbstractCegarLoop]: Abstraction has 2139 states and 4681 transitions. [2021-08-06 19:42:32,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 4681 transitions. [2021-08-06 19:42:32,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:42:32,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:32,278 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:32,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2021-08-06 19:42:32,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-08-06 19:42:32,483 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:32,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:32,483 INFO L82 PathProgramCache]: Analyzing trace with hash 585793396, now seen corresponding path program 235 times [2021-08-06 19:42:32,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:32,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449417186] [2021-08-06 19:42:32,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:32,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:32,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:32,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:32,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449417186] [2021-08-06 19:42:32,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449417186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:32,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457799036] [2021-08-06 19:42:32,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:42:32,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:32,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:32,659 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:32,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2021-08-06 19:42:35,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:35,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:42:35,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:35,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:42:35,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:42:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:41,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457799036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:41,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:41,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:42:41,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558223558] [2021-08-06 19:42:41,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:42:41,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:41,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:42:41,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:42:41,637 INFO L87 Difference]: Start difference. First operand 2139 states and 4681 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:42,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:42,008 INFO L93 Difference]: Finished difference Result 2324 states and 5067 transitions. [2021-08-06 19:42:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:42:42,008 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:42:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:42,011 INFO L225 Difference]: With dead ends: 2324 [2021-08-06 19:42:42,011 INFO L226 Difference]: Without dead ends: 2312 [2021-08-06 19:42:42,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:42:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-08-06 19:42:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 2282. [2021-08-06 19:42:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 2.1915826391933364) internal successors, (4999), 2281 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 4999 transitions. [2021-08-06 19:42:42,038 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 4999 transitions. Word has length 22 [2021-08-06 19:42:42,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:42,038 INFO L470 AbstractCegarLoop]: Abstraction has 2282 states and 4999 transitions. [2021-08-06 19:42:42,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 4999 transitions. [2021-08-06 19:42:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:42:42,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:42,041 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:42,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:42,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-08-06 19:42:42,241 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash 719032452, now seen corresponding path program 236 times [2021-08-06 19:42:42,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:42,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137378072] [2021-08-06 19:42:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:42,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:42,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:42,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137378072] [2021-08-06 19:42:42,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137378072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:42,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003970096] [2021-08-06 19:42:42,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:42:42,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:42,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:42,479 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:42,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2021-08-06 19:42:44,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:42:44,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:44,998 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:42:44,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:45,690 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:42:45,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:42:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:49,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003970096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:49,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:49,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-06 19:42:49,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956066097] [2021-08-06 19:42:49,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:42:49,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:49,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:42:49,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:42:49,014 INFO L87 Difference]: Start difference. First operand 2282 states and 4999 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:49,536 INFO L93 Difference]: Finished difference Result 2315 states and 5041 transitions. [2021-08-06 19:42:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:42:49,536 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:42:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:49,539 INFO L225 Difference]: With dead ends: 2315 [2021-08-06 19:42:49,539 INFO L226 Difference]: Without dead ends: 2299 [2021-08-06 19:42:49,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 564.3ms TimeCoverageRelationStatistics Valid=127, Invalid=1355, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:42:49,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2021-08-06 19:42:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2282. [2021-08-06 19:42:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 2.1898290223586145) internal successors, (4995), 2281 states have internal predecessors, (4995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 4995 transitions. [2021-08-06 19:42:49,564 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 4995 transitions. Word has length 22 [2021-08-06 19:42:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:49,564 INFO L470 AbstractCegarLoop]: Abstraction has 2282 states and 4995 transitions. [2021-08-06 19:42:49,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 4995 transitions. [2021-08-06 19:42:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:42:49,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:49,566 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:49,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2021-08-06 19:42:49,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:49,767 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:49,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:49,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1195770274, now seen corresponding path program 237 times [2021-08-06 19:42:49,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:49,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420064110] [2021-08-06 19:42:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:49,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:49,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:49,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420064110] [2021-08-06 19:42:49,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420064110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:49,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291361219] [2021-08-06 19:42:49,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:42:49,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:49,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:49,938 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:49,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2021-08-06 19:42:52,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 19:42:52,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:42:52,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:42:52,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:42:53,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:42:53,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:42:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:57,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291361219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:57,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:42:57,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-06 19:42:57,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587164590] [2021-08-06 19:42:57,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:42:57,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:42:57,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:42:57,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:42:57,449 INFO L87 Difference]: Start difference. First operand 2282 states and 4995 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:57,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:42:57,975 INFO L93 Difference]: Finished difference Result 2313 states and 5036 transitions. [2021-08-06 19:42:57,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:42:57,976 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:42:57,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:42:57,979 INFO L225 Difference]: With dead ends: 2313 [2021-08-06 19:42:57,979 INFO L226 Difference]: Without dead ends: 2299 [2021-08-06 19:42:57,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:42:57,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2021-08-06 19:42:57,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2282. [2021-08-06 19:42:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 2.188952213941254) internal successors, (4993), 2281 states have internal predecessors, (4993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 4993 transitions. [2021-08-06 19:42:58,003 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 4993 transitions. Word has length 22 [2021-08-06 19:42:58,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:42:58,003 INFO L470 AbstractCegarLoop]: Abstraction has 2282 states and 4993 transitions. [2021-08-06 19:42:58,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:42:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 4993 transitions. [2021-08-06 19:42:58,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:42:58,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:42:58,005 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:42:58,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2021-08-06 19:42:58,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:58,205 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:42:58,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:42:58,206 INFO L82 PathProgramCache]: Analyzing trace with hash -312871740, now seen corresponding path program 238 times [2021-08-06 19:42:58,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:42:58,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516716478] [2021-08-06 19:42:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:42:58,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:42:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:42:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:42:58,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:42:58,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516716478] [2021-08-06 19:42:58,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516716478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:42:58,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953837360] [2021-08-06 19:42:58,365 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:42:58,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:42:58,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:42:58,366 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:42:58,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2021-08-06 19:43:00,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:43:00,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:00,931 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:43:00,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:01,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:43:01,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:43:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:06,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953837360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:06,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:06,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:43:06,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109989710] [2021-08-06 19:43:06,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:43:06,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:06,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:43:06,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:43:06,815 INFO L87 Difference]: Start difference. First operand 2282 states and 4993 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:07,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:07,242 INFO L93 Difference]: Finished difference Result 2310 states and 5032 transitions. [2021-08-06 19:43:07,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:43:07,242 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:43:07,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:07,245 INFO L225 Difference]: With dead ends: 2310 [2021-08-06 19:43:07,245 INFO L226 Difference]: Without dead ends: 2298 [2021-08-06 19:43:07,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 418.2ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:43:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-08-06 19:43:07,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2282. [2021-08-06 19:43:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 2281 states have (on average 2.1885138097325734) internal successors, (4992), 2281 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:07,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 4992 transitions. [2021-08-06 19:43:07,269 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 4992 transitions. Word has length 22 [2021-08-06 19:43:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:07,269 INFO L470 AbstractCegarLoop]: Abstraction has 2282 states and 4992 transitions. [2021-08-06 19:43:07,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 4992 transitions. [2021-08-06 19:43:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:43:07,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:07,271 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:07,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2021-08-06 19:43:07,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable241 [2021-08-06 19:43:07,472 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:07,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:07,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1162483042, now seen corresponding path program 239 times [2021-08-06 19:43:07,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:07,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534117837] [2021-08-06 19:43:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:07,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:07,631 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:07,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:07,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534117837] [2021-08-06 19:43:07,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534117837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:07,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427229515] [2021-08-06 19:43:07,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:43:07,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:07,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:07,632 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:07,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2021-08-06 19:43:10,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:43:10,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:10,250 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:43:10,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:10,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:43:10,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:43:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:14,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427229515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:14,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:14,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:43:14,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17467458] [2021-08-06 19:43:14,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:43:14,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:14,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:43:14,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:43:14,964 INFO L87 Difference]: Start difference. First operand 2282 states and 4992 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:15,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:15,379 INFO L93 Difference]: Finished difference Result 2805 states and 6046 transitions. [2021-08-06 19:43:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:43:15,379 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:43:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:15,383 INFO L225 Difference]: With dead ends: 2805 [2021-08-06 19:43:15,383 INFO L226 Difference]: Without dead ends: 2794 [2021-08-06 19:43:15,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 388.6ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:43:15,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-08-06 19:43:15,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 2768. [2021-08-06 19:43:15,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2768 states, 2767 states have (on average 