/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:30:26,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:30:26,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:30:26,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:30:26,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 12:30:26,413 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:30:26,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:30:26,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:30:26,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:30:26,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:30:26,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:30:26,416 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:30:26,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:30:26,416 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:30:26,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:30:26,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:30:26,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:30:26,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:30:26,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:30:26,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:30:26,418 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:30:26,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:30:26,418 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:30:26,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:30:26,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:30:26,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:30:26,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:30:26,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:30:26,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:30:26,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:30:26,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:30:26,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:30:26,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:30:26,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:30:26,419 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:30:26,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:30:26,420 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:30:26,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:30:26,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:30:26,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:30:26,738 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:30:26,739 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:30:26,740 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl [2021-08-21 12:30:26,740 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl' [2021-08-21 12:30:26,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:30:26,775 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:30:26,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:30:26,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:30:26,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:30:26,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:26" (1/1) ... [2021-08-21 12:30:26,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:26" (1/1) ... [2021-08-21 12:30:26,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:30:26,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:30:26,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:30:26,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:30:26,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:26" (1/1) ... [2021-08-21 12:30:26,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:26" (1/1) ... [2021-08-21 12:30:26,807 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:26" (1/1) ... [2021-08-21 12:30:26,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:26" (1/1) ... [2021-08-21 12:30:26,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:26" (1/1) ... [2021-08-21 12:30:26,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:26" (1/1) ... [2021-08-21 12:30:26,813 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:26" (1/1) ... [2021-08-21 12:30:26,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:30:26,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:30:26,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:30:26,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:30:26,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:26" (1/1) ... [2021-08-21 12:30:26,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:30:26,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:26,839 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) [2021-08-21 12:30:26,857 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 [2021-08-21 12:30:26,877 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:30:26,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:30:26,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:30:26,877 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:30:26,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:30:26,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:30:26,878 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:30:26,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:30:26,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:30:26,880 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:30:27,003 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:30:27,003 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:30:27,004 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:30:27 BoogieIcfgContainer [2021-08-21 12:30:27,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:30:27,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:30:27,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:30:27,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:30:27,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:30:26" (1/2) ... [2021-08-21 12:30:27,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1ddba7 and model type misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:30:27, skipping insertion in model container [2021-08-21 12:30:27,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:30:27" (2/2) ... [2021-08-21 12:30:27,010 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-2.wvr.bpl [2021-08-21 12:30:27,013 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:30:27,013 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:30:27,013 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:30:27,013 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:30:27,041 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 12:30:27,067 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:30:27,072 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 [2021-08-21 12:30:27,072 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 12:30:27,078 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 29 transitions, 74 flow [2021-08-21 12:30:27,094 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:27,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 12:30:27,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:27,102 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:27,103 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash -830155331, now seen corresponding path program 1 times [2021-08-21 12:30:27,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:27,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987146809] [2021-08-21 12:30:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:27,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:27,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:27,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987146809] [2021-08-21 12:30:27,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987146809] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:30:27,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:30:27,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:30:27,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685413481] [2021-08-21 12:30:27,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:30:27,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:27,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:30:27,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:30:27,219 INFO L87 Difference]: Start difference. First operand has 85 states, 84 states have (on average 2.1785714285714284) internal successors, (183), 84 states have internal predecessors, (183), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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) [2021-08-21 12:30:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:27,243 INFO L93 Difference]: Finished difference Result 134 states and 294 transitions. [2021-08-21 12:30:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:30:27,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 [2021-08-21 12:30:27,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:27,261 INFO L225 Difference]: With dead ends: 134 [2021-08-21 12:30:27,261 INFO L226 Difference]: Without dead ends: 127 [2021-08-21 12:30:27,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:30:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-21 12:30:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-08-21 12:30:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.161290322580645) internal successors, (201), 93 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2021-08-21 12:30:27,290 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 11 [2021-08-21 12:30:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:27,290 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2021-08-21 12:30:27,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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) [2021-08-21 12:30:27,290 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2021-08-21 12:30:27,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:30:27,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:27,291 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:27,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:30:27,292 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:27,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:27,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1624855747, now seen corresponding path program 1 times [2021-08-21 12:30:27,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:27,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983563783] [2021-08-21 12:30:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:27,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:27,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:27,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983563783] [2021-08-21 12:30:27,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983563783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:27,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989530488] [2021-08-21 12:30:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:27,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:27,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:27,334 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) [2021-08-21 12:30:27,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:30:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:27,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 12:30:27,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:27,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989530488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:27,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:27,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-08-21 12:30:27,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588267516] [2021-08-21 12:30:27,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:30:27,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:27,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:30:27,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:30:27,452 INFO L87 Difference]: Start difference. First operand 94 states and 201 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2021-08-21 12:30:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:27,486 INFO L93 Difference]: Finished difference Result 169 states and 356 transitions. [2021-08-21 12:30:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:30:27,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 16 [2021-08-21 12:30:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:27,488 INFO L225 Difference]: With dead ends: 169 [2021-08-21 12:30:27,488 INFO L226 Difference]: Without dead ends: 169 [2021-08-21 12:30:27,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-21 12:30:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-08-21 12:30:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-08-21 12:30:27,497 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 16 [2021-08-21 12:30:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:27,497 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-08-21 12:30:27,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2021-08-21 12:30:27,497 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-08-21 12:30:27,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:30:27,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:27,498 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:27,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:27,711 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 [2021-08-21 12:30:27,711 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:27,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1687027948, now seen corresponding path program 1 times [2021-08-21 12:30:27,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:27,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193179494] [2021-08-21 12:30:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:27,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:27,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:27,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193179494] [2021-08-21 12:30:27,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193179494] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:30:27,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:30:27,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:30:27,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654996835] [2021-08-21 12:30:27,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:30:27,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:27,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:30:27,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:30:27,739 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2021-08-21 12:30:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:27,772 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2021-08-21 12:30:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:30:27,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 16 [2021-08-21 12:30:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:27,774 INFO L225 Difference]: With dead ends: 188 [2021-08-21 12:30:27,774 INFO L226 Difference]: Without dead ends: 183 [2021-08-21 12:30:27,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:27,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-08-21 12:30:27,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 122. [2021-08-21 12:30:27,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1735537190082646) internal successors, (263), 121 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:27,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 263 transitions. [2021-08-21 12:30:27,782 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 263 transitions. Word has length 16 [2021-08-21 12:30:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:27,782 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 263 transitions. [2021-08-21 12:30:27,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2021-08-21 12:30:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 263 transitions. [2021-08-21 12:30:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:30:27,783 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:27,783 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:27,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:30:27,784 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:27,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:27,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1046891778, now seen corresponding path program 2 times [2021-08-21 12:30:27,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:27,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918509958] [2021-08-21 12:30:27,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:27,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:27,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:27,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:27,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918509958] [2021-08-21 12:30:27,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918509958] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:30:27,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:30:27,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:30:27,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451832511] [2021-08-21 12:30:27,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:30:27,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:27,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:30:27,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:30:27,811 INFO L87 Difference]: Start difference. First operand 122 states and 263 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2021-08-21 12:30:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:27,837 INFO L93 Difference]: Finished difference Result 156 states and 342 transitions. [2021-08-21 12:30:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:30:27,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 16 [2021-08-21 12:30:27,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:27,839 INFO L225 Difference]: With dead ends: 156 [2021-08-21 12:30:27,839 INFO L226 Difference]: Without dead ends: 156 [2021-08-21 12:30:27,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:27,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-21 12:30:27,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2021-08-21 12:30:27,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:27,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-08-21 12:30:27,844 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 16 [2021-08-21 12:30:27,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:27,844 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-08-21 12:30:27,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2021-08-21 12:30:27,845 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-08-21 12:30:27,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:30:27,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:27,846 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:27,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:30:27,846 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:27,846 INFO L82 PathProgramCache]: Analyzing trace with hash 283704697, now seen corresponding path program 2 times [2021-08-21 12:30:27,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:27,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401671734] [2021-08-21 12:30:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:27,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:27,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:27,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401671734] [2021-08-21 12:30:27,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401671734] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:30:27,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:30:27,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:30:27,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661302216] [2021-08-21 12:30:27,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:30:27,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:27,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:30:27,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:30:27,870 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2021-08-21 12:30:27,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:27,896 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-08-21 12:30:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:30:27,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 16 [2021-08-21 12:30:27,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:27,897 INFO L225 Difference]: With dead ends: 156 [2021-08-21 12:30:27,897 INFO L226 Difference]: Without dead ends: 154 [2021-08-21 12:30:27,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:27,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-21 12:30:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 104. [2021-08-21 12:30:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 223 transitions. [2021-08-21 12:30:27,902 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 223 transitions. Word has length 16 [2021-08-21 12:30:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:27,902 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 223 transitions. [2021-08-21 12:30:27,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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) [2021-08-21 12:30:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 223 transitions. [2021-08-21 12:30:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:30:27,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:27,903 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:27,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:30:27,903 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:27,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1511627156, now seen corresponding path program 1 times [2021-08-21 12:30:27,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:27,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641975939] [2021-08-21 12:30:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:27,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:28,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:28,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:28,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641975939] [2021-08-21 12:30:28,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641975939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:28,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307945624] [2021-08-21 12:30:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:28,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:28,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:28,045 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) [2021-08-21 12:30:28,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:30:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:28,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:30:28,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:28,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307945624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:28,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:28,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-08-21 12:30:28,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218227976] [2021-08-21 12:30:28,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:30:28,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:28,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:30:28,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:30:28,167 INFO L87 Difference]: Start difference. First operand 104 states and 223 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-08-21 12:30:28,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:28,255 INFO L93 Difference]: Finished difference Result 226 states and 505 transitions. [2021-08-21 12:30:28,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:30:28,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 21 [2021-08-21 12:30:28,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:28,256 INFO L225 Difference]: With dead ends: 226 [2021-08-21 12:30:28,256 INFO L226 Difference]: Without dead ends: 226 [2021-08-21 12:30:28,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:30:28,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-21 12:30:28,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 164. [2021-08-21 12:30:28,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2024539877300615) internal successors, (359), 163 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:28,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 359 transitions. [2021-08-21 12:30:28,261 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 359 transitions. Word has length 21 [2021-08-21 12:30:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:28,262 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 359 transitions. [2021-08-21 12:30:28,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-08-21 12:30:28,262 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 359 transitions. [2021-08-21 12:30:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:30:28,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:28,263 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:28,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:28,479 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,SelfDestructingSolverStorable5 [2021-08-21 12:30:28,479 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:28,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:28,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1098323698, now seen corresponding path program 2 times [2021-08-21 12:30:28,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:28,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617501444] [2021-08-21 12:30:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:28,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:28,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:28,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617501444] [2021-08-21 12:30:28,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617501444] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:30:28,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:30:28,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:30:28,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458004837] [2021-08-21 12:30:28,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:30:28,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:28,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:30:28,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:30:28,499 INFO L87 Difference]: Start difference. First operand 164 states and 359 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:28,507 INFO L93 Difference]: Finished difference Result 266 states and 560 transitions. [2021-08-21 12:30:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:30:28,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:30:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:28,509 INFO L225 Difference]: With dead ends: 266 [2021-08-21 12:30:28,509 INFO L226 Difference]: Without dead ends: 266 [2021-08-21 12:30:28,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:30:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-08-21 12:30:28,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2021-08-21 12:30:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.171673819742489) internal successors, (506), 233 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 506 transitions. [2021-08-21 12:30:28,515 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 506 transitions. Word has length 26 [2021-08-21 12:30:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:28,515 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 506 transitions. [2021-08-21 12:30:28,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:28,515 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 506 transitions. [2021-08-21 12:30:28,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:30:28,516 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:28,516 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:28,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-21 12:30:28,516 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:28,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1941099218, now seen corresponding path program 1 times [2021-08-21 12:30:28,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:28,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321795194] [2021-08-21 12:30:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:28,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:28,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:28,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321795194] [2021-08-21 12:30:28,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321795194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:28,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845293391] [2021-08-21 12:30:28,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:28,551 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:28,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:28,552 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) [2021-08-21 12:30:28,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:30:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:28,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:28,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:28,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845293391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:28,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:28,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 12:30:28,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382208229] [2021-08-21 12:30:28,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:28,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:28,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:28,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:28,695 INFO L87 Difference]: Start difference. First operand 234 states and 506 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:28,749 INFO L93 Difference]: Finished difference Result 562 states and 1200 transitions. [2021-08-21 