2.164438019515721) internal successors, (5989), 2767 states have internal predecessors, (5989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 5989 transitions. [2021-08-06 19:43:15,414 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 5989 transitions. Word has length 22 [2021-08-06 19:43:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:15,414 INFO L470 AbstractCegarLoop]: Abstraction has 2768 states and 5989 transitions. [2021-08-06 19:43:15,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 5989 transitions. [2021-08-06 19:43:15,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:43:15,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:15,417 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:15,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2021-08-06 19:43:15,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:15,618 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:15,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:15,618 INFO L82 PathProgramCache]: Analyzing trace with hash -373800840, now seen corresponding path program 240 times [2021-08-06 19:43:15,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:15,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475193970] [2021-08-06 19:43:15,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:15,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:15,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:15,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475193970] [2021-08-06 19:43:15,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475193970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:15,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034749145] [2021-08-06 19:43:15,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:43:15,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:15,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:15,821 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:15,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2021-08-06 19:43:18,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:43:18,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:18,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:43:18,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:19,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:43:19,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:43:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:22,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034749145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:22,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:22,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 19:43:22,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540799722] [2021-08-06 19:43:22,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:43:22,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:22,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:43:22,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:43:22,452 INFO L87 Difference]: Start difference. First operand 2768 states and 5989 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:23,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:23,044 INFO L93 Difference]: Finished difference Result 2821 states and 6061 transitions. [2021-08-06 19:43:23,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 19:43:23,044 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:43:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:23,048 INFO L225 Difference]: With dead ends: 2821 [2021-08-06 19:43:23,048 INFO L226 Difference]: Without dead ends: 2801 [2021-08-06 19:43:23,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 589.0ms TimeCoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:43:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-08-06 19:43:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2768. [2021-08-06 19:43:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2768 states, 2767 states have (on average 2.1619082038308637) internal successors, (5982), 2767 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 5982 transitions. [2021-08-06 19:43:23,111 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 5982 transitions. Word has length 22 [2021-08-06 19:43:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:23,111 INFO L470 AbstractCegarLoop]: Abstraction has 2768 states and 5982 transitions. [2021-08-06 19:43:23,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 5982 transitions. [2021-08-06 19:43:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:43:23,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:23,114 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:23,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2021-08-06 19:43:23,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:23,315 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:23,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:23,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2047522228, now seen corresponding path program 241 times [2021-08-06 19:43:23,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:23,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186388960] [2021-08-06 19:43:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:23,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:23,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:23,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186388960] [2021-08-06 19:43:23,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186388960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:23,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372513144] [2021-08-06 19:43:23,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:43:23,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:23,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:23,511 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:23,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2021-08-06 19:43:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:26,156 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:43:26,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:26,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:43:26,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:43:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:30,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372513144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:30,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:30,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-06 19:43:30,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753962137] [2021-08-06 19:43:30,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 19:43:30,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:30,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 19:43:30,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:43:30,989 INFO L87 Difference]: Start difference. First operand 2768 states and 5982 transitions. Second operand has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:31,584 INFO L93 Difference]: Finished difference Result 2812 states and 6042 transitions. [2021-08-06 19:43:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:43:31,584 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:43:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:31,588 INFO L225 Difference]: With dead ends: 2812 [2021-08-06 19:43:31,588 INFO L226 Difference]: Without dead ends: 2795 [2021-08-06 19:43:31,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 500.4ms TimeCoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:43:31,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-08-06 19:43:31,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2768. [2021-08-06 19:43:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2768 states, 2767 states have (on average 2.160462594868088) internal successors, (5978), 2767 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 5978 transitions. [2021-08-06 19:43:31,620 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 5978 transitions. Word has length 22 [2021-08-06 19:43:31,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:31,621 INFO L470 AbstractCegarLoop]: Abstraction has 2768 states and 5978 transitions. [2021-08-06 19:43:31,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:31,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 5978 transitions. [2021-08-06 19:43:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:43:31,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:31,623 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:31,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2021-08-06 19:43:31,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:31,824 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:31,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1892243208, now seen corresponding path program 242 times [2021-08-06 19:43:31,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:31,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218071387] [2021-08-06 19:43:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:31,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:31,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:31,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218071387] [2021-08-06 19:43:31,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218071387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:31,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848752017] [2021-08-06 19:43:31,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:43:31,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:31,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:31,996 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:31,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2021-08-06 19:43:34,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:43:34,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:34,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:43:34,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:35,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:43:35,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:43:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:41,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848752017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:41,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:41,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-08-06 19:43:41,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647657251] [2021-08-06 19:43:41,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-06 19:43:41,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:41,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-06 19:43:41,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:43:41,127 INFO L87 Difference]: Start difference. First operand 2768 states and 5978 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:41,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:41,698 INFO L93 Difference]: Finished difference Result 2800 states and 6022 transitions. [2021-08-06 19:43:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 19:43:41,698 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:43:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:41,701 INFO L225 Difference]: With dead ends: 2800 [2021-08-06 19:43:41,701 INFO L226 Difference]: Without dead ends: 2788 [2021-08-06 19:43:41,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=105, Invalid=1017, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 19:43:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2021-08-06 19:43:41,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 2768. [2021-08-06 19:43:41,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2768 states, 2767 states have (on average 2.160101192627394) internal successors, (5977), 2767 states have internal predecessors, (5977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2768 states to 2768 states and 5977 transitions. [2021-08-06 19:43:41,730 INFO L78 Accepts]: Start accepts. Automaton has 2768 states and 5977 transitions. Word has length 22 [2021-08-06 19:43:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:41,730 INFO L470 AbstractCegarLoop]: Abstraction has 2768 states and 5977 transitions. [2021-08-06 19:43:41,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2768 states and 5977 transitions. [2021-08-06 19:43:41,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 19:43:41,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:41,733 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:41,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2021-08-06 19:43:41,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-08-06 19:43:41,933 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:41,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1859992884, now seen corresponding path program 243 times [2021-08-06 19:43:41,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:41,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841927587] [2021-08-06 19:43:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:41,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:42,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:42,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841927587] [2021-08-06 19:43:42,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841927587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:42,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185043967] [2021-08-06 19:43:42,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:43:42,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:42,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:42,094 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:42,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2021-08-06 19:43:44,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:43:44,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:44,776 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 19:43:44,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:45,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:43:45,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 337 [2021-08-06 19:43:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:50,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185043967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:50,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:43:50,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:43:50,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984645277] [2021-08-06 19:43:50,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:43:50,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:43:50,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:43:50,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:43:50,766 INFO L87 Difference]: Start difference. First operand 2768 states and 5977 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:51,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:43:51,251 INFO L93 Difference]: Finished difference Result 3211 states and 6872 transitions. [2021-08-06 19:43:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:43:51,251 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 19:43:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:43:51,255 INFO L225 Difference]: With dead ends: 3211 [2021-08-06 19:43:51,255 INFO L226 Difference]: Without dead ends: 3201 [2021-08-06 19:43:51,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:43:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-08-06 19:43:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 3185. [2021-08-06 19:43:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 3184 states have (on average 2.147298994974874) internal successors, (6837), 3184 states have internal predecessors, (6837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:51,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 6837 transitions. [2021-08-06 19:43:51,295 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 6837 transitions. Word has length 22 [2021-08-06 19:43:51,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:43:51,295 INFO L470 AbstractCegarLoop]: Abstraction has 3185 states and 6837 transitions. [2021-08-06 19:43:51,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:43:51,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 6837 transitions. [2021-08-06 19:43:51,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:43:51,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:43:51,299 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:43:51,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2021-08-06 19:43:51,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-08-06 19:43:51,499 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:43:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:43:51,500 INFO L82 PathProgramCache]: Analyzing trace with hash 209261569, now seen corresponding path program 244 times [2021-08-06 19:43:51,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:43:51,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739636672] [2021-08-06 19:43:51,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:43:51,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:43:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:43:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:43:51,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:43:51,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739636672] [2021-08-06 19:43:51,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739636672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:43:51,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405141045] [2021-08-06 19:43:51,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:43:51,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:43:51,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:43:51,712 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:43:51,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2021-08-06 19:43:54,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:43:54,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:43:54,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 19:43:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:43:55,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:43:55,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 77 treesize of output 337 [2021-08-06 19:44:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:02,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405141045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:02,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:02,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 19:44:02,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848636016] [2021-08-06 19:44:02,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 19:44:02,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:02,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 19:44:02,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:44:02,276 INFO L87 Difference]: Start difference. First operand 3185 states and 6837 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:02,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:02,847 INFO L93 Difference]: Finished difference Result 3239 states and 6928 transitions. [2021-08-06 19:44:02,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 19:44:02,848 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:44:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:02,851 INFO L225 Difference]: With dead ends: 3239 [2021-08-06 19:44:02,851 INFO L226 Difference]: Without dead ends: 3231 [2021-08-06 19:44:02,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 664.2ms TimeCoverageRelationStatistics Valid=143, Invalid=1749, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 19:44:02,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3231 states. [2021-08-06 19:44:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3231 to 3188. [2021-08-06 19:44:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3187 states have (on average 2.1471603388766867) internal successors, (6843), 3187 states have internal predecessors, (6843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:02,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 6843 transitions. [2021-08-06 19:44:02,888 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 6843 transitions. Word has length 23 [2021-08-06 19:44:02,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:02,888 INFO L470 AbstractCegarLoop]: Abstraction has 3188 states and 6843 transitions. [2021-08-06 19:44:02,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:02,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 6843 transitions. [2021-08-06 19:44:02,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:44:02,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:02,891 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:02,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2021-08-06 19:44:03,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:03,092 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:03,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:03,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1140841617, now seen corresponding path program 245 times [2021-08-06 19:44:03,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:03,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128171708] [2021-08-06 19:44:03,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:03,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:03,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:03,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128171708] [2021-08-06 19:44:03,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128171708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:03,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159754885] [2021-08-06 19:44:03,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:44:03,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:03,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:03,256 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:03,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2021-08-06 19:44:05,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:44:05,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:05,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 19:44:05,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:06,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:44:06,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 77 treesize of output 337 [2021-08-06 19:44:10,960 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:10,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159754885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:10,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:10,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:44:10,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382680149] [2021-08-06 19:44:10,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:44:10,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:10,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:44:10,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:44:10,961 INFO L87 Difference]: Start difference. First operand 3188 states and 6843 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:11,457 INFO L93 Difference]: Finished difference Result 3245 states and 6929 transitions. [2021-08-06 19:44:11,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:44:11,458 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:44:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:11,462 INFO L225 Difference]: With dead ends: 3245 [2021-08-06 19:44:11,462 INFO L226 Difference]: Without dead ends: 3240 [2021-08-06 19:44:11,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 422.9ms TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:44:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3240 states. [2021-08-06 19:44:11,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3240 to 3190. [2021-08-06 19:44:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3190 states, 3189 states have (on average 2.1473816243336468) internal successors, (6848), 3189 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3190 states to 3190 states and 6848 transitions. [2021-08-06 19:44:11,499 INFO L78 Accepts]: Start accepts. Automaton has 3190 states and 6848 transitions. Word has length 23 [2021-08-06 19:44:11,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:11,499 INFO L470 AbstractCegarLoop]: Abstraction has 3190 states and 6848 transitions. [2021-08-06 19:44:11,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3190 states and 6848 transitions. [2021-08-06 19:44:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:44:11,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:11,502 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:11,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2021-08-06 19:44:11,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:11,702 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:11,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:11,703 INFO L82 PathProgramCache]: Analyzing trace with hash 601968718, now seen corresponding path program 246 times [2021-08-06 19:44:11,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:11,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566398013] [2021-08-06 19:44:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:11,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:11,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:11,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566398013] [2021-08-06 19:44:11,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566398013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:11,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269069510] [2021-08-06 19:44:11,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:44:11,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:11,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:11,799 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:11,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2021-08-06 19:44:14,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 19:44:14,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:14,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:44:14,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:14,611 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:44:14,612 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:44:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:14,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269069510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:14,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:14,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:44:14,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654228741] [2021-08-06 19:44:14,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:44:14,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:14,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:44:14,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:44:14,632 INFO L87 Difference]: Start difference. First operand 3190 states and 6848 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:14,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:14,713 INFO L93 Difference]: Finished difference Result 3422 states and 7210 transitions. [2021-08-06 19:44:14,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:44:14,714 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:44:14,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:14,718 INFO L225 Difference]: With dead ends: 3422 [2021-08-06 19:44:14,718 INFO L226 Difference]: Without dead ends: 3422 [2021-08-06 19:44:14,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:44:14,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-08-06 19:44:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 3200. [2021-08-06 19:44:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3200 states, 3199 states have (on average 2.1497342919662397) internal successors, (6877), 3199 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:14,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 6877 transitions. [2021-08-06 19:44:14,760 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 6877 transitions. Word has length 23 [2021-08-06 19:44:14,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:14,760 INFO L470 AbstractCegarLoop]: Abstraction has 3200 states and 6877 transitions. [2021-08-06 19:44:14,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:14,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 6877 transitions. [2021-08-06 19:44:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:44:14,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:14,763 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:14,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2021-08-06 19:44:14,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-08-06 19:44:14,973 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:14,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1111879487, now seen corresponding path program 247 times [2021-08-06 19:44:14,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:14,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783250190] [2021-08-06 19:44:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:14,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:15,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:15,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783250190] [2021-08-06 19:44:15,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783250190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:15,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696352362] [2021-08-06 19:44:15,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:44:15,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:15,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:15,134 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:15,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2021-08-06 19:44:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:17,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 19:44:17,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:18,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:44:18,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 77 treesize of output 337 [2021-08-06 19:44:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:26,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696352362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:26,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:26,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:44:26,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338251885] [2021-08-06 19:44:26,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:44:26,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:26,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:44:26,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:44:26,552 INFO L87 Difference]: Start difference. First operand 3200 states and 6877 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:27,077 INFO L93 Difference]: Finished difference Result 3265 states and 6988 transitions. [2021-08-06 19:44:27,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:44:27,077 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:44:27,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:27,081 INFO L225 Difference]: With dead ends: 3265 [2021-08-06 19:44:27,081 INFO L226 Difference]: Without dead ends: 3261 [2021-08-06 19:44:27,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 408.1ms TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:44:27,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-08-06 19:44:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 3205. [2021-08-06 19:44:27,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3205 states, 3204 states have (on average 2.151061173533084) internal successors, (6892), 3204 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3205 states to 3205 states and 6892 transitions. [2021-08-06 19:44:27,118 INFO L78 Accepts]: Start accepts. Automaton has 3205 states and 6892 transitions. Word has length 23 [2021-08-06 19:44:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:27,119 INFO L470 AbstractCegarLoop]: Abstraction has 3205 states and 6892 transitions. [2021-08-06 19:44:27,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:27,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3205 states and 6892 transitions. [2021-08-06 19:44:27,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:44:27,122 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:27,122 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:27,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2021-08-06 19:44:27,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:27,322 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:27,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:27,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1375633346, now seen corresponding path program 248 times [2021-08-06 19:44:27,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:27,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591725169] [2021-08-06 19:44:27,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:27,323 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:27,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:27,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591725169] [2021-08-06 19:44:27,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591725169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:27,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392098585] [2021-08-06 19:44:27,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:44:27,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:27,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:27,414 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:27,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2021-08-06 19:44:30,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:44:30,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:30,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:44:30,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:30,280 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:44:30,281 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:44:30,300 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:30,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392098585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:30,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:30,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:44:30,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624551846] [2021-08-06 19:44:30,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:44:30,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:30,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:44:30,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:44:30,301 INFO L87 Difference]: Start difference. First operand 3205 states and 6892 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:30,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:30,395 INFO L93 Difference]: Finished difference Result 3591 states and 7563 transitions. [2021-08-06 19:44:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:44:30,395 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:44:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:30,399 INFO L225 Difference]: With dead ends: 3591 [2021-08-06 19:44:30,399 INFO L226 Difference]: Without dead ends: 3591 [2021-08-06 19:44:30,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:44:30,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3591 states. [2021-08-06 19:44:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3591 to 3196. [2021-08-06 19:44:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3196 states, 3195 states have (on average 2.1480438184663537) internal successors, (6863), 3195 states have internal predecessors, (6863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3196 states to 3196 states and 6863 transitions. [2021-08-06 19:44:30,441 INFO L78 Accepts]: Start accepts. Automaton has 3196 states and 6863 transitions. Word has length 23 [2021-08-06 19:44:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:30,441 INFO L470 AbstractCegarLoop]: Abstraction has 3196 states and 6863 transitions. [2021-08-06 19:44:30,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:30,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3196 states and 6863 transitions. [2021-08-06 19:44:30,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:44:30,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:30,444 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:30,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2021-08-06 19:44:30,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:30,645 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:30,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:30,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1615094929, now seen corresponding path program 249 times [2021-08-06 19:44:30,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:30,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850132618] [2021-08-06 19:44:30,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:30,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:44:30,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:30,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850132618] [2021-08-06 19:44:30,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850132618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:30,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429521981] [2021-08-06 19:44:30,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:44:30,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:30,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:30,794 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:30,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2021-08-06 19:44:33,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:44:33,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:33,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:44:33,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:34,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:44:34,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 94 treesize of output 354 [2021-08-06 19:44:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:41,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429521981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:41,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:41,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-06 