12:30:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:30:28,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:30:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:28,752 INFO L225 Difference]: With dead ends: 562 [2021-08-21 12:30:28,752 INFO L226 Difference]: Without dead ends: 562 [2021-08-21 12:30:28,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-08-21 12:30:28,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 438. [2021-08-21 12:30:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.265446224256293) internal successors, (990), 437 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 990 transitions. [2021-08-21 12:30:28,762 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 990 transitions. Word has length 26 [2021-08-21 12:30:28,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:28,763 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 990 transitions. [2021-08-21 12:30:28,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 990 transitions. [2021-08-21 12:30:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:30:28,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:28,764 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:28,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:28,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:28,979 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:28,979 INFO L82 PathProgramCache]: Analyzing trace with hash -512335724, now seen corresponding path program 2 times [2021-08-21 12:30:28,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:28,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458527179] [2021-08-21 12:30:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:28,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:29,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:29,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458527179] [2021-08-21 12:30:29,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458527179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:29,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123634867] [2021-08-21 12:30:29,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:29,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:29,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:29,011 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) [2021-08-21 12:30:29,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:30:29,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:29,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:29,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:29,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123634867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:29,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:29,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 12:30:29,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346685371] [2021-08-21 12:30:29,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:30:29,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:29,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:30:29,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:29,159 INFO L87 Difference]: Start difference. First operand 438 states and 990 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:29,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:29,201 INFO L93 Difference]: Finished difference Result 491 states and 1077 transitions. [2021-08-21 12:30:29,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:30:29,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:30:29,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:29,203 INFO L225 Difference]: With dead ends: 491 [2021-08-21 12:30:29,203 INFO L226 Difference]: Without dead ends: 487 [2021-08-21 12:30:29,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:29,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-08-21 12:30:29,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 440. [2021-08-21 12:30:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.2574031890660593) internal successors, (991), 439 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 991 transitions. [2021-08-21 12:30:29,211 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 991 transitions. Word has length 26 [2021-08-21 12:30:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:29,211 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 991 transitions. [2021-08-21 12:30:29,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 991 transitions. [2021-08-21 12:30:29,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:30:29,212 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:29,212 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:29,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:29,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:29,431 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:29,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:29,432 INFO L82 PathProgramCache]: Analyzing trace with hash -206073602, now seen corresponding path program 3 times [2021-08-21 12:30:29,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:29,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291253181] [2021-08-21 12:30:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:29,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:29,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:29,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291253181] [2021-08-21 12:30:29,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291253181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:29,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261339827] [2021-08-21 12:30:29,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:29,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:29,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:29,493 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) [2021-08-21 12:30:29,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:30:29,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:30:29,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:29,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:29,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:29,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261339827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:29,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:29,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 12:30:29,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285626471] [2021-08-21 12:30:29,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:30:29,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:29,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:30:29,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:29,661 INFO L87 Difference]: Start difference. First operand 440 states and 991 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:29,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:29,701 INFO L93 Difference]: Finished difference Result 771 states and 1695 transitions. [2021-08-21 12:30:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:30:29,701 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:30:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:29,704 INFO L225 Difference]: With dead ends: 771 [2021-08-21 12:30:29,704 INFO L226 Difference]: Without dead ends: 771 [2021-08-21 12:30:29,704 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-08-21 12:30:29,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 634. [2021-08-21 12:30:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3175355450236967) internal successors, (1467), 633 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1467 transitions. [2021-08-21 12:30:29,715 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1467 transitions. Word has length 26 [2021-08-21 12:30:29,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:29,715 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1467 transitions. [2021-08-21 12:30:29,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1467 transitions. [2021-08-21 12:30:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:30:29,716 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:29,716 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:29,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:29,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-21 12:30:29,930 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:29,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:29,930 INFO L82 PathProgramCache]: Analyzing trace with hash 963982398, now seen corresponding path program 4 times [2021-08-21 12:30:29,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:29,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778838924] [2021-08-21 12:30:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:29,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:29,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:29,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778838924] [2021-08-21 12:30:29,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778838924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:29,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445025483] [2021-08-21 12:30:29,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:29,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:29,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:29,985 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) [2021-08-21 12:30:30,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:30:30,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:30,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:30,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:30,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445025483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:30,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:30,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 12:30:30,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983313027] [2021-08-21 12:30:30,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:30:30,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:30,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:30:30,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:30,182 INFO L87 Difference]: Start difference. First operand 634 states and 1467 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:30,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:30,223 INFO L93 Difference]: Finished difference Result 763 states and 1678 transitions. [2021-08-21 12:30:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:30:30,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:30:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:30,225 INFO L225 Difference]: With dead ends: 763 [2021-08-21 12:30:30,226 INFO L226 Difference]: Without dead ends: 759 [2021-08-21 12:30:30,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:30,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-08-21 12:30:30,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 634. [2021-08-21 12:30:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3143759873617693) internal successors, (1465), 633 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1465 transitions. [2021-08-21 12:30:30,236 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1465 transitions. Word has length 26 [2021-08-21 12:30:30,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:30,236 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 1465 transitions. [2021-08-21 12:30:30,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1465 transitions. [2021-08-21 12:30:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:30:30,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:30,238 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:30,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 12:30:30,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:30,453 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:30,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:30,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1572757468, now seen corresponding path program 5 times [2021-08-21 12:30:30,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:30,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418909794] [2021-08-21 12:30:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:30,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:30,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:30,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418909794] [2021-08-21 12:30:30,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418909794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:30,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799420856] [2021-08-21 12:30:30,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:30:30,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:30,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:30,484 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) [2021-08-21 12:30:30,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:30:30,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:30:30,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:30,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:30:30,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:30,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799420856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:30,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:30,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 12:30:30,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107548240] [2021-08-21 12:30:30,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:30,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:30,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:30,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:30,660 INFO L87 Difference]: Start difference. First operand 634 states and 1465 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:30,711 INFO L93 Difference]: Finished difference Result 741 states and 1639 transitions. [2021-08-21 12:30:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:30:30,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:30:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:30,714 INFO L225 Difference]: With dead ends: 741 [2021-08-21 12:30:30,714 INFO L226 Difference]: Without dead ends: 721 [2021-08-21 12:30:30,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-08-21 12:30:30,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 654. [2021-08-21 12:30:30,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.2833078101071975) internal successors, (1491), 653 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1491 transitions. [2021-08-21 12:30:30,724 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1491 transitions. Word has length 26 [2021-08-21 12:30:30,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:30,724 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 1491 transitions. [2021-08-21 12:30:30,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:30,724 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1491 transitions. [2021-08-21 12:30:30,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:30:30,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:30,725 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:30,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:30,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:30,942 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:30,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:30,943 INFO L82 PathProgramCache]: Analyzing trace with hash 139454239, now seen corresponding path program 6 times [2021-08-21 12:30:30,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:30,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141990821] [2021-08-21 12:30:30,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:30,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:30:30,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:30,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141990821] [2021-08-21 12:30:30,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141990821] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:30:30,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:30:30,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:30:30,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200802370] [2021-08-21 12:30:30,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:30:30,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:30:30,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:30:30,960 INFO L87 Difference]: Start difference. First operand 654 states and 1491 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:30,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:30,971 INFO L93 Difference]: Finished difference Result 1106 states and 2391 transitions. [2021-08-21 12:30:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:30:30,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:30:30,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:30,975 INFO L225 Difference]: With dead ends: 1106 [2021-08-21 12:30:30,975 INFO L226 Difference]: Without dead ends: 1106 [2021-08-21 12:30:30,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:30:30,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-08-21 12:30:30,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1035. [2021-08-21 12:30:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 2.2030947775628626) internal successors, (2278), 1034 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 2278 transitions. [2021-08-21 12:30:30,990 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 2278 transitions. Word has length 31 [2021-08-21 12:30:30,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:30,991 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 2278 transitions. [2021-08-21 12:30:30,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 2278 transitions. [2021-08-21 12:30:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:30:30,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:30,993 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:30,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-21 12:30:30,993 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:30,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:30,994 INFO L82 PathProgramCache]: Analyzing trace with hash 204098367, now seen corresponding path program 1 times [2021-08-21 12:30:30,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:30,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435611227] [2021-08-21 12:30:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:30,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:31,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:31,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435611227] [2021-08-21 12:30:31,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435611227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:31,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902880460] [2021-08-21 12:30:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:31,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:31,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:31,046 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) [2021-08-21 12:30:31,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:30:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:31,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:30:31,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:31,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902880460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:31,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:31,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 12:30:31,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050840952] [2021-08-21 12:30:31,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:30:31,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:31,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:30:31,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:31,398 INFO L87 Difference]: Start difference. First operand 1035 states and 2278 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:31,427 INFO L93 Difference]: Finished difference Result 1734 states and 3766 transitions. [2021-08-21 12:30:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:30:31,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:30:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:31,433 INFO L225 Difference]: With dead ends: 1734 [2021-08-21 12:30:31,433 INFO L226 Difference]: Without dead ends: 1715 [2021-08-21 12:30:31,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-08-21 12:30:31,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1571. [2021-08-21 12:30:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.212738853503185) internal successors, (3474), 1570 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3474 transitions. [2021-08-21 12:30:31,457 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3474 transitions. Word has length 31 [2021-08-21 12:30:31,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:31,457 INFO L470 AbstractCegarLoop]: Abstraction has 1571 states and 3474 transitions. [2021-08-21 12:30:31,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:31,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3474 transitions. [2021-08-21 12:30:31,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:30:31,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:31,460 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:31,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:31,665 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,SelfDestructingSolverStorable13 [2021-08-21 12:30:31,665 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash 938415871, now seen corresponding path program 2 times [2021-08-21 12:30:31,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:31,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091730875] [2021-08-21 12:30:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:31,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:31,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:31,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:31,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091730875] [2021-08-21 12:30:31,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091730875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:31,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062059570] [2021-08-21 12:30:31,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:31,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:31,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:31,725 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) [2021-08-21 12:30:31,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:30:31,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:31,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:31,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:30:31,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:32,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062059570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:32,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:32,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 12:30:32,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460893404] [2021-08-21 12:30:32,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:30:32,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:32,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:30:32,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:32,133 INFO L87 Difference]: Start difference. First operand 1571 states and 3474 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:32,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:32,174 INFO L93 Difference]: Finished difference Result 2696 states and 5884 transitions. [2021-08-21 12:30:32,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:30:32,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:30:32,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:32,182 INFO L225 Difference]: With dead ends: 2696 [2021-08-21 12:30:32,183 INFO L226 Difference]: Without dead ends: 2677 [2021-08-21 12:30:32,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:32,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-08-21 12:30:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2412. [2021-08-21 12:30:32,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.2310244711737868) internal successors, (5379), 2411 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:32,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 5379 transitions. [2021-08-21 12:30:32,220 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 5379 transitions. Word has length 31 [2021-08-21 12:30:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:32,220 INFO L470 AbstractCegarLoop]: Abstraction has 2412 states and 5379 transitions. [2021-08-21 12:30:32,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:32,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 5379 transitions. [2021-08-21 12:30:32,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:30:32,224 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:32,224 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:32,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:32,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:30:32,437 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:32,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:32,437 INFO L82 PathProgramCache]: Analyzing trace with hash 564205335, now seen corresponding path program 3 times [2021-08-21 12:30:32,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:32,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288943100] [2021-08-21 12:30:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:32,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:32,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:32,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:32,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288943100] [2021-08-21 12:30:32,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288943100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:32,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092759719] [2021-08-21 12:30:32,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:32,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:32,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:32,487 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) [2021-08-21 12:30:32,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:30:32,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:30:32,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:32,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:30:32,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:32,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092759719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:32,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:32,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 12:30:32,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201465905] [2021-08-21 12:30:32,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:32,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:32,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:32,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:32,809 INFO L87 Difference]: Start difference. First operand 2412 states and 5379 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:32,869 INFO L93 Difference]: Finished difference Result 4261 states and 9366 transitions. [2021-08-21 12:30:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:30:32,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:30:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:32,880 INFO L225 Difference]: With dead ends: 4261 [2021-08-21 12:30:32,880 INFO L226 Difference]: Without dead ends: 4236 [2021-08-21 12:30:32,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:32,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-08-21 12:30:32,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3410. [2021-08-21 12:30:32,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 2.24435318275154) internal successors, (7651), 3409 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 7651 transitions. [2021-08-21 12:30:32,933 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 7651 transitions. Word has length 31 [2021-08-21 12:30:32,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:32,933 INFO L470 AbstractCegarLoop]: Abstraction has 3410 states and 7651 transitions. [2021-08-21 12:30:32,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:32,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 7651 transitions. [2021-08-21 12:30:32,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:30:32,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:32,938 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:32,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:33,151 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,SelfDestructingSolverStorable15 [2021-08-21 12:30:33,151 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:33,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1752857303, now seen corresponding path program 4 times [2021-08-21 12:30:33,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:33,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160102102] [2021-08-21 12:30:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:33,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:33,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:33,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160102102] [2021-08-21 12:30:33,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160102102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:33,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275728039] [2021-08-21 12:30:33,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:33,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:33,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:33,213 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) [2021-08-21 