19:44:41,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544860793] [2021-08-06 19:44:41,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:44:41,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:44:41,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:44:41,249 INFO L87 Difference]: Start difference. First operand 3196 states and 6863 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:41,643 INFO L93 Difference]: Finished difference Result 3227 states and 6919 transitions. [2021-08-06 19:44:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:44:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:44:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:41,646 INFO L225 Difference]: With dead ends: 3227 [2021-08-06 19:44:41,646 INFO L226 Difference]: Without dead ends: 3219 [2021-08-06 19:44:41,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 443.5ms TimeCoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:44:41,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2021-08-06 19:44:41,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3197. [2021-08-06 19:44:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3196 states have (on average 2.147997496871089) internal successors, (6865), 3196 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:41,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 6865 transitions. [2021-08-06 19:44:41,682 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 6865 transitions. Word has length 23 [2021-08-06 19:44:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:41,683 INFO L470 AbstractCegarLoop]: Abstraction has 3197 states and 6865 transitions. [2021-08-06 19:44:41,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 6865 transitions. [2021-08-06 19:44:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:44:41,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:41,686 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:41,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2021-08-06 19:44:41,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:41,887 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:41,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:41,887 INFO L82 PathProgramCache]: Analyzing trace with hash -214053457, now seen corresponding path program 250 times [2021-08-06 19:44:41,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:41,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409056294] [2021-08-06 19:44:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:41,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:42,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:42,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409056294] [2021-08-06 19:44:42,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409056294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:42,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693514471] [2021-08-06 19:44:42,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:44:42,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:42,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:42,056 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:42,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2021-08-06 19:44:44,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:44:44,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:44,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 19:44:44,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:45,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:44:45,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 77 treesize of output 337 [2021-08-06 19:44:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:51,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693514471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:51,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:51,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:44:51,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095209206] [2021-08-06 19:44:51,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:44:51,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:51,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:44:51,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:44:51,994 INFO L87 Difference]: Start difference. First operand 3197 states and 6865 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:52,469 INFO L93 Difference]: Finished difference Result 3254 states and 6967 transitions. [2021-08-06 19:44:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:44:52,469 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:44:52,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:52,473 INFO L225 Difference]: With dead ends: 3254 [2021-08-06 19:44:52,473 INFO L226 Difference]: Without dead ends: 3249 [2021-08-06 19:44:52,473 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:44:52,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2021-08-06 19:44:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 3201. [2021-08-06 19:44:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 2.14875) internal successors, (6876), 3200 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 6876 transitions. [2021-08-06 19:44:52,511 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 6876 transitions. Word has length 23 [2021-08-06 19:44:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:52,511 INFO L470 AbstractCegarLoop]: Abstraction has 3201 states and 6876 transitions. [2021-08-06 19:44:52,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:52,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 6876 transitions. [2021-08-06 19:44:52,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:44:52,514 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:52,514 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:52,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2021-08-06 19:44:52,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:52,715 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:52,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:52,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1528756878, now seen corresponding path program 251 times [2021-08-06 19:44:52,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:52,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122223363] [2021-08-06 19:44:52,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:52,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:44:52,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:52,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122223363] [2021-08-06 19:44:52,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122223363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:52,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098645643] [2021-08-06 19:44:52,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:44:52,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:52,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:52,799 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:52,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2021-08-06 19:44:55,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:44:55,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:55,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:44:55,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:55,768 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:44:55,769 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:44:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:44:55,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098645643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:55,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:55,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:44:55,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715476692] [2021-08-06 19:44:55,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:44:55,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:44:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:44:55,789 INFO L87 Difference]: Start difference. First operand 3201 states and 6876 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:55,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:55,856 INFO L93 Difference]: Finished difference Result 3325 states and 7044 transitions. [2021-08-06 19:44:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:44:55,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:44:55,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:55,860 INFO L225 Difference]: With dead ends: 3325 [2021-08-06 19:44:55,860 INFO L226 Difference]: Without dead ends: 3325 [2021-08-06 19:44:55,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:44:55,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2021-08-06 19:44:55,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 3221. [2021-08-06 19:44:55,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3221 states, 3220 states have (on average 2.15) internal successors, (6923), 3220 states have internal predecessors, (6923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3221 states to 3221 states and 6923 transitions. [2021-08-06 19:44:55,903 INFO L78 Accepts]: Start accepts. Automaton has 3221 states and 6923 transitions. Word has length 23 [2021-08-06 19:44:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:55,903 INFO L470 AbstractCegarLoop]: Abstraction has 3221 states and 6923 transitions. [2021-08-06 19:44:55,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 3221 states and 6923 transitions. [2021-08-06 19:44:55,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:44:55,907 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:55,907 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:55,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2021-08-06 19:44:56,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-08-06 19:44:56,125 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:56,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:56,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2021507920, now seen corresponding path program 252 times [2021-08-06 19:44:56,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:56,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990269449] [2021-08-06 19:44:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:56,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:56,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:56,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990269449] [2021-08-06 19:44:56,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990269449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:56,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535685548] [2021-08-06 19:44:56,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:44:56,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:56,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:56,227 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:56,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2021-08-06 19:44:59,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:44:59,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:44:59,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:44:59,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:44:59,191 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:44:59,191 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:44:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:59,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535685548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:59,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:44:59,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:44:59,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737011772] [2021-08-06 19:44:59,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:44:59,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:44:59,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:44:59,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:44:59,211 INFO L87 Difference]: Start difference. First operand 3221 states and 6923 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:44:59,300 INFO L93 Difference]: Finished difference Result 3492 states and 7371 transitions. [2021-08-06 19:44:59,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:44:59,302 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:44:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:44:59,306 INFO L225 Difference]: With dead ends: 3492 [2021-08-06 19:44:59,306 INFO L226 Difference]: Without dead ends: 3492 [2021-08-06 19:44:59,306 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:44:59,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2021-08-06 19:44:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3227. [2021-08-06 19:44:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 3226 states have (on average 2.1497210167389955) internal successors, (6935), 3226 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:59,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 6935 transitions. [2021-08-06 19:44:59,346 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 6935 transitions. Word has length 23 [2021-08-06 19:44:59,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:44:59,346 INFO L470 AbstractCegarLoop]: Abstraction has 3227 states and 6935 transitions. [2021-08-06 19:44:59,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:44:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 6935 transitions. [2021-08-06 19:44:59,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:44:59,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:44:59,350 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:44:59,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2021-08-06 19:44:59,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-08-06 19:44:59,552 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:44:59,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:44:59,553 INFO L82 PathProgramCache]: Analyzing trace with hash -410566962, now seen corresponding path program 253 times [2021-08-06 19:44:59,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:44:59,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910880855] [2021-08-06 19:44:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:44:59,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:44:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:44:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:44:59,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:44:59,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910880855] [2021-08-06 19:44:59,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910880855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:44:59,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855654684] [2021-08-06 19:44:59,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:44:59,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:44:59,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:44:59,646 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:44:59,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2021-08-06 19:45:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:02,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:45:02,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:02,713 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:02,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:02,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855654684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:02,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:02,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:45:02,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313070826] [2021-08-06 19:45:02,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:45:02,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:02,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:45:02,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:45:02,734 INFO L87 Difference]: Start difference. First operand 3227 states and 6935 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:02,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:02,845 INFO L93 Difference]: Finished difference Result 4877 states and 10443 transitions. [2021-08-06 19:45:02,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:45:02,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:45:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:02,852 INFO L225 Difference]: With dead ends: 4877 [2021-08-06 19:45:02,853 INFO L226 Difference]: Without dead ends: 4877 [2021-08-06 19:45:02,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:45:02,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4877 states. [2021-08-06 19:45:02,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4877 to 4536. [2021-08-06 19:45:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4536 states, 4535 states have (on average 2.1671444321940463) internal successors, (9828), 4535 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:02,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4536 states to 4536 states and 9828 transitions. [2021-08-06 19:45:02,927 INFO L78 Accepts]: Start accepts. Automaton has 4536 states and 9828 transitions. Word has length 23 [2021-08-06 19:45:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:02,928 INFO L470 AbstractCegarLoop]: Abstraction has 4536 states and 9828 transitions. [2021-08-06 19:45:02,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:02,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4536 states and 9828 transitions. [2021-08-06 19:45:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:45:02,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:02,933 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:02,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2021-08-06 19:45:03,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-08-06 19:45:03,134 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:45:03,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:03,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1751864005, now seen corresponding path program 254 times [2021-08-06 19:45:03,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:03,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192331154] [2021-08-06 19:45:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:03,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:03,300 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:45:03,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:03,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192331154] [2021-08-06 19:45:03,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192331154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:03,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942167490] [2021-08-06 19:45:03,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:45:03,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:03,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:03,301 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:45:03,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2021-08-06 19:45:06,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:45:06,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:45:06,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 