12:30:33,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:30:33,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:33,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:33,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:30:33,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:33,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275728039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:33,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:33,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 12:30:33,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419993043] [2021-08-21 12:30:33,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:33,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:33,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:33,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:33,566 INFO L87 Difference]: Start difference. First operand 3410 states and 7651 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:33,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:33,619 INFO L93 Difference]: Finished difference Result 4354 states and 9576 transitions. [2021-08-21 12:30:33,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:30:33,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:30:33,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:33,631 INFO L225 Difference]: With dead ends: 4354 [2021-08-21 12:30:33,631 INFO L226 Difference]: Without dead ends: 4335 [2021-08-21 12:30:33,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-08-21 12:30:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3543. [2021-08-21 12:30:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 2.2478825522303785) internal successors, (7962), 3542 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:33,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 7962 transitions. [2021-08-21 12:30:33,687 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 7962 transitions. Word has length 31 [2021-08-21 12:30:33,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:33,688 INFO L470 AbstractCegarLoop]: Abstraction has 3543 states and 7962 transitions. [2021-08-21 12:30:33,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:33,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 7962 transitions. [2021-08-21 12:30:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:30:33,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:33,693 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:33,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:33,900 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,SelfDestructingSolverStorable16 [2021-08-21 12:30:33,901 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:33,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:33,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1753562787, now seen corresponding path program 5 times [2021-08-21 12:30:33,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:33,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277394411] [2021-08-21 12:30:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:33,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:33,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:33,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277394411] [2021-08-21 12:30:33,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277394411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:33,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002224166] [2021-08-21 12:30:33,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:30:33,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:33,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:33,973 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) [2021-08-21 12:30:34,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:30:34,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:30:34,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:34,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:30:34,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:30:34,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002224166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:34,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:34,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-21 12:30:34,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207612753] [2021-08-21 12:30:34,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:30:34,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:34,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:30:34,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:34,336 INFO L87 Difference]: Start difference. First operand 3543 states and 7962 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:34,378 INFO L93 Difference]: Finished difference Result 4170 states and 9274 transitions. [2021-08-21 12:30:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:30:34,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:30:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:34,392 INFO L225 Difference]: With dead ends: 4170 [2021-08-21 12:30:34,392 INFO L226 Difference]: Without dead ends: 4151 [2021-08-21 12:30:34,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:30:34,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-08-21 12:30:34,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3929. [2021-08-21 12:30:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 2.253818737270876) internal successors, (8853), 3928 states have internal predecessors, (8853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 8853 transitions. [2021-08-21 12:30:34,471 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 8853 transitions. Word has length 31 [2021-08-21 12:30:34,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:34,471 INFO L470 AbstractCegarLoop]: Abstraction has 3929 states and 8853 transitions. [2021-08-21 12:30:34,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:34,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 8853 transitions. [2021-08-21 12:30:34,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:30:34,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:34,478 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:34,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-21 12:30:34,701 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,SelfDestructingSolverStorable17 [2021-08-21 12:30:34,701 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:34,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:34,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1405888233, now seen corresponding path program 6 times [2021-08-21 12:30:34,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:34,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999590950] [2021-08-21 12:30:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:34,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:34,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:34,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999590950] [2021-08-21 12:30:34,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999590950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:34,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059109201] [2021-08-21 12:30:34,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:30:34,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:34,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:34,754 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) [2021-08-21 12:30:34,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:30:34,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:30:34,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:34,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:30:34,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:35,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059109201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:35,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:35,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 12:30:35,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944840888] [2021-08-21 12:30:35,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:35,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:35,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:35,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:35,129 INFO L87 Difference]: Start difference. First operand 3929 states and 8853 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:35,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:35,179 INFO L93 Difference]: Finished difference Result 5348 states and 11836 transitions. [2021-08-21 12:30:35,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:30:35,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:30:35,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:35,190 INFO L225 Difference]: With dead ends: 5348 [2021-08-21 12:30:35,190 INFO L226 Difference]: Without dead ends: 5329 [2021-08-21 12:30:35,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-08-21 12:30:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 4092. [2021-08-21 12:30:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4092 states, 4091 states have (on average 2.2561720850647764) internal successors, (9230), 4091 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 9230 transitions. [2021-08-21 12:30:35,281 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 9230 transitions. Word has length 31 [2021-08-21 12:30:35,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:35,281 INFO L470 AbstractCegarLoop]: Abstraction has 4092 states and 9230 transitions. [2021-08-21 12:30:35,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 9230 transitions. [2021-08-21 12:30:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 12:30:35,287 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:35,287 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:35,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:35,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:35,500 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:35,501 INFO L82 PathProgramCache]: Analyzing trace with hash -217236265, now seen corresponding path program 7 times [2021-08-21 12:30:35,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:35,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397774681] [2021-08-21 12:30:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:35,501 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:35,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:35,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397774681] [2021-08-21 12:30:35,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397774681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:35,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883479341] [2021-08-21 12:30:35,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:30:35,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:35,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:35,543 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) [2021-08-21 12:30:35,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:30:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:35,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:30:35,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:35,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883479341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:35,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:35,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 12:30:35,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252581667] [2021-08-21 12:30:35,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:35,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:35,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:35,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:35,923 INFO L87 Difference]: Start difference. First operand 4092 states and 9230 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:35,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:35,976 INFO L93 Difference]: Finished difference Result 5419 states and 11952 transitions. [2021-08-21 12:30:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:30:35,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 12:30:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:36,024 INFO L225 Difference]: With dead ends: 5419 [2021-08-21 12:30:36,024 INFO L226 Difference]: Without dead ends: 5400 [2021-08-21 12:30:36,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:36,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-08-21 12:30:36,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 2885. [2021-08-21 12:30:36,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2884 states have (on average 2.235090152565881) internal successors, (6446), 2884 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 6446 transitions. [2021-08-21 12:30:36,073 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 6446 transitions. Word has length 31 [2021-08-21 12:30:36,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:36,073 INFO L470 AbstractCegarLoop]: Abstraction has 2885 states and 6446 transitions. [2021-08-21 12:30:36,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:36,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 6446 transitions. [2021-08-21 12:30:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:36,077 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:36,077 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:36,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:36,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:36,293 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:36,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:36,293 INFO L82 PathProgramCache]: Analyzing trace with hash 580181725, now seen corresponding path program 8 times [2021-08-21 12:30:36,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:36,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374298840] [2021-08-21 12:30:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:36,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:36,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:36,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374298840] [2021-08-21 12:30:36,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374298840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:36,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429203633] [2021-08-21 12:30:36,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:36,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:36,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:36,346 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) [2021-08-21 12:30:36,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:30:36,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:36,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:36,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:30:36,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:36,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429203633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:36,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:36,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:30:36,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104809343] [2021-08-21 12:30:36,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:30:36,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:36,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:30:36,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:30:36,676 INFO L87 Difference]: Start difference. First operand 2885 states and 6446 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-08-21 12:30:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:36,791 INFO L93 Difference]: Finished difference Result 5635 states and 12327 transitions. [2021-08-21 12:30:36,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:36,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) Word has length 36 [2021-08-21 12:30:36,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:36,800 INFO L225 Difference]: With dead ends: 5635 [2021-08-21 12:30:36,800 INFO L226 Difference]: Without dead ends: 5635 [2021-08-21 12:30:36,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:30:36,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2021-08-21 12:30:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 3879. [2021-08-21 12:30:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3878 states have (on average 2.2439401753481176) internal successors, (8702), 3878 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 8702 transitions. [2021-08-21 12:30:36,849 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 8702 transitions. Word has length 36 [2021-08-21 12:30:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:36,849 INFO L470 AbstractCegarLoop]: Abstraction has 3879 states and 8702 transitions. [2021-08-21 12:30:36,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-08-21 12:30:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 8702 transitions. [2021-08-21 12:30:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:36,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:36,854 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:36,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:37,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:37,069 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:37,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1581012270, now seen corresponding path program 9 times [2021-08-21 12:30:37,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:37,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202540670] [2021-08-21 12:30:37,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:37,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:37,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:37,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202540670] [2021-08-21 12:30:37,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202540670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:37,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834466215] [2021-08-21 12:30:37,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:37,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:37,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:37,115 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) [2021-08-21 12:30:37,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:30:37,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:30:37,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:37,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:30:37,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:37,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834466215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:37,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:37,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:30:37,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451912518] [2021-08-21 12:30:37,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:30:37,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:37,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:30:37,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:30:37,475 INFO L87 Difference]: Start difference. First operand 3879 states and 8702 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-08-21 12:30:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:37,586 INFO L93 Difference]: Finished difference Result 7170 states and 15945 transitions. [2021-08-21 12:30:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:30:37,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) Word has length 36 [2021-08-21 12:30:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:37,597 INFO L225 Difference]: With dead ends: 7170 [2021-08-21 12:30:37,597 INFO L226 Difference]: Without dead ends: 7072 [2021-08-21 12:30:37,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:30:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7072 states. [2021-08-21 12:30:37,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7072 to 6656. [2021-08-21 12:30:37,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 2.251089406461307) internal successors, (14981), 6655 states have internal predecessors, (14981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 14981 transitions. [2021-08-21 12:30:37,699 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 14981 transitions. Word has length 36 [2021-08-21 12:30:37,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:37,699 INFO L470 AbstractCegarLoop]: Abstraction has 6656 states and 14981 transitions. [2021-08-21 12:30:37,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-08-21 12:30:37,699 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 14981 transitions. [2021-08-21 12:30:37,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:37,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:37,705 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:37,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:37,923 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,SelfDestructingSolverStorable21 [2021-08-21 12:30:37,923 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash -784153882, now seen corresponding path program 10 times [2021-08-21 12:30:37,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:37,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984042982] [2021-08-21 12:30:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:37,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:37,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:37,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984042982] [2021-08-21 12:30:37,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984042982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:37,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406842678] [2021-08-21 12:30:37,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:37,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:37,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:37,962 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) [2021-08-21 12:30:37,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:30:38,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:38,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:38,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:30:38,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:38,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406842678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:38,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:38,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 12:30:38,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488296070] [2021-08-21 12:30:38,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:38,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:38,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:38,345 INFO L87 Difference]: Start difference. First operand 6656 states and 14981 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:38,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:38,450 INFO L93 Difference]: Finished difference Result 6984 states and 15407 transitions. [2021-08-21 12:30:38,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:38,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) Word has length 36 [2021-08-21 12:30:38,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:38,491 INFO L225 Difference]: With dead ends: 6984 [2021-08-21 12:30:38,491 INFO L226 Difference]: Without dead ends: 6984 [2021-08-21 12:30:38,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6984 states. [2021-08-21 12:30:38,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6984 to 6596. [2021-08-21 12:30:38,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.234571645185747) internal successors, (14737), 6595 states have internal predecessors, (14737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 14737 transitions. [2021-08-21 12:30:38,692 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 14737 transitions. Word has length 36 [2021-08-21 12:30:38,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:38,692 INFO L470 AbstractCegarLoop]: Abstraction has 6596 states and 14737 transitions. [2021-08-21 12:30:38,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:38,692 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 14737 transitions. [2021-08-21 12:30:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:38,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:38,699 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:38,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:38,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:38,900 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:38,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:38,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1547340963, now seen corresponding path program 11 times [2021-08-21 12:30:38,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:38,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780461142] [2021-08-21 12:30:38,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:38,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:38,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:38,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780461142] [2021-08-21 12:30:38,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780461142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:38,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444862242] [2021-08-21 12:30:38,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:30:38,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:38,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:38,941 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) [2021-08-21 12:30:38,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:30:39,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:30:39,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:39,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:30:39,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:39,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444862242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:39,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:39,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 12:30:39,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826005473] [2021-08-21 12:30:39,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:39,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:39,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:39,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:39,307 INFO L87 Difference]: Start difference. First operand 6596 states and 14737 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:39,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:39,415 INFO L93 Difference]: Finished difference Result 7018 states and 15447 transitions. [2021-08-21 12:30:39,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:39,427 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) Word has length 36 [2021-08-21 12:30:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:39,436 INFO L225 Difference]: With dead ends: 7018 [2021-08-21 12:30:39,436 INFO L226 Difference]: Without dead ends: 7014 [2021-08-21 12:30:39,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:39,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2021-08-21 12:30:39,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6152. [2021-08-21 12:30:39,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 2.238497805234921) internal successors, (13769), 6151 states have internal predecessors, (13769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:39,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 13769 transitions. [2021-08-21 12:30:39,605 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 13769 transitions. Word has length 36 [2021-08-21 12:30:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:39,605 INFO L470 AbstractCegarLoop]: Abstraction has 6152 states and 13769 transitions. [2021-08-21 12:30:39,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 13769 transitions. [2021-08-21 12:30:39,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:39,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:39,612 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:39,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:39,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:39,825 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:39,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:39,825 INFO L82 PathProgramCache]: Analyzing trace with hash -429715939, now seen corresponding path program 12 times [2021-08-21 12:30:39,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:39,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452858332] [2021-08-21 12:30:39,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:39,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:39,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:39,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452858332] [2021-08-21 12:30:39,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452858332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:39,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944361424] [2021-08-21 12:30:39,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:30:39,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:39,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:39,871 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) [2021-08-21 12:30:39,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:30:40,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:30:40,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:40,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:30:40,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:40,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944361424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:40,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:40,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 12:30:40,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630941979] [2021-08-21 12:30:40,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:40,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:40,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:40,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:40,299 INFO L87 Difference]: Start difference. First operand 6152 states and 13769 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:40,412 INFO L93 Difference]: Finished difference Result 9612 states and 21128 transitions. [2021-08-21 12:30:40,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:40,412 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) Word has length 36 [2021-08-21 12:30:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:40,425 INFO L225 Difference]: With dead ends: 9612 [2021-08-21 12:30:40,425 INFO L226 Difference]: Without dead ends: 9612 [2021-08-21 12:30:40,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2021-08-21 12:30:40,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 8560. [2021-08-21 12:30:40,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8560 states, 8559 states have (on average 2.2475756513611405) internal successors, (19237), 8559 states have internal predecessors, (19237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 19237 transitions. [2021-08-21 12:30:40,571 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 19237 transitions. Word has length 36 [2021-08-21 12:30:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:40,572 INFO L470 AbstractCegarLoop]: Abstraction has 8560 states and 19237 transitions. [2021-08-21 12:30:40,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 19237 transitions. [2021-08-21 12:30:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:40,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:40,581 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:40,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:40,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:40,795 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:40,795 INFO L82 PathProgramCache]: Analyzing trace with hash 565238930, now seen corresponding path program 13 times [2021-08-21 12:30:40,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:40,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640474025] [2021-08-21 12:30:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:40,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:40,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:40,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640474025] [2021-08-21 12:30:40,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640474025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:40,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040677558] [2021-08-21 12:30:40,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:30:40,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:40,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:40,844 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) [2021-08-21 12:30:40,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:30:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:41,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:30:41,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:41,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040677558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:41,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:41,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 12:30:41,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548206310] [2021-08-21 12:30:41,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:41,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:41,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:41,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:41,285 INFO L87 Difference]: Start difference. First operand 8560 states and 19237 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:41,388 INFO L93 Difference]: Finished difference Result 10199 states and 22770 transitions. [2021-08-21 12:30:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:41,388 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) Word has length 36 [2021-08-21 12:30:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:41,406 INFO L225 Difference]: With dead ends: 10199 [2021-08-21 12:30:41,406 INFO L226 Difference]: Without dead ends: 10193 [2021-08-21 12:30:41,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:41,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10193 states. [2021-08-21 12:30:41,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10193 to 9772. [2021-08-21 12:30:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 9771 states have (on average 2.2569849554805037) internal successors, (22053), 9771 states have internal predecessors, (22053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 22053 transitions. [2021-08-21 12:30:41,568 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 22053 transitions. Word has length 36 [2021-08-21 12:30:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:41,568 INFO L470 AbstractCegarLoop]: Abstraction has 9772 states and 22053 transitions. [2021-08-21 12:30:41,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 22053 transitions. [2021-08-21 12:30:41,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:41,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:41,578 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:41,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:41,792 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,SelfDestructingSolverStorable25 [2021-08-21 12:30:41,793 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1839626470, now seen corresponding path program 14 times [2021-08-21 12:30:41,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:41,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201743589] [2021-08-21 12:30:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:41,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:41,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:41,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201743589] [2021-08-21 12:30:41,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201743589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:41,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379922150] [2021-08-21 12:30:41,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:41,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:41,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:41,841 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) [2021-08-21 12:30:41,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:30:42,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:42,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:42,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:30:42,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:42,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379922150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:42,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:42,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 12:30:42,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95927263] [2021-08-21 12:30:42,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:42,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:42,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:42,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:42,289 INFO L87 Difference]: Start difference. First operand 9772 states and 22053 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:42,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:42,364 INFO L93 Difference]: Finished difference Result 10439 states and 23230 transitions. [2021-08-21 12:30:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:42,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) Word has length 36 [2021-08-21 12:30:42,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:42,378 INFO L225 Difference]: With dead ends: 10439 [2021-08-21 12:30:42,378 INFO L226 Difference]: Without dead ends: 10437 [2021-08-21 12:30:42,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:42,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10437 states. [2021-08-21 12:30:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10437 to 9840. [2021-08-21 12:30:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 2.252363045024901) internal successors, (22161), 9839 states have internal predecessors, (22161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 22161 transitions. [2021-08-21 12:30:42,524 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 22161 transitions. Word has length 36 [2021-08-21 12:30:42,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:42,524 INFO L470 AbstractCegarLoop]: Abstraction has 9840 states and 22161 transitions. [2021-08-21 12:30:42,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:42,524 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 22161 transitions. [2021-08-21 12:30:42,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:42,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:42,532 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:42,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:42,748 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,SelfDestructingSolverStorable26 [2021-08-21 12:30:42,749 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:42,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:42,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1076439389, now seen corresponding path program 15 times [2021-08-21 12:30:42,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:42,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667898522] [2021-08-21 12:30:42,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:42,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:42,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:42,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667898522] [2021-08-21 12:30:42,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667898522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:42,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969054379] [2021-08-21 12:30:42,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:42,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:42,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:42,781 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) [2021-08-21 12:30:42,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:30:43,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:30:43,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:43,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:30:43,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:30:43,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969054379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:43,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:43,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-21 12:30:43,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074035871] [2021-08-21 12:30:43,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:30:43,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:43,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:30:43,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:30:43,354 INFO L87 Difference]: Start difference. First operand 9840 states and 22161 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:43,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:43,687 INFO L93 Difference]: Finished difference Result 16933 states and 36602 transitions. [2021-08-21 12:30:43,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 12:30:43,688 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 12:30:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:43,712 INFO L225 Difference]: With dead ends: 16933 [2021-08-21 12:30:43,712 INFO L226 Difference]: Without dead ends: 16887 [2021-08-21 12:30:43,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:30:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16887 states. [2021-08-21 12:30:43,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16887 to 11694. [2021-08-21 12:30:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11694 states, 11693 states have (on average 2.213033438809544) internal successors, (25877), 11693 states have internal predecessors, (25877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11694 states to 11694 states and 25877 transitions. [2021-08-21 12:30:43,946 INFO L78 Accepts]: Start accepts. Automaton has 11694 states and 25877 transitions. Word has length 36 [2021-08-21 12:30:43,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:43,946 INFO L470 AbstractCegarLoop]: Abstraction has 11694 states and 25877 transitions. [2021-08-21 12:30:43,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:43,946 INFO L276 IsEmpty]: Start isEmpty. Operand 11694 states and 25877 transitions. [2021-08-21 12:30:43,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:43,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:43,956 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:44,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:44,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 12:30:44,174 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:44,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:44,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1260168476, now seen corresponding path program 16 times [2021-08-21 12:30:44,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:44,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24179793] [2021-08-21 12:30:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:44,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:44,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:44,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24179793] [2021-08-21 12:30:44,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24179793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:44,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334694840] [2021-08-21 12:30:44,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:44,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:44,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:44,210 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) [2021-08-21 12:30:44,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:30:44,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:44,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:44,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:30:44,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:44,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334694840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:44,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:44,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:30:44,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047578539] [2021-08-21 12:30:44,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:44,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:44,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:44,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:44,647 INFO L87 Difference]: Start difference. First operand 11694 states and 25877 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-08-21 12:30:44,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:44,781 INFO L93 Difference]: Finished difference Result 12577 states and 27332 transitions. [2021-08-21 12:30:44,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:44,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) Word has length 36 [2021-08-21 12:30:44,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:44,797 INFO L225 Difference]: With dead ends: 12577 [2021-08-21 12:30:44,797 INFO L226 Difference]: Without dead ends: 12575 [2021-08-21 12:30:44,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:30:44,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-08-21 12:30:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 11238. [2021-08-21 12:30:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11238 states, 11237 states have (on average 2.20352407226128) internal successors, (24761), 11237 states have internal predecessors, (24761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 24761 transitions. [2021-08-21 12:30:45,093 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 24761 transitions. Word has length 36 [2021-08-21 12:30:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:45,093 INFO L470 AbstractCegarLoop]: Abstraction has 11238 states and 24761 transitions. [2021-08-21 12:30:45,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-08-21 12:30:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 24761 transitions. [2021-08-21 12:30:45,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:45,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:45,100 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:45,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:45,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:45,317 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:45,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1086431742, now seen corresponding path program 17 times [2021-08-21 12:30:45,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:45,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611241154] [2021-08-21 12:30:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:45,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:30:45,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:45,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611241154] [2021-08-21 12:30:45,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611241154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:45,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522507103] [2021-08-21 12:30:45,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:30:45,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:45,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:45,376 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) [2021-08-21 12:30:45,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:30:45,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:30:45,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:45,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:30:45,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:30:45,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522507103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:45,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:45,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:30:45,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759702527] [2021-08-21 12:30:45,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:45,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:45,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:45,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:45,842 INFO L87 Difference]: Start difference. First operand 11238 states and 24761 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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) [2021-08-21 12:30:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:45,956 INFO L93 Difference]: Finished difference Result 11745 states and 25558 transitions. [2021-08-21 12:30:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:30:45,956 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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 36 [2021-08-21 12:30:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:45,971 INFO L225 Difference]: With dead ends: 11745 [2021-08-21 12:30:45,971 INFO L226 Difference]: Without dead ends: 11709 [2021-08-21 12:30:45,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:30:45,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2021-08-21 12:30:46,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11232. [2021-08-21 12:30:46,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 2.19740005342356) internal successors, (24679), 11231 states have internal predecessors, (24679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 24679 transitions. [2021-08-21 12:30:46,107 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 24679 transitions. Word has length 36 [2021-08-21 12:30:46,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:46,107 INFO L470 AbstractCegarLoop]: Abstraction has 11232 states and 24679 transitions. [2021-08-21 12:30:46,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 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) [2021-08-21 12:30:46,107 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 24679 transitions. [2021-08-21 12:30:46,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:46,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:46,113 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:46,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:46,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:46,329 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:46,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:46,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212014, now seen corresponding path program 18 times [2021-08-21 12:30:46,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:46,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635627130] [2021-08-21 12:30:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:46,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:46,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:46,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635627130] [2021-08-21 12:30:46,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635627130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:46,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877311251] [2021-08-21 12:30:46,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:30:46,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:46,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:46,368 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) [2021-08-21 12:30:46,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:30:46,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:30:46,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:46,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:30:46,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:46,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877311251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:46,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:46,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 12:30:46,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139363315] [2021-08-21 12:30:46,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:46,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:46,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:46,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:46,859 INFO L87 Difference]: Start difference. First operand 11232 states and 24679 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:46,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:46,946 INFO L93 Difference]: Finished difference Result 13428 states and 29318 transitions. [2021-08-21 12:30:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) Word has length 36 [2021-08-21 12:30:46,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:46,964 INFO L225 Difference]: With dead ends: 13428 [2021-08-21 12:30:46,965 INFO L226 Difference]: Without dead ends: 13422 [2021-08-21 12:30:46,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:46,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13422 states. [2021-08-21 12:30:47,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13422 to 12944. [2021-08-21 12:30:47,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12944 states, 12943 states have (on average 2.2074480414123463) internal successors, (28571), 12943 states have internal predecessors, (28571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12944 states to 12944 states and 28571 transitions. [2021-08-21 12:30:47,166 INFO L78 Accepts]: Start accepts. Automaton has 12944 states and 28571 transitions. Word has length 36 [2021-08-21 12:30:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:47,166 INFO L470 AbstractCegarLoop]: Abstraction has 12944 states and 28571 transitions. [2021-08-21 12:30:47,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 12944 states and 28571 transitions. [2021-08-21 12:30:47,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:47,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:47,173 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:47,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:47,391 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,SelfDestructingSolverStorable30 [2021-08-21 12:30:47,391 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:47,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:47,391 INFO L82 PathProgramCache]: Analyzing trace with hash -222824474, now seen corresponding path program 19 times [2021-08-21 12:30:47,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:47,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805719310] [2021-08-21 12:30:47,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:47,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:47,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:47,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805719310] [2021-08-21 12:30:47,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805719310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:47,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153593844] [2021-08-21 12:30:47,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:30:47,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:47,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:47,426 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) [2021-08-21 12:30:47,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:30:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:47,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:30:47,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:47,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153593844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:47,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:47,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-21 12:30:47,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185263031] [2021-08-21 12:30:47,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:30:47,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:47,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:30:47,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:30:47,899 INFO L87 Difference]: Start difference. First operand 12944 states and 28571 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:47,986 INFO L93 Difference]: Finished difference Result 13864 states and 30236 transitions. [2021-08-21 12:30:47,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:47,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) Word has length 36 [2021-08-21 12:30:47,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:48,008 INFO L225 Difference]: With dead ends: 13864 [2021-08-21 12:30:48,008 INFO L226 Difference]: Without dead ends: 13864 [2021-08-21 12:30:48,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:30:48,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2021-08-21 12:30:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 12976. [2021-08-21 12:30:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12976 states, 12975 states have (on average 2.206936416184971) internal successors, (28635), 12975 states have internal predecessors, (28635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12976 states to 12976 states and 28635 transitions. [2021-08-21 12:30:48,180 INFO L78 Accepts]: Start accepts. Automaton has 12976 states and 28635 transitions. Word has length 36 [2021-08-21 12:30:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:48,180 INFO L470 AbstractCegarLoop]: Abstraction has 12976 states and 28635 transitions. [2021-08-21 12:30:48,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-08-21 12:30:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 12976 states and 28635 transitions. [2021-08-21 12:30:48,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:48,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:48,187 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:48,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 12:30:48,403 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,SelfDestructingSolverStorable31 [2021-08-21 12:30:48,403 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:48,404 INFO L82 PathProgramCache]: Analyzing trace with hash -802282468, now seen corresponding path program 20 times [2021-08-21 12:30:48,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:48,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872615971] [2021-08-21 12:30:48,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:48,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:48,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:48,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872615971] [2021-08-21 12:30:48,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872615971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:48,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222977278] [2021-08-21 12:30:48,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:48,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:48,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:48,438 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) [2021-08-21 12:30:48,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:30:48,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:48,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:48,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:30:48,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:48,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222977278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:48,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:48,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:30:48,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119239615] [2021-08-21 12:30:48,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:48,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:48,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:48,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:48,908 INFO L87 Difference]: Start difference. First operand 12976 states and 28635 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-08-21 12:30:49,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:49,013 INFO L93 Difference]: Finished difference Result 14564 states and 31706 transitions. [2021-08-21 12:30:49,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:30:49,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) Word