19:45:06,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:07,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:45:07,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 77 treesize of output 337 [2021-08-06 19:45:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:13,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942167490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:13,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:13,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-06 19:45:13,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067197217] [2021-08-06 19:45:13,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:45:13,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:13,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:45:13,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:45:13,571 INFO L87 Difference]: Start difference. First operand 4536 states and 9828 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:13,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:13,925 INFO L93 Difference]: Finished difference Result 4565 states and 9878 transitions. [2021-08-06 19:45:13,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:45:13,926 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:45:13,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:13,931 INFO L225 Difference]: With dead ends: 4565 [2021-08-06 19:45:13,931 INFO L226 Difference]: Without dead ends: 4557 [2021-08-06 19:45:13,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 19:45:13,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4557 states. [2021-08-06 19:45:13,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4557 to 4536. [2021-08-06 19:45:13,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4536 states, 4535 states have (on average 2.1671444321940463) internal successors, (9828), 4535 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4536 states to 4536 states and 9828 transitions. [2021-08-06 19:45:13,995 INFO L78 Accepts]: Start accepts. Automaton has 4536 states and 9828 transitions. Word has length 23 [2021-08-06 19:45:13,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:13,995 INFO L470 AbstractCegarLoop]: Abstraction has 4536 states and 9828 transitions. [2021-08-06 19:45:13,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4536 states and 9828 transitions. [2021-08-06 19:45:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:45:14,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:14,000 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:14,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2021-08-06 19:45:14,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:14,201 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:45:14,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:14,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1848749697, now seen corresponding path program 255 times [2021-08-06 19:45:14,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:14,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580109518] [2021-08-06 19:45:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:14,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:14,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:14,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580109518] [2021-08-06 19:45:14,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580109518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:14,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158791757] [2021-08-06 19:45:14,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:45:14,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:14,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:14,379 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:45:14,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2021-08-06 19:45:17,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-06 19:45:17,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:45:17,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-06 19:45:17,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:18,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:45:18,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 94 treesize of output 354 [2021-08-06 19:45:21,732 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:21,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158791757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:21,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:21,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:45:21,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141435743] [2021-08-06 19:45:21,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:45:21,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:21,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:45:21,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:45:21,733 INFO L87 Difference]: Start difference. First operand 4536 states and 9828 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:22,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:22,198 INFO L93 Difference]: Finished difference Result 4608 states and 9967 transitions. [2021-08-06 19:45:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:45:22,198 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:45:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:22,205 INFO L225 Difference]: With dead ends: 4608 [2021-08-06 19:45:22,205 INFO L226 Difference]: Without dead ends: 4604 [2021-08-06 19:45:22,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 421.8ms TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:45:22,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2021-08-06 19:45:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 4548. [2021-08-06 19:45:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4548 states, 4547 states have (on average 2.169342423575984) internal successors, (9864), 4547 states have internal predecessors, (9864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4548 states to 4548 states and 9864 transitions. [2021-08-06 19:45:22,265 INFO L78 Accepts]: Start accepts. Automaton has 4548 states and 9864 transitions. Word has length 23 [2021-08-06 19:45:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:22,265 INFO L470 AbstractCegarLoop]: Abstraction has 4548 states and 9864 transitions. [2021-08-06 19:45:22,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 4548 states and 9864 transitions. [2021-08-06 19:45:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:45:22,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:22,270 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:22,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2021-08-06 19:45:22,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:22,471 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:45:22,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:22,471 INFO L82 PathProgramCache]: Analyzing trace with hash 41295234, now seen corresponding path program 256 times [2021-08-06 19:45:22,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:22,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614492241] [2021-08-06 19:45:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:22,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:45:22,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:22,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614492241] [2021-08-06 19:45:22,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614492241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:22,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520924837] [2021-08-06 19:45:22,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:45:22,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:22,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:22,567 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:45:22,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2021-08-06 19:45:25,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:45:25,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:45:25,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:45:25,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:25,714 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:25,746 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:45:25,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520924837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:25,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:25,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:45:25,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75132810] [2021-08-06 19:45:25,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:45:25,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:25,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:45:25,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:45:25,767 INFO L87 Difference]: Start difference. First operand 4548 states and 9864 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:25,858 INFO L93 Difference]: Finished difference Result 4647 states and 9948 transitions. [2021-08-06 19:45:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:45:25,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:45:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:25,866 INFO L225 Difference]: With dead ends: 4647 [2021-08-06 19:45:25,866 INFO L226 Difference]: Without dead ends: 4647 [2021-08-06 19:45:25,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:45:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4647 states. [2021-08-06 19:45:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4647 to 4507. [2021-08-06 19:45:25,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4507 states, 4506 states have (on average 2.163559698180204) internal successors, (9749), 4506 states have internal predecessors, (9749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:25,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 9749 transitions. [2021-08-06 19:45:25,928 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 9749 transitions. Word has length 23 [2021-08-06 19:45:25,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:25,928 INFO L470 AbstractCegarLoop]: Abstraction has 4507 states and 9749 transitions. [2021-08-06 19:45:25,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:25,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 9749 transitions. [2021-08-06 19:45:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:45:25,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:25,932 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:25,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2021-08-06 19:45:26,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-08-06 19:45:26,133 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:45:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1652236192, now seen corresponding path program 257 times [2021-08-06 19:45:26,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:26,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051626961] [2021-08-06 19:45:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:26,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:26,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:26,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051626961] [2021-08-06 19:45:26,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051626961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:26,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707393398] [2021-08-06 19:45:26,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:45:26,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:26,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:26,225 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:45:26,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2021-08-06 19:45:29,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:45:29,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:45:29,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:45:29,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:29,298 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:29,299 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:29,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707393398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:29,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:29,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:45:29,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486211571] [2021-08-06 19:45:29,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:45:29,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:45:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:45:29,319 INFO L87 Difference]: Start difference. First operand 4507 states and 9749 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:29,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:29,423 INFO L93 Difference]: Finished difference Result 4964 states and 10575 transitions. [2021-08-06 19:45:29,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:45:29,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:45:29,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:29,429 INFO L225 Difference]: With dead ends: 4964 [2021-08-06 19:45:29,429 INFO L226 Difference]: Without dead ends: 4964 [2021-08-06 19:45:29,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:45:29,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4964 states. [2021-08-06 19:45:29,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4964 to 3226. [2021-08-06 19:45:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 3225 states have (on average 2.1475968992248062) internal successors, (6926), 3225 states have internal predecessors, (6926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:29,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 6926 transitions. [2021-08-06 19:45:29,478 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 6926 transitions. Word has length 23 [2021-08-06 19:45:29,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:29,478 INFO L470 AbstractCegarLoop]: Abstraction has 3226 states and 6926 transitions. [2021-08-06 19:45:29,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 6926 transitions. [2021-08-06 19:45:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:45:29,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:29,481 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:29,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2021-08-06 19:45:29,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:29,682 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:45:29,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:29,682 INFO L82 PathProgramCache]: Analyzing trace with hash 51798338, now seen corresponding path program 258 times [2021-08-06 19:45:29,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:29,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344913028] [2021-08-06 19:45:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:29,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:29,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:29,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344913028] [2021-08-06 19:45:29,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344913028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:29,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332957615] [2021-08-06 19:45:29,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:45:29,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:29,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:29,781 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:45:29,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2021-08-06 19:45:32,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:45:32,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:45:32,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:45:32,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:32,911 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:32,911 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:32,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332957615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:32,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:32,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:45:32,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094849347] [2021-08-06 19:45:32,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:45:32,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:32,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:45:32,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:45:32,932 INFO L87 Difference]: Start difference. First operand 3226 states and 6926 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:33,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:33,059 INFO L93 Difference]: Finished difference Result 5122 states and 10873 transitions. [2021-08-06 19:45:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:45:33,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:45:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:33,065 INFO L225 Difference]: With dead ends: 5122 [2021-08-06 19:45:33,065 INFO L226 Difference]: Without dead ends: 5122 [2021-08-06 19:45:33,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-08-06 19:45:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2021-08-06 19:45:33,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 4354. [2021-08-06 19:45:33,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 4353 states have (on average 2.15368711233632) internal successors, (9375), 4353 states have internal predecessors, (9375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:33,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 9375 transitions. [2021-08-06 19:45:33,139 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 9375 transitions. Word has length 23 [2021-08-06 19:45:33,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:33,139 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 9375 transitions. [2021-08-06 19:45:33,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:33,139 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 9375 transitions. [2021-08-06 19:45:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:45:33,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:33,144 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:33,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2021-08-06 19:45:33,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:33,344 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:45:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:33,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1371138031, now seen corresponding path program 259 times [2021-08-06 19:45:33,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:33,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047784075] [2021-08-06 19:45:33,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:33,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:33,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:33,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047784075] [2021-08-06 19:45:33,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047784075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:33,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321850149] [2021-08-06 19:45:33,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:45:33,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:33,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:33,507 