has length 36 [2021-08-21 12:30:49,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:49,035 INFO L225 Difference]: With dead ends: 14564 [2021-08-21 12:30:49,035 INFO L226 Difference]: Without dead ends: 14564 [2021-08-21 12:30:49,035 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:30:49,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14564 states. [2021-08-21 12:30:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14564 to 13136. [2021-08-21 12:30:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13136 states, 13135 states have (on average 2.204415683288923) internal successors, (28955), 13135 states have internal predecessors, (28955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13136 states to 13136 states and 28955 transitions. [2021-08-21 12:30:49,248 INFO L78 Accepts]: Start accepts. Automaton has 13136 states and 28955 transitions. Word has length 36 [2021-08-21 12:30:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:49,248 INFO L470 AbstractCegarLoop]: Abstraction has 13136 states and 28955 transitions. [2021-08-21 12:30:49,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 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) [2021-08-21 12:30:49,248 INFO L276 IsEmpty]: Start isEmpty. Operand 13136 states and 28955 transitions. [2021-08-21 12:30:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 12:30:49,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:49,254 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:49,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:49,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:49,471 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:49,472 INFO L82 PathProgramCache]: Analyzing trace with hash 650582462, now seen corresponding path program 21 times [2021-08-21 12:30:49,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:49,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396837317] [2021-08-21 12:30:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:49,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:49,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:49,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396837317] [2021-08-21 12:30:49,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396837317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:49,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300826967] [2021-08-21 12:30:49,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:49,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:49,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:49,521 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) [2021-08-21 12:30:49,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:30:49,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:30:49,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:49,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 12:30:49,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:50,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300826967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:50,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:50,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:30:50,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157749975] [2021-08-21 12:30:50,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:30:50,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:50,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:30:50,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:30:50,033 INFO L87 Difference]: Start difference. First operand 13136 states and 28955 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-08-21 12:30:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:50,145 INFO L93 Difference]: Finished difference Result 14130 states and 30823 transitions. [2021-08-21 12:30:50,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:50,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) Word has length 36 [2021-08-21 12:30:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:50,165 INFO L225 Difference]: With dead ends: 14130 [2021-08-21 12:30:50,166 INFO L226 Difference]: Without dead ends: 14130 [2021-08-21 12:30:50,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:30:50,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14130 states. [2021-08-21 12:30:50,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14130 to 12516. [2021-08-21 12:30:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12516 states, 12515 states have (on average 2.204314822213344) internal successors, (27587), 12515 states have internal predecessors, (27587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12516 states to 12516 states and 27587 transitions. [2021-08-21 12:30:50,389 INFO L78 Accepts]: Start accepts. Automaton has 12516 states and 27587 transitions. Word has length 36 [2021-08-21 12:30:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:50,389 INFO L470 AbstractCegarLoop]: Abstraction has 12516 states and 27587 transitions. [2021-08-21 12:30:50,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-08-21 12:30:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 12516 states and 27587 transitions. [2021-08-21 12:30:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:30:50,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:50,401 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:50,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:50,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:50,619 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:50,619 INFO L82 PathProgramCache]: Analyzing trace with hash -260426766, now seen corresponding path program 22 times [2021-08-21 12:30:50,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:50,619 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504424264] [2021-08-21 12:30:50,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:50,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:50,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:50,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504424264] [2021-08-21 12:30:50,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504424264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:50,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233321439] [2021-08-21 12:30:50,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:50,679 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:50,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:50,679 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) [2021-08-21 12:30:50,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:30:51,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:51,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:30:51,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:51,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233321439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:51,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:51,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:30:51,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169622244] [2021-08-21 12:30:51,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:30:51,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:51,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:30:51,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:30:51,257 INFO L87 Difference]: Start difference. First operand 12516 states and 27587 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:51,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:51,413 INFO L93 Difference]: Finished difference Result 15926 states and 34731 transitions. [2021-08-21 12:30:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:30:51,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:30:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:51,436 INFO L225 Difference]: With dead ends: 15926 [2021-08-21 12:30:51,436 INFO L226 Difference]: Without dead ends: 15926 [2021-08-21 12:30:51,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:30:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15926 states. [2021-08-21 12:30:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15926 to 13120. [2021-08-21 12:30:51,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13120 states, 13119 states have (on average 2.2095434103209084) internal successors, (28987), 13119 states have internal predecessors, (28987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13120 states to 13120 states and 28987 transitions. [2021-08-21 12:30:51,632 INFO L78 Accepts]: Start accepts. Automaton has 13120 states and 28987 transitions. Word has length 46 [2021-08-21 12:30:51,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:51,632 INFO L470 AbstractCegarLoop]: Abstraction has 13120 states and 28987 transitions. [2021-08-21 12:30:51,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:51,633 INFO L276 IsEmpty]: Start isEmpty. Operand 13120 states and 28987 transitions. [2021-08-21 12:30:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:30:51,646 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:51,647 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:51,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:51,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:51,863 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:51,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:51,864 INFO L82 PathProgramCache]: Analyzing trace with hash 666790004, now seen corresponding path program 23 times [2021-08-21 12:30:51,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:51,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206937349] [2021-08-21 12:30:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:51,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:51,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:51,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206937349] [2021-08-21 12:30:51,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206937349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:51,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539552929] [2021-08-21 12:30:51,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:30:51,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:51,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:51,900 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) [2021-08-21 12:30:51,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:30:52,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:30:52,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:52,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:30:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:52,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539552929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:52,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:52,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:30:52,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282580631] [2021-08-21 12:30:52,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:52,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:52,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:52,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:52,424 INFO L87 Difference]: Start difference. First operand 13120 states and 28987 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:52,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:52,527 INFO L93 Difference]: Finished difference Result 13630 states and 29839 transitions. [2021-08-21 12:30:52,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:30:52,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:30:52,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:52,546 INFO L225 Difference]: With dead ends: 13630 [2021-08-21 12:30:52,547 INFO L226 Difference]: Without dead ends: 13622 [2021-08-21 12:30:52,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:30:52,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-08-21 12:30:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 13056. [2021-08-21 12:30:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13056 states, 13055 states have (on average 2.2050555342780545) internal successors, (28787), 13055 states have internal predecessors, (28787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13056 states to 13056 states and 28787 transitions. [2021-08-21 12:30:52,818 INFO L78 Accepts]: Start accepts. Automaton has 13056 states and 28787 transitions. Word has length 46 [2021-08-21 12:30:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:52,818 INFO L470 AbstractCegarLoop]: Abstraction has 13056 states and 28787 transitions. [2021-08-21 12:30:52,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 13056 states and 28787 transitions. [2021-08-21 12:30:52,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:30:52,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:52,831 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:52,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:53,048 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,SelfDestructingSolverStorable35 [2021-08-21 12:30:53,048 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:53,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1971167966, now seen corresponding path program 24 times [2021-08-21 12:30:53,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:53,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479352694] [2021-08-21 12:30:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:53,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:53,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:53,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479352694] [2021-08-21 12:30:53,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479352694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:53,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892038923] [2021-08-21 12:30:53,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:30:53,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:53,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:53,090 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) [2021-08-21 12:30:53,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 12:30:53,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:30:53,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:53,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:30:53,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:53,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892038923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:53,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:53,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:30:53,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304196332] [2021-08-21 12:30:53,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:53,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:53,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:53,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:53,650 INFO L87 Difference]: Start difference. First operand 13056 states and 28787 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:53,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:53,752 INFO L93 Difference]: Finished difference Result 17393 states and 37929 transitions. [2021-08-21 12:30:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:30:53,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:30:53,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:53,774 INFO L225 Difference]: With dead ends: 17393 [2021-08-21 12:30:53,775 INFO L226 Difference]: Without dead ends: 17393 [2021-08-21 12:30:53,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:30:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17393 states. [2021-08-21 12:30:53,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17393 to 15686. [2021-08-21 12:30:53,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15686 states, 15685 states have (on average 2.224099458080969) internal successors, (34885), 15685 states have internal predecessors, (34885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:53,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15686 states to 15686 states and 34885 transitions. [2021-08-21 12:30:53,959 INFO L78 Accepts]: Start accepts. Automaton has 15686 states and 34885 transitions. Word has length 46 [2021-08-21 12:30:53,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:53,959 INFO L470 AbstractCegarLoop]: Abstraction has 15686 states and 34885 transitions. [2021-08-21 12:30:53,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:53,959 INFO L276 IsEmpty]: Start isEmpty. Operand 15686 states and 34885 transitions. [2021-08-21 12:30:53,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:30:53,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:53,971 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:53,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:54,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 12:30:54,188 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:54,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1153743330, now seen corresponding path program 25 times [2021-08-21 12:30:54,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:54,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531256201] [2021-08-21 12:30:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:54,188 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:54,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:54,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531256201] [2021-08-21 12:30:54,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531256201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:54,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130203293] [2021-08-21 12:30:54,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:30:54,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:54,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:54,227 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) [2021-08-21 12:30:54,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 12:30:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:54,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:30:54,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:54,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130203293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:54,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:54,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:30:54,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374895876] [2021-08-21 12:30:54,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:54,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:54,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:54,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:54,862 INFO L87 Difference]: Start difference. First operand 15686 states and 34885 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:54,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:54,973 INFO L93 Difference]: Finished difference Result 16911 states and 36914 transitions. [2021-08-21 12:30:54,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:30:54,974 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:30:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:54,998 INFO L225 Difference]: With dead ends: 16911 [2021-08-21 12:30:54,999 INFO L226 Difference]: Without dead ends: 16863 [2021-08-21 12:30:54,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:30:55,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16863 states. [2021-08-21 12:30:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16863 to 14310. [2021-08-21 12:30:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14310 states, 14309 states have (on average 2.212104270039835) internal successors, (31653), 14309 states have internal predecessors, (31653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:55,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14310 states to 14310 states and 31653 transitions. [2021-08-21 12:30:55,181 INFO L78 Accepts]: Start accepts. Automaton has 14310 states and 31653 transitions. Word has length 46 [2021-08-21 12:30:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:55,181 INFO L470 AbstractCegarLoop]: Abstraction has 14310 states and 31653 transitions. [2021-08-21 12:30:55,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 14310 states and 31653 transitions. [2021-08-21 12:30:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:30:55,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:55,192 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:55,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:55,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 12:30:55,410 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:55,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:55,410 INFO L82 PathProgramCache]: Analyzing trace with hash 604484100, now seen corresponding path program 26 times [2021-08-21 12:30:55,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:55,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334879682] [2021-08-21 12:30:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:55,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:55,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:55,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334879682] [2021-08-21 12:30:55,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334879682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:55,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143279185] [2021-08-21 12:30:55,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:30:55,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:55,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:55,453 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) [2021-08-21 12:30:55,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 12:30:55,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:30:55,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:55,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:30:55,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:30:56,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143279185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:56,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:56,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:30:56,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733592450] [2021-08-21 12:30:56,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:30:56,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:56,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:30:56,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:30:56,019 INFO L87 Difference]: Start difference. First operand 14310 states and 31653 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:56,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:56,145 INFO L93 Difference]: Finished difference Result 15209 states and 33173 transitions. [2021-08-21 12:30:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:30:56,145 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:30:56,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:56,164 INFO L225 Difference]: With dead ends: 15209 [2021-08-21 12:30:56,164 INFO L226 Difference]: Without dead ends: 15137 [2021-08-21 12:30:56,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:30:56,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15137 states. [2021-08-21 12:30:56,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15137 to 14314. [2021-08-21 12:30:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14314 states, 14313 states have (on average 2.2051980716830855) internal successors, (31563), 14313 states have internal predecessors, (31563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14314 states to 14314 states and 31563 transitions. [2021-08-21 12:30:56,337 INFO L78 Accepts]: Start accepts. Automaton has 14314 states and 31563 transitions. Word has length 46 [2021-08-21 12:30:56,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:56,337 INFO L470 AbstractCegarLoop]: Abstraction has 14314 states and 31563 transitions. [2021-08-21 12:30:56,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:56,337 INFO L276 IsEmpty]: Start isEmpty. Operand 14314 states and 31563 transitions. [2021-08-21 12:30:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:30:56,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:56,348 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:56,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:56,565 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,SelfDestructingSolverStorable38 [2021-08-21 12:30:56,566 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:56,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:56,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1267130958, now seen corresponding path program 27 times [2021-08-21 12:30:56,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:56,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722887534] [2021-08-21 12:30:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:56,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:56,665 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:30:56,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:56,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722887534] [2021-08-21 12:30:56,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722887534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:56,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602437421] [2021-08-21 12:30:56,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:30:56,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:56,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:56,667 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) [2021-08-21 12:30:56,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 12:30:57,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:30:57,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:30:57,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:57,269 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:30:57,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602437421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:57,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:57,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:30:57,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021975150] [2021-08-21 12:30:57,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:57,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:57,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:57,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:57,270 INFO L87 Difference]: Start difference. First operand 14314 states and 31563 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2021-08-21 12:30:57,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:57,373 INFO L93 Difference]: Finished difference Result 18333 states and 40131 transitions. [2021-08-21 12:30:57,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:30:57,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 46 [2021-08-21 12:30:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:57,400 INFO L225 Difference]: With dead ends: 18333 [2021-08-21 12:30:57,400 INFO L226 Difference]: Without dead ends: 18330 [2021-08-21 12:30:57,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:30:57,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18330 states. [2021-08-21 12:30:57,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18330 to 15498. [2021-08-21 12:30:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15498 states, 15497 states have (on average 2.2112021681615794) internal successors, (34267), 15497 states have internal predecessors, (34267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15498 states to 15498 states and 34267 transitions. [2021-08-21 12:30:57,600 INFO L78 Accepts]: Start accepts. Automaton has 15498 states and 34267 transitions. Word has length 46 [2021-08-21 12:30:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:57,601 INFO L470 AbstractCegarLoop]: Abstraction has 15498 states and 34267 transitions. [2021-08-21 12:30:57,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2021-08-21 12:30:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 15498 states and 34267 transitions. [2021-08-21 12:30:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:30:57,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:57,613 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:57,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:57,829 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,SelfDestructingSolverStorable39 [2021-08-21 12:30:57,830 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:57,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:57,830 INFO L82 PathProgramCache]: Analyzing trace with hash -980807748, now seen corresponding path program 28 times [2021-08-21 12:30:57,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:57,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519103350] [2021-08-21 12:30:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:57,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:57,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:57,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519103350] [2021-08-21 12:30:57,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519103350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:57,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349181079] [2021-08-21 12:30:57,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:30:57,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:57,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:57,864 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) [2021-08-21 12:30:57,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 12:30:58,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:30:58,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:58,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:30:58,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:58,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349181079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:58,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:58,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:30:58,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538058733] [2021-08-21 12:30:58,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:58,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:58,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:58,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:58,472 INFO L87 Difference]: Start difference. First operand 15498 states and 34267 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:30:58,585 INFO L93 Difference]: Finished difference Result 20808 states and 45501 transitions. [2021-08-21 12:30:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:30:58,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:30:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:30:58,673 INFO L225 Difference]: With dead ends: 20808 [2021-08-21 12:30:58,673 INFO L226 Difference]: Without dead ends: 20808 [2021-08-21 12:30:58,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:30:58,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20808 states. [2021-08-21 12:30:58,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20808 to 19050. [2021-08-21 12:30:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19050 states, 19049 states have (on average 2.2252611685652792) internal successors, (42389), 19049 states have internal predecessors, (42389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19050 states to 19050 states and 42389 transitions. [2021-08-21 12:30:58,940 INFO L78 Accepts]: Start accepts. Automaton has 19050 states and 42389 transitions. Word has length 46 [2021-08-21 12:30:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:30:58,940 INFO L470 AbstractCegarLoop]: Abstraction has 19050 states and 42389 transitions. [2021-08-21 12:30:58,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:30:58,941 INFO L276 IsEmpty]: Start isEmpty. Operand 19050 states and 42389 transitions. [2021-08-21 12:30:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:30:58,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:30:58,956 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:30:58,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 12:30:59,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:59,174 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:30:59,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:30:59,175 INFO L82 PathProgramCache]: Analyzing trace with hash 189248252, now seen corresponding path program 29 times [2021-08-21 12:30:59,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:30:59,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224748189] [2021-08-21 12:30:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:30:59,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:30:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:30:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:59,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:30:59,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224748189] [2021-08-21 12:30:59,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224748189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:59,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127884735] [2021-08-21 12:30:59,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:30:59,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:30:59,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:30:59,213 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) [2021-08-21 12:30:59,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 12:30:59,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:30:59,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:30:59,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:30:59,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:30:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:30:59,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127884735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:30:59,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:30:59,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:30:59,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803563737] [2021-08-21 12:30:59,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:30:59,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:30:59,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:30:59,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:30:59,898 INFO L87 Difference]: Start difference. First operand 19050 states and 42389 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:00,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:00,029 INFO L93 Difference]: Finished difference Result 20381 states and 44592 transitions. [2021-08-21 12:31:00,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:31:00,030 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:31:00,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:00,059 INFO L225 Difference]: With dead ends: 20381 [2021-08-21 12:31:00,059 INFO L226 Difference]: Without dead ends: 20349 [2021-08-21 12:31:00,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:31:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20349 states. [2021-08-21 12:31:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20349 to 19030. [2021-08-21 12:31:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.2227652530348414) internal successors, (42297), 19029 states have internal predecessors, (42297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42297 transitions. [2021-08-21 12:31:00,351 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42297 transitions. Word has length 46 [2021-08-21 12:31:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:00,351 INFO L470 AbstractCegarLoop]: Abstraction has 19030 states and 42297 transitions. [2021-08-21 12:31:00,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42297 transitions. [2021-08-21 12:31:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:31:00,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:00,367 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:00,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:00,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:00,584 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:00,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:00,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1947475682, now seen corresponding path program 30 times [2021-08-21 12:31:00,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:00,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094292433] [2021-08-21 12:31:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:00,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:00,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:00,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094292433] [2021-08-21 12:31:00,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094292433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:00,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658993789] [2021-08-21 12:31:00,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:31:00,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:00,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:00,623 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) [2021-08-21 12:31:00,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 12:31:01,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:31:01,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:01,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:31:01,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:01,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658993789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:01,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:01,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:01,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898125716] [2021-08-21 12:31:01,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:01,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:01,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:01,247 INFO L87 Difference]: Start difference. First operand 19030 states and 42297 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:01,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:01,378 INFO L93 Difference]: Finished difference Result 20409 states and 44584 transitions. [2021-08-21 12:31:01,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:31:01,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:31:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:01,407 INFO L225 Difference]: With dead ends: 20409 [2021-08-21 12:31:01,407 INFO L226 Difference]: Without dead ends: 20337 [2021-08-21 12:31:01,407 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20337 states. [2021-08-21 12:31:01,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20337 to 19030. [2021-08-21 12:31:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.216459088759262) internal successors, (42177), 19029 states have internal predecessors, (42177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42177 transitions. [2021-08-21 12:31:01,773 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42177 transitions. Word has length 46 [2021-08-21 12:31:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:01,773 INFO L470 AbstractCegarLoop]: Abstraction has 19030 states and 42177 transitions. [2021-08-21 12:31:01,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42177 transitions. [2021-08-21 12:31:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:31:01,787 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:01,788 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:01,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:02,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:02,005 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:02,005 INFO L82 PathProgramCache]: Analyzing trace with hash -985460164, now seen corresponding path program 31 times [2021-08-21 12:31:02,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:02,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81848311] [2021-08-21 12:31:02,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:02,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:02,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:02,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81848311] [2021-08-21 12:31:02,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81848311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:02,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869065896] [2021-08-21 12:31:02,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:31:02,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:02,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:02,048 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) [2021-08-21 12:31:02,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 12:31:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:02,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:31:02,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:02,687 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:02,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869065896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:02,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:02,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:31:02,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728446830] [2021-08-21 12:31:02,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:31:02,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:02,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:31:02,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:31:02,688 INFO L87 Difference]: Start difference. First operand 19030 states and 42177 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:02,836 INFO L93 Difference]: Finished difference Result 20155 states and 44063 transitions. [2021-08-21 12:31:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:02,837 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:31:02,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:02,862 INFO L225 Difference]: With dead ends: 20155 [2021-08-21 12:31:02,862 INFO L226 Difference]: Without dead ends: 20027 [2021-08-21 12:31:02,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:31:02,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2021-08-21 12:31:03,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 19078. [2021-08-21 12:31:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19078 states, 19077 states have (on average 2.210043507889081) internal successors, (42161), 19077 states have internal predecessors, (42161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19078 states to 19078 states and 42161 transitions. [2021-08-21 12:31:03,094 INFO L78 Accepts]: Start accepts. Automaton has 19078 states and 42161 transitions. Word has length 46 [2021-08-21 12:31:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:03,095 INFO L470 AbstractCegarLoop]: Abstraction has 19078 states and 42161 transitions. [2021-08-21 12:31:03,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 19078 states and 42161 transitions. [2021-08-21 12:31:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:31:03,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:03,111 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:03,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:03,328 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,SelfDestructingSolverStorable43 [2021-08-21 12:31:03,328 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:03,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:03,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1707831838, now seen corresponding path program 32 times [2021-08-21 12:31:03,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:03,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808163723] [2021-08-21 12:31:03,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:03,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:31:03,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:03,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808163723] [2021-08-21 12:31:03,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808163723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:03,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060800995] [2021-08-21 12:31:03,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:31:03,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:03,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:03,373 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) [2021-08-21 12:31:03,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 12:31:03,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:31:03,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:03,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:31:03,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:31:04,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060800995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:04,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:04,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:31:04,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319068789] [2021-08-21 12:31:04,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:31:04,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:04,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:31:04,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:31:04,054 INFO L87 Difference]: Start difference. First operand 19078 states and 42161 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:04,193 INFO L93 Difference]: Finished difference Result 20680 states and 45191 transitions. [2021-08-21 12:31:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:31:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:31:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:04,220 INFO L225 Difference]: With dead ends: 20680 [2021-08-21 12:31:04,220 INFO L226 Difference]: Without dead ends: 20680 [2021-08-21 12:31:04,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:31:04,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20680 states. [2021-08-21 12:31:04,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20680 to 17730. [2021-08-21 12:31:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17730 states, 17729 states have (on average 2.2009701618816626) internal successors, (39021), 17729 states have internal predecessors, (39021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:04,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17730 states to 17730 states and 39021 transitions. [2021-08-21 12:31:04,595 INFO L78 Accepts]: Start accepts. Automaton has 17730 states and 39021 transitions. Word has length 46 [2021-08-21 12:31:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:04,595 INFO L470 AbstractCegarLoop]: Abstraction has 17730 states and 39021 transitions. [2021-08-21 12:31:04,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 17730 states and 39021 transitions. [2021-08-21 12:31:04,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:31:04,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:04,609 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:04,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:04,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 12:31:04,826 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:04,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1291312306, now seen corresponding path program 33 times [2021-08-21 12:31:04,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:04,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751648388] [2021-08-21 12:31:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:04,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:31:04,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:04,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751648388] [2021-08-21 12:31:04,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751648388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:04,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969922733] [2021-08-21 12:31:04,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:31:04,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:04,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:04,866 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) [2021-08-21 12:31:04,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 12:31:05,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:31:05,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:05,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:31:05,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:31:05,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969922733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:05,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:05,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:05,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985529381] [2021-08-21 12:31:05,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:05,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:05,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:05,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:05,551 INFO L87 Difference]: Start difference. First operand 17730 states and 39021 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:05,674 INFO L93 Difference]: Finished difference Result 19104 states and 41588 transitions. [2021-08-21 12:31:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:31:05,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:31:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:05,699 INFO L225 Difference]: With dead ends: 19104 [2021-08-21 12:31:05,699 INFO L226 Difference]: Without dead ends: 19104 [2021-08-21 12:31:05,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:05,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19104 states. [2021-08-21 12:31:05,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19104 to 17742. [2021-08-21 12:31:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17742 states, 17741 states have (on average 2.200834225804633) internal successors, (39045), 17741 states have internal predecessors, (39045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17742 states to 17742 states and 39045 transitions. [2021-08-21 12:31:06,040 INFO L78 Accepts]: Start accepts. Automaton has 17742 states and 39045 transitions. Word has length 46 [2021-08-21 12:31:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:06,040 INFO L470 AbstractCegarLoop]: Abstraction has 17742 states and 39045 transitions. [2021-08-21 12:31:06,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 17742 states and 39045 transitions. [2021-08-21 12:31:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:31:06,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:06,055 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:06,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:06,257 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,SelfDestructingSolverStorable45 [2021-08-21 12:31:06,257 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:06,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:06,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1852613086, now seen corresponding path program 34 times [2021-08-21 12:31:06,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:06,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957613021] [2021-08-21 12:31:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:06,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:06,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:06,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957613021] [2021-08-21 12:31:06,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957613021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:06,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300095380] [2021-08-21 12:31:06,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:31:06,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:06,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:06,316 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) [2021-08-21 12:31:06,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 12:31:07,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:31:07,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:31:07,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:07,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300095380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:07,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:07,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:31:07,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450719647] [2021-08-21 12:31:07,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:31:07,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:07,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:31:07,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:31:07,208 INFO L87 Difference]: Start difference. First operand 17742 states and 39045 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:07,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:07,334 INFO L93 Difference]: Finished difference Result 21829 states and 47682 transitions. [2021-08-21 12:31:07,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:31:07,335 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:31:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:07,367 INFO L225 Difference]: With dead ends: 21829 [2021-08-21 12:31:07,367 INFO L226 Difference]: Without dead ends: 21829 [2021-08-21 12:31:07,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:31:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21829 states. [2021-08-21 12:31:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21829 to 20406. [2021-08-21 12:31:07,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20406 states, 20405 states have (on average 2.2182308257779955) internal successors, (45263), 20405 states have internal predecessors, (45263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20406 states to 20406 states and 45263 transitions. [2021-08-21 12:31:07,702 INFO L78 Accepts]: Start accepts. Automaton has 20406 states and 45263 transitions. Word has length 46 [2021-08-21 12:31:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:07,702 INFO L470 AbstractCegarLoop]: Abstraction has 20406 states and 45263 transitions. [2021-08-21 12:31:07,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 20406 states and 45263 transitions. [2021-08-21 12:31:07,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:31:07,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:07,721 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:07,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-21 12:31:07,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 12:31:07,940 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:07,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1272298210, now seen corresponding path program 35 times [2021-08-21 12:31:07,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:07,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054724829] [2021-08-21 12:31:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:07,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:07,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:07,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054724829] [2021-08-21 12:31:07,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054724829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:07,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249959274] [2021-08-21 12:31:07,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:31:07,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:07,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:07,979 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) [2021-08-21 12:31:07,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 12:31:08,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:31:08,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:08,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 12:31:08,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:08,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249959274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:08,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:08,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-21 12:31:08,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335681820] [2021-08-21 12:31:08,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:31:08,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:08,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:31:08,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:31:08,858 INFO L87 Difference]: Start difference. First operand 20406 states and 45263 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:08,983 INFO L93 Difference]: Finished difference Result 21712 states and 47427 transitions. [2021-08-21 12:31:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:31:08,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:31:08,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:09,013 INFO L225 Difference]: With dead ends: 21712 [2021-08-21 12:31:09,013 INFO L226 Difference]: Without dead ends: 21704 [2021-08-21 12:31:09,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:31:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21704 states. [2021-08-21 12:31:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21704 to 20402. [2021-08-21 12:31:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.21768540757806) internal successors, (45243), 20401 states have internal predecessors, (45243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45243 transitions. [2021-08-21 12:31:09,300 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45243 transitions. Word has length 46 [2021-08-21 12:31:09,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:09,300 INFO L470 AbstractCegarLoop]: Abstraction has 20402 states and 45243 transitions. [2021-08-21 12:31:09,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45243 transitions. [2021-08-21 12:31:09,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 12:31:09,316 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:09,316 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:09,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:09,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:09,533 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:09,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:09,533 INFO L82 PathProgramCache]: Analyzing trace with hash 485929220, now seen corresponding path program 36 times [2021-08-21 12:31:09,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:09,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988876983] [2021-08-21 12:31:09,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:09,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:09,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:09,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988876983] [2021-08-21 12:31:09,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988876983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:09,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354729411] [2021-08-21 12:31:09,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:31:09,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:09,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:09,697 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) [2021-08-21 12:31:09,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 12:31:10,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:31:10,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:10,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-21 12:31:10,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:31:10,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354729411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:10,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:10,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-21 12:31:10,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094745747] [2021-08-21 12:31:10,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:31:10,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:10,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:31:10,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:10,567 INFO L87 Difference]: Start difference. First operand 20402 states and 45243 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:11,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:11,071 