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:45:33,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2021-08-06 19:45:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:36,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 19:45:36,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:37,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:45:37,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 77 treesize of output 337 [2021-08-06 19:45:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:42,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321850149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:42,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:42,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:45:42,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685650796] [2021-08-06 19:45:42,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:45:42,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:42,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:45:42,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:45:42,188 INFO L87 Difference]: Start difference. First operand 4354 states and 9375 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:42,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:42,628 INFO L93 Difference]: Finished difference Result 4406 states and 9471 transitions. [2021-08-06 19:45:42,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:45:42,628 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:45:42,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:42,634 INFO L225 Difference]: With dead ends: 4406 [2021-08-06 19:45:42,634 INFO L226 Difference]: Without dead ends: 4401 [2021-08-06 19:45:42,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 418.3ms TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:45:42,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-08-06 19:45:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 4358. [2021-08-06 19:45:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4358 states, 4357 states have (on average 2.1535460179022263) internal successors, (9383), 4357 states have internal predecessors, (9383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4358 states to 4358 states and 9383 transitions. [2021-08-06 19:45:42,693 INFO L78 Accepts]: Start accepts. Automaton has 4358 states and 9383 transitions. Word has length 23 [2021-08-06 19:45:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:42,693 INFO L470 AbstractCegarLoop]: Abstraction has 4358 states and 9383 transitions. [2021-08-06 19:45:42,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4358 states and 9383 transitions. [2021-08-06 19:45:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:45:42,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:42,699 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:42,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2021-08-06 19:45:42,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:42,899 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:45:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:42,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1181018930, now seen corresponding path program 260 times [2021-08-06 19:45:42,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:42,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298095981] [2021-08-06 19:45:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:42,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:45:42,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:42,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298095981] [2021-08-06 19:45:42,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298095981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:42,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944956750] [2021-08-06 19:45:42,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:45:42,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:42,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:42,985 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:45:42,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2021-08-06 19:45:46,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:45:46,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:45:46,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:45:46,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:46,193 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:46,193 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:45:46,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944956750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:46,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:46,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-08-06 19:45:46,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769499140] [2021-08-06 19:45:46,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:45:46,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:46,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:45:46,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:45:46,213 INFO L87 Difference]: Start difference. First operand 4358 states and 9383 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:46,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:46,291 INFO L93 Difference]: Finished difference Result 4818 states and 10242 transitions. [2021-08-06 19:45:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:45:46,291 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:45:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:46,297 INFO L225 Difference]: With dead ends: 4818 [2021-08-06 19:45:46,297 INFO L226 Difference]: Without dead ends: 4818 [2021-08-06 19:45:46,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:45:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4818 states. [2021-08-06 19:45:46,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4818 to 4413. [2021-08-06 19:45:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 4412 states have (on average 2.1570716228467814) internal successors, (9517), 4412 states have internal predecessors, (9517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 9517 transitions. [2021-08-06 19:45:46,355 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 9517 transitions. Word has length 23 [2021-08-06 19:45:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:46,355 INFO L470 AbstractCegarLoop]: Abstraction has 4413 states and 9517 transitions. [2021-08-06 19:45:46,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 9517 transitions. [2021-08-06 19:45:46,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:45:46,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:46,360 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:46,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Ended with exit code 0 [2021-08-06 19:45:46,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:46,560 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:45:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:46,560 INFO L82 PathProgramCache]: Analyzing trace with hash -436316432, now seen corresponding path program 261 times [2021-08-06 19:45:46,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:46,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954405732] [2021-08-06 19:45:46,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:46,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:46,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:46,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954405732] [2021-08-06 19:45:46,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954405732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:46,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073860325] [2021-08-06 19:45:46,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:45:46,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:46,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:46,647 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:45:46,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2021-08-06 19:45:49,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 19:45:49,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:45:49,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:45:49,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:49,803 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:49,804 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:49,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073860325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:49,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:49,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:45:49,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786360509] [2021-08-06 19:45:49,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:45:49,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:49,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:45:49,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:45:49,824 INFO L87 Difference]: Start difference. First operand 4413 states and 9517 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:49,912 INFO L93 Difference]: Finished difference Result 4864 states and 10317 transitions. [2021-08-06 19:45:49,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:45:49,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:45:49,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:49,919 INFO L225 Difference]: With dead ends: 4864 [2021-08-06 19:45:49,919 INFO L226 Difference]: Without dead ends: 4864 [2021-08-06 19:45:49,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:45:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4864 states. [2021-08-06 19:45:49,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4864 to 4399. [2021-08-06 19:45:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4399 states, 4398 states have (on average 2.153706230104593) internal successors, (9472), 4398 states have internal predecessors, (9472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4399 states to 4399 states and 9472 transitions. [2021-08-06 19:45:49,976 INFO L78 Accepts]: Start accepts. Automaton has 4399 states and 9472 transitions. Word has length 23 [2021-08-06 19:45:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:49,976 INFO L470 AbstractCegarLoop]: Abstraction has 4399 states and 9472 transitions. [2021-08-06 19:45:49,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 4399 states and 9472 transitions. [2021-08-06 19:45:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:45:49,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:49,980 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:50,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2021-08-06 19:45:50,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:50,181 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:45:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:50,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1174624526, now seen corresponding path program 262 times [2021-08-06 19:45:50,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:50,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345613119] [2021-08-06 19:45:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:50,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:45:50,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:50,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345613119] [2021-08-06 19:45:50,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345613119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:50,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831564674] [2021-08-06 19:45:50,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:45:50,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:50,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:50,269 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:45:50,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2021-08-06 19:45:53,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:45:53,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:45:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:45:53,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:53,459 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:53,459 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:45:53,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831564674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:53,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:53,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-08-06 19:45:53,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262091698] [2021-08-06 19:45:53,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:45:53,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:53,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:45:53,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:45:53,480 INFO L87 Difference]: Start difference. First operand 4399 states and 9472 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:53,572 INFO L93 Difference]: Finished difference Result 8682 states and 18735 transitions. [2021-08-06 19:45:53,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:45:53,572 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:45:53,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:53,584 INFO L225 Difference]: With dead ends: 8682 [2021-08-06 19:45:53,585 INFO L226 Difference]: Without dead ends: 8682 [2021-08-06 19:45:53,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:45:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8682 states. [2021-08-06 19:45:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8682 to 8608. [2021-08-06 19:45:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8608 states, 8607 states have (on average 2.1645172533983965) internal successors, (18630), 8607 states have internal predecessors, (18630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8608 states to 8608 states and 18630 transitions. [2021-08-06 19:45:53,711 INFO L78 Accepts]: Start accepts. Automaton has 8608 states and 18630 transitions. Word has length 23 [2021-08-06 19:45:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:53,711 INFO L470 AbstractCegarLoop]: Abstraction has 8608 states and 18630 transitions. [2021-08-06 19:45:53,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 8608 states and 18630 transitions. [2021-08-06 19:45:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:45:53,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:53,720 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:53,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2021-08-06 19:45:53,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-08-06 19:45:53,920 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:45:53,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:53,920 INFO L82 PathProgramCache]: Analyzing trace with hash -425813328, now seen corresponding path program 263 times [2021-08-06 19:45:53,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:53,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369463493] [2021-08-06 19:45:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:53,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:54,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:54,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369463493] [2021-08-06 19:45:54,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369463493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:54,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112365739] [2021-08-06 19:45:54,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:45:54,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:54,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:54,018 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:45:54,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2021-08-06 19:45:57,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-06 19:45:57,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:45:57,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:45:57,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:45:57,220 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:57,220 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:45:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:57,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112365739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:57,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:45:57,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 19:45:57,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174340806] [2021-08-06 19:45:57,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:45:57,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:45:57,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:45:57,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:45:57,243 INFO L87 Difference]: Start difference. First operand 8608 states and 18630 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:45:57,366 INFO L93 Difference]: Finished difference Result 9065 states and 19501 transitions. [2021-08-06 19:45:57,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:45:57,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:45:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:45:57,378 INFO L225 Difference]: With dead ends: 9065 [2021-08-06 19:45:57,378 INFO L226 Difference]: Without dead ends: 9065 [2021-08-06 19:45:57,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:45:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9065 states. [2021-08-06 19:45:57,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9065 to 8628. [2021-08-06 19:45:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8628 states, 8627 states have (on average 2.164135852555929) internal successors, (18670), 8627 states have internal predecessors, (18670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:57,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8628 states to 8628 states and 18670 transitions. [2021-08-06 19:45:57,517 INFO L78 Accepts]: Start accepts. Automaton has 8628 states and 18670 transitions. Word has length 23 [2021-08-06 19:45:57,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:45:57,517 INFO L470 AbstractCegarLoop]: Abstraction has 8628 states and 18670 transitions. [2021-08-06 19:45:57,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:45:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 8628 states and 18670 transitions. [2021-08-06 19:45:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:45:57,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:45:57,527 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:45:57,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2021-08-06 19:45:57,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-08-06 19:45:57,727 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:45:57,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:45:57,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1500220750, now seen corresponding path program 264 times [2021-08-06 19:45:57,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:45:57,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253963144] [2021-08-06 19:45:57,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:45:57,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:45:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:45:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:45:57,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:45:57,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253963144] [2021-08-06 19:45:57,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253963144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:45:57,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443611131] [2021-08-06 19:45:57,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:45:57,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:45:57,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:45:57,830 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:45:57,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2021-08-06 19:46:00,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-06 19:46:00,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:00,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:46:00,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:01,025 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:01,025 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:01,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443611131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:01,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:01,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-08-06 19:46:01,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938384443] [2021-08-06 19:46:01,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:46:01,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:01,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:46:01,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:46:01,045 INFO L87 Difference]: Start difference. First operand 8628 states and 18670 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:01,235 INFO L93 Difference]: Finished difference Result 13693 states and 29266 transitions. [2021-08-06 19:46:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:46:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:46:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:01,258 INFO L225 Difference]: With dead ends: 13693 [2021-08-06 19:46:01,258 INFO L226 Difference]: Without dead ends: 13693 [2021-08-06 19:46:01,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:46:01,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13693 states. [2021-08-06 19:46:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13693 to 13095. [2021-08-06 19:46:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13095 states, 13094 states have (on average 2.1469375286390715) internal successors, (28112), 13094 states have internal predecessors, (28112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:01,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13095 states to 13095 states and 28112 transitions. [2021-08-06 19:46:01,481 INFO L78 Accepts]: Start accepts. Automaton has 13095 states and 28112 transitions. Word has length 23 [2021-08-06 19:46:01,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:01,481 INFO L470 AbstractCegarLoop]: Abstraction has 13095 states and 28112 transitions. [2021-08-06 19:46:01,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:01,482 INFO L276 IsEmpty]: Start isEmpty. Operand 13095 states and 28112 transitions. [2021-08-06 19:46:01,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:46:01,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:01,493 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:01,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2021-08-06 19:46:01,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-08-06 19:46:01,694 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:01,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:01,694 INFO L82 PathProgramCache]: Analyzing trace with hash -12166075, now seen corresponding path program 265 times [2021-08-06 19:46:01,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:01,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339834076] [2021-08-06 19:46:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:01,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 19:46:01,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:01,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339834076] [2021-08-06 19:46:01,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339834076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:01,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231610857] [2021-08-06 19:46:01,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:46:01,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:01,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:01,849 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:46:01,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2021-08-06 19:46:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:04,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 19:46:04,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:05,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:46:05,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 77 treesize of output 337 [2021-08-06 19:46:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:09,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231610857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:09,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:09,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-08-06 19:46:09,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983175921] [2021-08-06 19:46:09,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 19:46:09,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:09,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 19:46:09,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:46:09,106 INFO L87 Difference]: Start difference. First operand 13095 states and 28112 transitions. Second operand has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:09,609 INFO L93 Difference]: Finished difference Result 13114 states and 28143 transitions. [2021-08-06 19:46:09,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:46:09,609 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:46:09,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:09,627 INFO L225 Difference]: With dead ends: 13114 [2021-08-06 19:46:09,627 INFO L226 Difference]: Without dead ends: 13106 [2021-08-06 19:46:09,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 484.9ms TimeCoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:46:09,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13106 states. [2021-08-06 19:46:09,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13106 to 13091. [2021-08-06 19:46:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13091 states, 13090 states have (on average 2.1466768525592057) internal successors, (28100), 13090 states have internal predecessors, (28100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:09,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13091 states to 13091 states and 28100 transitions. [2021-08-06 19:46:09,892 INFO L78 Accepts]: Start accepts. Automaton has 13091 states and 28100 transitions. Word has length 23 [2021-08-06 19:46:09,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:09,892 INFO L470 AbstractCegarLoop]: Abstraction has 13091 states and 28100 transitions. [2021-08-06 19:46:09,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:09,892 INFO L276 IsEmpty]: Start isEmpty. Operand 13091 states and 28100 transitions. [2021-08-06 19:46:09,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:46:09,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:09,902 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:09,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:10,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-08-06 19:46:10,109 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:10,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:10,109 INFO L82 PathProgramCache]: Analyzing trace with hash -549921727, now seen corresponding path program 266 times [2021-08-06 19:46:10,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:10,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813876766] [2021-08-06 19:46:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:10,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:10,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:10,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813876766] [2021-08-06 19:46:10,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813876766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:10,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409082472] [2021-08-06 19:46:10,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:46:10,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:10,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:10,273 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:46:10,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2021-08-06 19:46:13,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:46:13,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:13,374 WARN L261 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-06 19:46:13,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:14,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 19:46:14,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 17 new quantified variables, introduced 36 case distinctions, treesize of input 77 treesize of output 337 [2021-08-06 19:46:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:17,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409082472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:17,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:17,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-06 19:46:17,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779488397] [2021-08-06 19:46:17,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 19:46:17,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:17,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 19:46:17,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:46:17,573 INFO L87 Difference]: Start difference. First operand 13091 states and 28100 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:18,132 INFO L93 Difference]: Finished difference Result 13139 states and 28186 transitions. [2021-08-06 19:46:18,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 19:46:18,132 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:46:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:18,154 INFO L225 Difference]: With dead ends: 13139 [2021-08-06 19:46:18,154 INFO L226 Difference]: Without dead ends: 13135 [2021-08-06 19:46:18,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 417.3ms TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:46:18,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13135 states. [2021-08-06 19:46:18,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13135 to 13093. [2021-08-06 19:46:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13093 states, 13092 states have (on average 2.1468072105102354) internal successors, (28106), 13092 states have internal predecessors, (28106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13093 states to 13093 states and 28106 transitions. [2021-08-06 19:46:18,362 INFO L78 Accepts]: Start accepts. Automaton has 13093 states and 28106 transitions. Word has length 23 [2021-08-06 19:46:18,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:18,362 INFO L470 AbstractCegarLoop]: Abstraction has 13093 states and 28106 transitions. [2021-08-06 19:46:18,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:18,362 INFO L276 IsEmpty]: Start isEmpty. Operand 13093 states and 28106 transitions. [2021-08-06 19:46:18,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:46:18,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:18,373 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:18,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2021-08-06 19:46:18,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-08-06 19:46:18,574 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1937591106, now seen corresponding path program 267 times [2021-08-06 19:46:18,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:18,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608461774] [2021-08-06 19:46:18,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:18,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:18,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:18,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608461774] [2021-08-06 19:46:18,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608461774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:18,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673019922] [2021-08-06 19:46:18,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:46:18,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:18,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:18,715 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:46:18,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2021-08-06 19:46:21,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 19:46:21,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:21,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:46:21,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:21,935 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:21,936 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:21,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673019922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:21,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:21,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-06 19:46:21,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401512274] [2021-08-06 19:46:21,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:46:21,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:21,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:46:21,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:46:21,957 INFO L87 Difference]: Start difference. First operand 13093 states and 28106 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:22,117 INFO L93 Difference]: Finished difference Result 15285 states and 32405 transitions. [2021-08-06 19:46:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:46:22,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:46:22,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:22,147 INFO L225 Difference]: With dead ends: 15285 [2021-08-06 19:46:22,147 INFO L226 Difference]: Without dead ends: 15285 [2021-08-06 19:46:22,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:46:22,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15285 states. [2021-08-06 19:46:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15285 to 13249. [2021-08-06 19:46:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13249 states, 13248 states have (on average 2.145304951690821) internal successors, (28421), 13248 states have internal predecessors, (28421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13249 states to 13249 states and 28421 transitions. [2021-08-06 19:46:22,400 INFO L78 Accepts]: Start accepts. Automaton has 13249 states and 28421 transitions. Word has length 23 [2021-08-06 19:46:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:22,400 INFO L470 AbstractCegarLoop]: Abstraction has 13249 states and 28421 transitions. [2021-08-06 19:46:22,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:22,400 INFO L276 IsEmpty]: Start isEmpty. Operand 13249 states and 28421 transitions. [2021-08-06 19:46:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:46:22,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:22,412 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:22,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2021-08-06 19:46:22,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-08-06 19:46:22,613 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:22,613 INFO L82 PathProgramCache]: Analyzing trace with hash -746435232, now seen corresponding path program 268 times [2021-08-06 19:46:22,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:22,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870354256] [2021-08-06 19:46:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:22,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:22,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:22,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870354256] [2021-08-06 19:46:22,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870354256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:22,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104464333] [2021-08-06 19:46:22,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:46:22,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:22,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:22,815 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:46:22,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2021-08-06 19:46:26,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:46:26,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:26,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:46:26,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:26,116 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:26,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:26,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104464333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:26,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:26,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:46:26,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101054056] [2021-08-06 19:46:26,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:46:26,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:46:26,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:46:26,140 INFO L87 Difference]: Start difference. First operand 13249 states and 28421 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:26,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:26,304 INFO L93 Difference]: Finished difference Result 14686 states and 31094 transitions. [2021-08-06 19:46:26,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:46:26,305 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:46:26,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:26,325 INFO L225 Difference]: With dead ends: 14686 [2021-08-06 19:46:26,325 INFO L226 Difference]: Without dead ends: 14686 [2021-08-06 19:46:26,326 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-08-06 19:46:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14686 states. [2021-08-06 19:46:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14686 to 12868. [2021-08-06 19:46:26,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12868 states, 12867 states have (on average 2.136006839201057) internal successors, (27484), 12867 states have internal predecessors, (27484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:26,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12868 states to 12868 states and 27484 transitions. [2021-08-06 19:46:26,566 INFO L78 Accepts]: Start accepts. Automaton has 12868 states and 27484 transitions. Word has length 23 [2021-08-06 19:46:26,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:26,566 INFO L470 AbstractCegarLoop]: Abstraction has 12868 states and 27484 transitions. [2021-08-06 19:46:26,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:26,566 