INFO L93 Difference]: Finished difference Result 28400 states and 61628 transitions. [2021-08-21 12:31:11,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:31:11,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 12:31:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:11,127 INFO L225 Difference]: With dead ends: 28400 [2021-08-21 12:31:11,127 INFO L226 Difference]: Without dead ends: 28376 [2021-08-21 12:31:11,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 265.7ms TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 12:31:11,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28376 states. [2021-08-21 12:31:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28376 to 20402. [2021-08-21 12:31:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.212979755894319) internal successors, (45147), 20401 states have internal predecessors, (45147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:11,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45147 transitions. [2021-08-21 12:31:11,482 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45147 transitions. Word has length 46 [2021-08-21 12:31:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:11,482 INFO L470 AbstractCegarLoop]: Abstraction has 20402 states and 45147 transitions. [2021-08-21 12:31:11,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45147 transitions. [2021-08-21 12:31:11,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:11,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:11,504 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:11,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-21 12:31:11,706 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,SelfDestructingSolverStorable48 [2021-08-21 12:31:11,706 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:11,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:11,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1946892925, now seen corresponding path program 37 times [2021-08-21 12:31:11,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:11,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094920139] [2021-08-21 12:31:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:11,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:11,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:11,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094920139] [2021-08-21 12:31:11,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094920139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:11,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119799584] [2021-08-21 12:31:11,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:31:11,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:11,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:11,782 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) [2021-08-21 12:31:11,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 12:31:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:12,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:12,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:12,731 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:12,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119799584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:12,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:12,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:31:12,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002854349] [2021-08-21 12:31:12,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:31:12,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:12,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:31:12,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:31:12,732 INFO L87 Difference]: Start difference. First operand 20402 states and 45147 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:12,959 INFO L93 Difference]: Finished difference Result 25889 states and 56595 transitions. [2021-08-21 12:31:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:13,008 INFO L225 Difference]: With dead ends: 25889 [2021-08-21 12:31:13,008 INFO L226 Difference]: Without dead ends: 25889 [2021-08-21 12:31:13,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:31:13,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25889 states. [2021-08-21 12:31:13,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25889 to 21836. [2021-08-21 12:31:13,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21836 states, 21835 states have (on average 2.216762079230593) internal successors, (48403), 21835 states have internal predecessors, (48403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21836 states to 21836 states and 48403 transitions. [2021-08-21 12:31:13,510 INFO L78 Accepts]: Start accepts. Automaton has 21836 states and 48403 transitions. Word has length 56 [2021-08-21 12:31:13,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:13,510 INFO L470 AbstractCegarLoop]: Abstraction has 21836 states and 48403 transitions. [2021-08-21 12:31:13,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 21836 states and 48403 transitions. [2021-08-21 12:31:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:13,535 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:13,535 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:13,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:13,752 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,SelfDestructingSolverStorable49 [2021-08-21 12:31:13,753 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:13,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:13,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1444684786, now seen corresponding path program 38 times [2021-08-21 12:31:13,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:13,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999831648] [2021-08-21 12:31:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:13,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:13,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:13,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999831648] [2021-08-21 12:31:13,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999831648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:13,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967409955] [2021-08-21 12:31:13,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:31:13,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:13,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:13,830 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) [2021-08-21 12:31:13,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 12:31:14,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:31:14,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:14,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967409955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:14,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:14,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:31:14,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452202141] [2021-08-21 12:31:14,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:31:14,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:14,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:31:14,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:31:14,702 INFO L87 Difference]: Start difference. First operand 21836 states and 48403 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:15,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:15,001 INFO L93 Difference]: Finished difference Result 31481 states and 69778 transitions. [2021-08-21 12:31:15,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:31:15,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:15,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:15,063 INFO L225 Difference]: With dead ends: 31481 [2021-08-21 12:31:15,063 INFO L226 Difference]: Without dead ends: 31323 [2021-08-21 12:31:15,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:31:15,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31323 states. [2021-08-21 12:31:15,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31323 to 30212. [2021-08-21 12:31:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30212 states, 30211 states have (on average 2.2320015888252622) internal successors, (67431), 30211 states have internal predecessors, (67431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30212 states to 30212 states and 67431 transitions. [2021-08-21 12:31:15,592 INFO L78 Accepts]: Start accepts. Automaton has 30212 states and 67431 transitions. Word has length 56 [2021-08-21 12:31:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:15,593 INFO L470 AbstractCegarLoop]: Abstraction has 30212 states and 67431 transitions. [2021-08-21 12:31:15,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 30212 states and 67431 transitions. [2021-08-21 12:31:15,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:15,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:15,624 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:15,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:15,841 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,SelfDestructingSolverStorable50 [2021-08-21 12:31:15,841 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:15,841 INFO L82 PathProgramCache]: Analyzing trace with hash -548599866, now seen corresponding path program 39 times [2021-08-21 12:31:15,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:15,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040000227] [2021-08-21 12:31:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:15,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:15,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:15,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040000227] [2021-08-21 12:31:15,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040000227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:15,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702407906] [2021-08-21 12:31:15,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:31:15,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:15,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:15,887 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) [2021-08-21 12:31:15,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 12:31:16,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:31:16,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:16,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:16,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:16,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702407906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:16,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:16,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:16,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318406781] [2021-08-21 12:31:16,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:16,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:16,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:16,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:16,867 INFO L87 Difference]: Start difference. First operand 30212 states and 67431 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:17,143 INFO L93 Difference]: Finished difference Result 31139 states and 68850 transitions. [2021-08-21 12:31:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:17,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:17,195 INFO L225 Difference]: With dead ends: 31139 [2021-08-21 12:31:17,195 INFO L226 Difference]: Without dead ends: 31139 [2021-08-21 12:31:17,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31139 states. [2021-08-21 12:31:17,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31139 to 28244. [2021-08-21 12:31:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28244 states, 28243 states have (on average 2.2232411571008743) internal successors, (62791), 28243 states have internal predecessors, (62791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28244 states to 28244 states and 62791 transitions. [2021-08-21 12:31:17,703 INFO L78 Accepts]: Start accepts. Automaton has 28244 states and 62791 transitions. Word has length 56 [2021-08-21 12:31:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:17,703 INFO L470 AbstractCegarLoop]: Abstraction has 28244 states and 62791 transitions. [2021-08-21 12:31:17,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 28244 states and 62791 transitions. [2021-08-21 12:31:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:17,731 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:17,731 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:17,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:17,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:17,943 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:17,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:17,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1311786947, now seen corresponding path program 40 times [2021-08-21 12:31:17,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:17,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601477999] [2021-08-21 12:31:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:17,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:18,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:18,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601477999] [2021-08-21 12:31:18,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601477999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:18,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062756842] [2021-08-21 12:31:18,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:31:18,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:18,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:18,015 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) [2021-08-21 12:31:18,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 12:31:18,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:31:18,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:18,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:18,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:18,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062756842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:18,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:18,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:18,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762004300] [2021-08-21 12:31:18,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:18,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:18,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:18,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:18,994 INFO L87 Difference]: Start difference. First operand 28244 states and 62791 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:19,233 INFO L93 Difference]: Finished difference Result 29356 states and 64669 transitions. [2021-08-21 12:31:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:19,233 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:19,289 INFO L225 Difference]: With dead ends: 29356 [2021-08-21 12:31:19,290 INFO L226 Difference]: Without dead ends: 29352 [2021-08-21 12:31:19,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29352 states. [2021-08-21 12:31:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29352 to 27360. [2021-08-21 12:31:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27360 states, 27359 states have (on average 2.2246061625059395) internal successors, (60863), 27359 states have internal predecessors, (60863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:19,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27360 states to 27360 states and 60863 transitions. [2021-08-21 12:31:19,813 INFO L78 Accepts]: Start accepts. Automaton has 27360 states and 60863 transitions. Word has length 56 [2021-08-21 12:31:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:19,814 INFO L470 AbstractCegarLoop]: Abstraction has 27360 states and 60863 transitions. [2021-08-21 12:31:19,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 27360 states and 60863 transitions. [2021-08-21 12:31:19,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:19,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:19,841 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:19,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 12:31:20,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:20,057 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:20,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1210419453, now seen corresponding path program 41 times [2021-08-21 12:31:20,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:20,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242469175] [2021-08-21 12:31:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:20,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:20,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:20,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242469175] [2021-08-21 12:31:20,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242469175] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:20,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113633203] [2021-08-21 12:31:20,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:31:20,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:20,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:20,137 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) [2021-08-21 12:31:20,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 12:31:20,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 12:31:20,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:20,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:20,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:21,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113633203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:21,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:21,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:21,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767441865] [2021-08-21 12:31:21,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:21,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:21,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:21,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:21,117 INFO L87 Difference]: Start difference. First operand 27360 states and 60863 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:21,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:21,339 INFO L93 Difference]: Finished difference Result 35236 states and 77241 transitions. [2021-08-21 12:31:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:21,340 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:21,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:21,399 INFO L225 Difference]: With dead ends: 35236 [2021-08-21 12:31:21,399 INFO L226 Difference]: Without dead ends: 35236 [2021-08-21 12:31:21,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:21,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35236 states. [2021-08-21 12:31:21,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35236 to 31608. [2021-08-21 12:31:21,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31608 states, 31607 states have (on average 2.2330180023412534) internal successors, (70579), 31607 states have internal predecessors, (70579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31608 states to 31608 states and 70579 transitions. [2021-08-21 12:31:21,971 INFO L78 Accepts]: Start accepts. Automaton has 31608 states and 70579 transitions. Word has length 56 [2021-08-21 12:31:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:21,971 INFO L470 AbstractCegarLoop]: Abstraction has 31608 states and 70579 transitions. [2021-08-21 12:31:21,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 31608 states and 70579 transitions. [2021-08-21 12:31:22,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:22,004 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:22,004 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:22,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:22,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:22,222 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:22,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:22,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2089592974, now seen corresponding path program 42 times [2021-08-21 12:31:22,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:22,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040089003] [2021-08-21 12:31:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:22,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:22,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:22,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040089003] [2021-08-21 12:31:22,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040089003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:22,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494560003] [2021-08-21 12:31:22,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:31:22,264 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:22,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:22,265 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) [2021-08-21 12:31:22,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 12:31:23,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:31:23,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:23,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:23,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:23,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494560003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:23,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:23,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:23,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217797745] [2021-08-21 12:31:23,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:23,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:23,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:23,263 INFO L87 Difference]: Start difference. First operand 31608 states and 70579 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:23,528 INFO L93 Difference]: Finished difference Result 34730 states and 77163 transitions. [2021-08-21 12:31:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:23,529 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:23,596 INFO L225 Difference]: With dead ends: 34730 [2021-08-21 12:31:23,596 INFO L226 Difference]: Without dead ends: 34724 [2021-08-21 12:31:23,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:23,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34724 states. [2021-08-21 12:31:24,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34724 to 33620. [2021-08-21 12:31:24,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33620 states, 33619 states have (on average 2.240013087837235) internal successors, (75307), 33619 states have internal predecessors, (75307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:24,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33620 states to 33620 states and 75307 transitions. [2021-08-21 12:31:24,208 INFO L78 Accepts]: Start accepts. Automaton has 33620 states and 75307 transitions. Word has length 56 [2021-08-21 12:31:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:24,208 INFO L470 AbstractCegarLoop]: Abstraction has 33620 states and 75307 transitions. [2021-08-21 12:31:24,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:24,209 INFO L276 IsEmpty]: Start isEmpty. Operand 33620 states and 75307 transitions. [2021-08-21 12:31:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:24,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:24,236 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:24,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:24,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 12:31:24,445 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:24,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:24,445 INFO L82 PathProgramCache]: Analyzing trace with hash -815205434, now seen corresponding path program 43 times [2021-08-21 12:31:24,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:24,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77115487] [2021-08-21 12:31:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:24,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:24,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:24,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77115487] [2021-08-21 12:31:24,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77115487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:24,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004687232] [2021-08-21 12:31:24,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:31:24,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:24,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:24,508 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) [2021-08-21 12:31:24,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 12:31:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:25,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:25,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:25,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004687232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:25,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:25,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:25,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972648637] [2021-08-21 12:31:25,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:25,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:25,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:25,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:25,550 INFO L87 Difference]: Start difference. First operand 33620 states and 75307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:25,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:25,771 INFO L93 Difference]: Finished difference Result 35642 states and 78991 transitions. [2021-08-21 12:31:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:25,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:25,826 INFO L225 Difference]: With dead ends: 35642 [2021-08-21 12:31:25,827 INFO L226 Difference]: Without dead ends: 35640 [2021-08-21 12:31:25,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:25,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35640 states. [2021-08-21 12:31:26,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35640 to 33704. [2021-08-21 12:31:26,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33704 states, 33703 states have (on average 2.237159896745097) internal successors, (75399), 33703 states have internal predecessors, (75399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33704 states to 33704 states and 75399 transitions. [2021-08-21 12:31:26,372 INFO L78 Accepts]: Start accepts. Automaton has 33704 states and 75399 transitions. Word has length 56 [2021-08-21 12:31:26,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:26,372 INFO L470 AbstractCegarLoop]: Abstraction has 33704 states and 75399 transitions. [2021-08-21 12:31:26,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 33704 states and 75399 transitions. [2021-08-21 12:31:26,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:26,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:26,401 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:26,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:26,603 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,SelfDestructingSolverStorable55 [2021-08-21 12:31:26,603 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:26,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:26,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1578392515, now seen corresponding path program 44 times [2021-08-21 12:31:26,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:26,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147386538] [2021-08-21 12:31:26,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:26,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:26,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:26,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147386538] [2021-08-21 12:31:26,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147386538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:26,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225279804] [2021-08-21 12:31:26,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:31:26,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:26,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:26,678 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) [2021-08-21 12:31:26,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 12:31:27,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:31:27,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:27,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:27,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:27,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225279804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:27,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:27,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:27,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337780560] [2021-08-21 12:31:27,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:27,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:27,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:27,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:27,810 INFO L87 Difference]: Start difference. First operand 33704 states and 75399 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:28,124 INFO L93 Difference]: Finished difference Result 35791 states and 78899 transitions. [2021-08-21 12:31:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:28,125 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:28,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:28,184 INFO L225 Difference]: With dead ends: 35791 [2021-08-21 12:31:28,184 INFO L226 Difference]: Without dead ends: 35723 [2021-08-21 12:31:28,184 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:28,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35723 states. [2021-08-21 12:31:28,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35723 to 