INFO L276 IsEmpty]: Start isEmpty. Operand 12868 states and 27484 transitions. [2021-08-06 19:46:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:46:26,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:26,578 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:26,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2021-08-06 19:46:26,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:26,778 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:26,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:26,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1948094210, now seen corresponding path program 269 times [2021-08-06 19:46:26,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:26,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768911291] [2021-08-06 19:46:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:26,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:26,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:26,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768911291] [2021-08-06 19:46:26,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768911291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:26,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725372111] [2021-08-06 19:46:26,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:46:26,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:26,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:26,927 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:46:26,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2021-08-06 19:46:30,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-06 19:46:30,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:30,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:46:30,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:30,315 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:30,316 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:30,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725372111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:30,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:30,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-06 19:46:30,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4552516] [2021-08-06 19:46:30,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:46:30,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:46:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:46:30,338 INFO L87 Difference]: Start difference. First operand 12868 states and 27484 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:30,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:30,488 INFO L93 Difference]: Finished difference Result 21080 states and 44826 transitions. [2021-08-06 19:46:30,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 19:46:30,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:46:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:30,567 INFO L225 Difference]: With dead ends: 21080 [2021-08-06 19:46:30,567 INFO L226 Difference]: Without dead ends: 21080 [2021-08-06 19:46:30,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-08-06 19:46:30,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21080 states. [2021-08-06 19:46:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21080 to 20068. [2021-08-06 19:46:30,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20068 states, 20067 states have (on average 2.134648926097573) internal successors, (42836), 20067 states have internal predecessors, (42836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20068 states to 20068 states and 42836 transitions. [2021-08-06 19:46:30,896 INFO L78 Accepts]: Start accepts. Automaton has 20068 states and 42836 transitions. Word has length 23 [2021-08-06 19:46:30,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:30,896 INFO L470 AbstractCegarLoop]: Abstraction has 20068 states and 42836 transitions. [2021-08-06 19:46:30,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:30,896 INFO L276 IsEmpty]: Start isEmpty. Operand 20068 states and 42836 transitions. [2021-08-06 19:46:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:46:30,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:30,912 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:30,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2021-08-06 19:46:31,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:31,112 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:31,113 INFO L82 PathProgramCache]: Analyzing trace with hash -420839008, now seen corresponding path program 270 times [2021-08-06 19:46:31,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:31,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205077335] [2021-08-06 19:46:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:31,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:31,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:31,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205077335] [2021-08-06 19:46:31,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205077335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:31,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47385201] [2021-08-06 19:46:31,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:46:31,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:31,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:31,225 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:46:31,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2021-08-06 19:46:34,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-06 19:46:34,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:46:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:46:34,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:34,492 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:34,492 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:34,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47385201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:34,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:34,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 19:46:34,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119705519] [2021-08-06 19:46:34,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:46:34,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:34,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:46:34,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:46:34,513 INFO L87 Difference]: Start difference. First operand 20068 states and 42836 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:34,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:34,691 INFO L93 Difference]: Finished difference Result 21672 states and 46010 transitions. [2021-08-06 19:46:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:46:34,691 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:46:34,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:34,728 INFO L225 Difference]: With dead ends: 21672 [2021-08-06 19:46:34,728 INFO L226 Difference]: Without dead ends: 21672 [2021-08-06 19:46:34,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:46:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21672 states. [2021-08-06 19:46:35,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21672 to 16790. [2021-08-06 19:46:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16790 states, 16789 states have (on average 2.139793912680922) internal successors, (35925), 16789 states have internal predecessors, (35925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:35,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16790 states to 16790 states and 35925 transitions. [2021-08-06 19:46:35,082 INFO L78 Accepts]: Start accepts. Automaton has 16790 states and 35925 transitions. Word has length 23 [2021-08-06 19:46:35,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:35,082 INFO L470 AbstractCegarLoop]: Abstraction has 16790 states and 35925 transitions. [2021-08-06 19:46:35,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:35,082 INFO L276 IsEmpty]: Start isEmpty. Operand 16790 states and 35925 transitions. [2021-08-06 19:46:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:46:35,095 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:35,095 INFO L512 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:35,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2021-08-06 19:46:35,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:35,296 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:35,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:35,296 INFO L82 PathProgramCache]: Analyzing trace with hash -843324734, now seen corresponding path program 271 times [2021-08-06 19:46:35,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:35,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688347804] [2021-08-06 19:46:35,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:35,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:35,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:35,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688347804] [2021-08-06 19:46:35,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688347804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:35,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073161318] [2021-08-06 19:46:35,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:46:35,401 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:35,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:35,402 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:46:35,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2021-08-06 19:46:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:38,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:46:38,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:46:38,718 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:38,719 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 19:46:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:46:38,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073161318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:38,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:46:38,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-06 19:46:38,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220983789] [2021-08-06 19:46:38,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:46:38,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:46:38,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:46:38,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:46:38,740 INFO L87 Difference]: Start difference. First operand 16790 states and 35925 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:46:38,999 INFO L93 Difference]: Finished difference Result 21171 states and 44968 transitions. [2021-08-06 19:46:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:46:39,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:46:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:46:39,028 INFO L225 Difference]: With dead ends: 21171 [2021-08-06 19:46:39,028 INFO L226 Difference]: Without dead ends: 21171 [2021-08-06 19:46:39,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:46:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21171 states. [2021-08-06 19:46:39,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21171 to 19684. [2021-08-06 19:46:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19684 states, 19683 states have (on average 2.134481532286745) internal successors, (42013), 19683 states have internal predecessors, (42013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19684 states to 19684 states and 42013 transitions. [2021-08-06 19:46:39,344 INFO L78 Accepts]: Start accepts. Automaton has 19684 states and 42013 transitions. Word has length 23 [2021-08-06 19:46:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:46:39,344 INFO L470 AbstractCegarLoop]: Abstraction has 19684 states and 42013 transitions. [2021-08-06 19:46:39,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:46:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 19684 states and 42013 transitions. [2021-08-06 19:46:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:46:39,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:46:39,361 INFO L512 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:46:39,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2021-08-06 19:46:39,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:39,562 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-06 19:46:39,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:46:39,562 INFO L82 PathProgramCache]: Analyzing trace with hash -416682671, now seen corresponding path program 272 times [2021-08-06 19:46:39,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:46:39,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326215259] [2021-08-06 19:46:39,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:46:39,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:46:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:46:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:46:39,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:46:39,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326215259] [2021-08-06 19:46:39,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326215259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:46:39,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949465139] [2021-08-06 19:46:39,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:46:39,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:39,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:46:39,740 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:46:39,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 19:46:41,766 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 19:46:41,766 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 19:46:42,794 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 19:46:42,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:42,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2021-08-06 19:46:42,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:46:42,995 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 9,while executing Executor. [2021-08-06 19:46:42,997 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 19:46:42,997 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 19:46:43,000 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 19:46:43,000 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 19:46:43,001 INFO L202 PluginConnector]: Adding new model unroll-cond-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 07:46:43 BasicIcfg [2021-08-06 19:46:43,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 19:46:43,001 INFO L168 Benchmark]: Toolchain (without parser) took 767164.95 ms. Allocated memory was 213.9 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 194.0 MB in the beginning and 896.8 MB in the end (delta: -702.8 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-08-06 19:46:43,001 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.40 ms. Allocated memory is still 213.9 MB. Free memory was 195.2 MB in the beginning and 195.1 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 19:46:43,001 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.85 ms. Allocated memory is still 213.9 MB. Free memory was 194.0 MB in the beginning and 192.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 19:46:43,002 INFO L168 Benchmark]: Boogie Preprocessor took 12.28 ms. Allocated memory is still 213.9 MB. Free memory was 192.5 MB in the beginning and 191.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 19:46:43,002 INFO L168 Benchmark]: RCFGBuilder took 237.86 ms. Allocated memory is still 213.9 MB. Free memory was 191.5 MB in the beginning and 176.6 MB in the end (delta: 14.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-08-06 19:46:43,002 INFO L168 Benchmark]: TraceAbstraction took 766893.31 ms. Allocated memory was 213.9 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 176.1 MB in the beginning and 896.8 MB in the end (delta: -720.8 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-08-06 19:46:43,002 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 0.40 ms. Allocated memory is still 213.9 MB. Free memory was 195.2 MB in the beginning and 195.1 MB in the end (delta: 85.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 17.85 ms. Allocated memory is still 213.9 MB. Free memory was 194.0 MB in the beginning and 192.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.28 ms. Allocated memory is still 213.9 MB. Free memory was 192.5 MB in the beginning and 191.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 237.86 ms. Allocated memory is still 213.9 MB. Free memory was 191.5 MB in the beginning and 176.6 MB in the end (delta: 14.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 766893.31 ms. Allocated memory was 213.9 MB in the beginning and 2.7 GB in the end (delta: 2.5 GB). Free memory was 176.1 MB in the beginning and 896.8 MB in the end (delta: -720.8 MB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 15, positive: 11, positive conditional: 11, positive unconditional: 0, negative: 4, negative conditional: 4, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 11, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 11, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 11, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 11, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 11, unknown conditional: 0, unknown unconditional: 11] , Statistics on independence cache: Total cache size (in pairs): 11, Positive cache size: 11, Positive conditional cache size: 0, Positive unconditional cache size: 11, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 4 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 9,while executing Executor. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 9,while executing Executor. - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 24 with TraceHistMax 9,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 766834.6ms, OverallIterations: 276, TraceHistogramMax: 9, EmptinessCheckTime: 494.1ms, AutomataDifference: 44227.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 68.1ms, PartialOrderReductionTime: 50.2ms, HoareTripleCheckerStatistics: 4257 SDtfs, 10227 SDslu, 24677 SDs, 0 SdLazy, 62836 SolverSat, 4959 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22490.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9712 GetRequests, 4449 SyntacticMatches, 164 SemanticMatches, 5099 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23461 ImplicationChecksByTransitivity, 41286.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20068occurred in iteration=273, InterpolantAutomatonStates: 4298, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7366.7ms AutomataMinimizationTime, 275 MinimizatonAttempts, 48319 StatesRemovedByMinimization, 272 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 788.1ms SsaConstructionTime, 3517.8ms SatisfiabilityAnalysisTime, 262085.3ms InterpolantComputationTime, 10549 NumberOfCodeBlocks, 10549 NumberOfCodeBlocksAsserted, 1108 NumberOfCheckSat, 10001 ConstructedInterpolants, 2 QuantifiedInterpolants, 68526 SizeOfPredicates, 247 NumberOfNonLiveVariables, 21133 ConjunctsInSsa, 5432 ConjunctsInUnsatCore, 548 InterpolantComputations, 2 PerfectInterpolantSequences, 3885/16509 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