33624. [2021-08-21 12:31:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33624 states, 33623 states have (on average 2.2343931237545727) internal successors, (75127), 33623 states have internal predecessors, (75127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33624 states to 33624 states and 75127 transitions. [2021-08-21 12:31:28,737 INFO L78 Accepts]: Start accepts. Automaton has 33624 states and 75127 transitions. Word has length 56 [2021-08-21 12:31:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:28,738 INFO L470 AbstractCegarLoop]: Abstraction has 33624 states and 75127 transitions. [2021-08-21 12:31:28,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:28,738 INFO L276 IsEmpty]: Start isEmpty. Operand 33624 states and 75127 transitions. [2021-08-21 12:31:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:28,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:28,764 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:28,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:28,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-21 12:31:28,967 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:28,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:28,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1394663428, now seen corresponding path program 45 times [2021-08-21 12:31:28,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:28,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201824826] [2021-08-21 12:31:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:28,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:29,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:29,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201824826] [2021-08-21 12:31:29,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201824826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:29,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575983828] [2021-08-21 12:31:29,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:31:29,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:29,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:29,020 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) [2021-08-21 12:31:29,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 12:31:29,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:31:29,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:29,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:29,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:30,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575983828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:30,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:30,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:31:30,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878664367] [2021-08-21 12:31:30,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:31:30,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:30,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:31:30,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:31:30,094 INFO L87 Difference]: Start difference. First operand 33624 states and 75127 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:30,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:30,380 INFO L93 Difference]: Finished difference Result 35258 states and 78007 transitions. [2021-08-21 12:31:30,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:30,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:30,439 INFO L225 Difference]: With dead ends: 35258 [2021-08-21 12:31:30,439 INFO L226 Difference]: Without dead ends: 35256 [2021-08-21 12:31:30,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:31:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35256 states. [2021-08-21 12:31:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35256 to 33208. [2021-08-21 12:31:31,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2308248260908843) internal successors, (74079), 33207 states have internal predecessors, (74079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:31,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74079 transitions. [2021-08-21 12:31:31,080 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74079 transitions. Word has length 56 [2021-08-21 12:31:31,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:31,081 INFO L470 AbstractCegarLoop]: Abstraction has 33208 states and 74079 transitions. [2021-08-21 12:31:31,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:31,081 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74079 transitions. [2021-08-21 12:31:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:31,107 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:31,107 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:31,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:31,325 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,SelfDestructingSolverStorable57 [2021-08-21 12:31:31,325 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:31,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:31,325 INFO L82 PathProgramCache]: Analyzing trace with hash 179834915, now seen corresponding path program 46 times [2021-08-21 12:31:31,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:31,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397180255] [2021-08-21 12:31:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:31,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:31,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:31,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397180255] [2021-08-21 12:31:31,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397180255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:31,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067877840] [2021-08-21 12:31:31,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:31:31,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:31,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:31,371 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) [2021-08-21 12:31:31,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 12:31:32,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:31:32,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:32,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:32,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:32,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067877840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:32,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:32,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:31:32,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392387709] [2021-08-21 12:31:32,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:31:32,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:32,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:31:32,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:31:32,442 INFO L87 Difference]: Start difference. First operand 33208 states and 74079 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:32,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:32,636 INFO L93 Difference]: Finished difference Result 34889 states and 76950 transitions. [2021-08-21 12:31:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:31:32,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:32,689 INFO L225 Difference]: With dead ends: 34889 [2021-08-21 12:31:32,689 INFO L226 Difference]: Without dead ends: 34865 [2021-08-21 12:31:32,689 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:31:32,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34865 states. [2021-08-21 12:31:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34865 to 33208. [2021-08-21 12:31:33,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2297407173186374) internal successors, (74043), 33207 states have internal predecessors, (74043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74043 transitions. [2021-08-21 12:31:33,268 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74043 transitions. Word has length 56 [2021-08-21 12:31:33,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:33,268 INFO L470 AbstractCegarLoop]: Abstraction has 33208 states and 74043 transitions. [2021-08-21 12:31:33,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:33,268 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74043 transitions. [2021-08-21 12:31:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:33,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:33,299 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:33,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:33,517 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,SelfDestructingSolverStorable58 [2021-08-21 12:31:33,517 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:33,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:33,518 INFO L82 PathProgramCache]: Analyzing trace with hash 990043102, now seen corresponding path program 47 times [2021-08-21 12:31:33,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:33,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947750034] [2021-08-21 12:31:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:33,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:33,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:31:33,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:33,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947750034] [2021-08-21 12:31:33,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947750034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:33,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276966760] [2021-08-21 12:31:33,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:31:33,568 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:33,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:33,581 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) [2021-08-21 12:31:33,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 12:31:34,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:31:34,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:34,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:34,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:31:34,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276966760] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:34,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:34,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:34,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973981527] [2021-08-21 12:31:34,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:34,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:34,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:34,680 INFO L87 Difference]: Start difference. First operand 33208 states and 74043 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:34,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:34,852 INFO L93 Difference]: Finished difference Result 35848 states and 79532 transitions. [2021-08-21 12:31:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:31:34,853 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:34,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:34,911 INFO L225 Difference]: With dead ends: 35848 [2021-08-21 12:31:34,911 INFO L226 Difference]: Without dead ends: 35812 [2021-08-21 12:31:34,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2021-08-21 12:31:35,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 32944. [2021-08-21 12:31:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32944 states, 32943 states have (on average 2.231581823149076) internal successors, (73515), 32943 states have internal predecessors, (73515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32944 states to 32944 states and 73515 transitions. [2021-08-21 12:31:35,416 INFO L78 Accepts]: Start accepts. Automaton has 32944 states and 73515 transitions. Word has length 56 [2021-08-21 12:31:35,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:35,416 INFO L470 AbstractCegarLoop]: Abstraction has 32944 states and 73515 transitions. [2021-08-21 12:31:35,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 32944 states and 73515 transitions. [2021-08-21 12:31:35,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:35,443 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:35,443 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:35,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:35,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 12:31:35,661 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:35,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1706411773, now seen corresponding path program 48 times [2021-08-21 12:31:35,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:35,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394692306] [2021-08-21 12:31:35,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:35,662 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:35,701 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:35,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:35,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394692306] [2021-08-21 12:31:35,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394692306] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:35,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033076043] [2021-08-21 12:31:35,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:31:35,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:35,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:35,702 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) [2021-08-21 12:31:35,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 12:31:36,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:31:36,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:36,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:36,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:36,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033076043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:36,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:36,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:36,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019718396] [2021-08-21 12:31:36,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:36,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:36,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:36,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:36,920 INFO L87 Difference]: Start difference. First operand 32944 states and 73515 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:37,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:37,116 INFO L93 Difference]: Finished difference Result 40718 states and 89870 transitions. [2021-08-21 12:31:37,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:37,116 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:37,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:37,183 INFO L225 Difference]: With dead ends: 40718 [2021-08-21 12:31:37,183 INFO L226 Difference]: Without dead ends: 40718 [2021-08-21 12:31:37,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:37,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40718 states. [2021-08-21 12:31:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40718 to 37152. [2021-08-21 12:31:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37152 states, 37151 states have (on average 2.2417431563080403) internal successors, (83283), 37151 states have internal predecessors, (83283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:37,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37152 states to 37152 states and 83283 transitions. [2021-08-21 12:31:37,727 INFO L78 Accepts]: Start accepts. Automaton has 37152 states and 83283 transitions. Word has length 56 [2021-08-21 12:31:37,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:37,727 INFO L470 AbstractCegarLoop]: Abstraction has 37152 states and 83283 transitions. [2021-08-21 12:31:37,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 37152 states and 83283 transitions. [2021-08-21 12:31:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:37,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:37,753 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:37,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 12:31:37,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:37,971 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:37,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:37,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1593600654, now seen corresponding path program 49 times [2021-08-21 12:31:37,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:37,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223243161] [2021-08-21 12:31:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:37,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:38,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:38,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223243161] [2021-08-21 12:31:38,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223243161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:38,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711341908] [2021-08-21 12:31:38,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:31:38,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:38,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:38,013 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) [2021-08-21 12:31:38,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 12:31:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:38,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:38,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:39,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711341908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:39,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:39,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:39,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255373420] [2021-08-21 12:31:39,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:39,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:39,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:39,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:39,048 INFO L87 Difference]: Start difference. First operand 37152 states and 83283 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:39,238 INFO L93 Difference]: Finished difference Result 40524 states and 90274 transitions. [2021-08-21 12:31:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:39,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:39,435 INFO L225 Difference]: With dead ends: 40524 [2021-08-21 12:31:39,436 INFO L226 Difference]: Without dead ends: 40488 [2021-08-21 12:31:39,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:39,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40488 states. [2021-08-21 12:31:39,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40488 to 36712. [2021-08-21 12:31:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36712 states, 36711 states have (on average 2.242025550924791) internal successors, (82307), 36711 states have internal predecessors, (82307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36712 states to 36712 states and 82307 transitions. [2021-08-21 12:31:39,993 INFO L78 Accepts]: Start accepts. Automaton has 36712 states and 82307 transitions. Word has length 56 [2021-08-21 12:31:39,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:39,993 INFO L470 AbstractCegarLoop]: Abstraction has 36712 states and 82307 transitions. [2021-08-21 12:31:39,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:39,993 INFO L276 IsEmpty]: Start isEmpty. Operand 36712 states and 82307 transitions. [2021-08-21 12:31:40,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:40,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:40,021 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:40,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:40,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:40,237 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:40,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:40,237 INFO L82 PathProgramCache]: Analyzing trace with hash -319213114, now seen corresponding path program 50 times [2021-08-21 12:31:40,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:40,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664265281] [2021-08-21 12:31:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:40,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:40,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:40,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664265281] [2021-08-21 12:31:40,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664265281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:40,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126214188] [2021-08-21 12:31:40,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:31:40,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:40,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:40,293 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) [2021-08-21 12:31:40,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 12:31:41,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:31:41,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:41,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:41,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:41,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126214188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:41,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:41,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:41,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853184303] [2021-08-21 12:31:41,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:41,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:41,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:41,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:41,479 INFO L87 Difference]: Start difference. First operand 36712 states and 82307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:41,651 INFO L93 Difference]: Finished difference Result 39280 states and 87158 transitions. [2021-08-21 12:31:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:41,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:41,709 INFO L225 Difference]: With dead ends: 39280 [2021-08-21 12:31:41,709 INFO L226 Difference]: Without dead ends: 39278 [2021-08-21 12:31:41,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39278 states. [2021-08-21 12:31:42,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39278 to 36836. [2021-08-21 12:31:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36836 states, 36835 states have (on average 2.2415365820551107) internal successors, (82567), 36835 states have internal predecessors, (82567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36836 states to 36836 states and 82567 transitions. [2021-08-21 12:31:42,468 INFO L78 Accepts]: Start accepts. Automaton has 36836 states and 82567 transitions. Word has length 56 [2021-08-21 12:31:42,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:42,468 INFO L470 AbstractCegarLoop]: Abstraction has 36836 states and 82567 transitions. [2021-08-21 12:31:42,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:42,468 INFO L276 IsEmpty]: Start isEmpty. Operand 36836 states and 82567 transitions. [2021-08-21 12:31:42,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:42,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:42,491 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:42,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:42,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:42,710 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:42,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:42,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1082400195, now seen corresponding path program 51 times [2021-08-21 12:31:42,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:42,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465274201] [2021-08-21 12:31:42,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:42,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:42,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:42,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465274201] [2021-08-21 12:31:42,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465274201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:42,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781222131] [2021-08-21 12:31:42,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:31:42,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:42,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:42,751 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) [2021-08-21 12:31:42,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 12:31:43,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:31:43,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:43,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:31:43,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-21 12:31:44,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781222131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:44,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:44,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-21 12:31:44,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97500709] [2021-08-21 12:31:44,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:31:44,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:44,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:31:44,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:31:44,017 INFO L87 Difference]: Start difference. First operand 36836 states and 82567 transitions. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:44,872 INFO L93 Difference]: Finished difference Result 65704 states and 142418 transitions. [2021-08-21 12:31:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 12:31:44,872 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:44,975 INFO L225 Difference]: With dead ends: 65704 [2021-08-21 12:31:44,976 INFO L226 Difference]: Without dead ends: 65560 [2021-08-21 12:31:44,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 381.1ms TimeCoverageRelationStatistics Valid=437, Invalid=2755, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 12:31:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65560 states. [2021-08-21 12:31:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65560 to 50470. [2021-08-21 12:31:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50470 states, 50469 states have (on average 2.2044225167924867) internal successors, (111255), 50469 states have internal predecessors, (111255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50470 states to 50470 states and 111255 transitions. [2021-08-21 12:31:46,092 INFO L78 Accepts]: Start accepts. Automaton has 50470 states and 111255 transitions. Word has length 56 [2021-08-21 12:31:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:46,092 INFO L470 AbstractCegarLoop]: Abstraction has 50470 states and 111255 transitions. [2021-08-21 12:31:46,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 50470 states and 111255 transitions. [2021-08-21 12:31:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:46,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:46,121 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:46,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:46,336 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,SelfDestructingSolverStorable63 [2021-08-21 12:31:46,337 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:46,337 INFO L82 PathProgramCache]: Analyzing trace with hash -898671108, now seen corresponding path program 52 times [2021-08-21 12:31:46,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:46,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833694027] [2021-08-21 12:31:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:46,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:46,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:46,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833694027] [2021-08-21 12:31:46,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833694027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:46,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069504940] [2021-08-21 12:31:46,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:31:46,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:46,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:46,382 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) [2021-08-21 12:31:46,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 12:31:47,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:31:47,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:47,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:47,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:47,619 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:47,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069504940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:47,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:47,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:31:47,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741398503] [2021-08-21 12:31:47,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:31:47,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:47,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:31:47,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:31:47,620 INFO L87 Difference]: Start difference. First operand 50470 states and 111255 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:47,868 INFO L93 Difference]: Finished difference Result 57450 states and 125218 transitions. [2021-08-21 12:31:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:31:47,869 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:47,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:47,967 INFO L225 Difference]: With dead ends: 57450 [2021-08-21 12:31:47,968 INFO L226 Difference]: Without dead ends: 57432 [2021-08-21 12:31:47,968 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:31:48,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57432 states. [2021-08-21 12:31:48,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57432 to 50730. [2021-08-21 12:31:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50730 states, 50729 states have (on average 2.2019554889708055) internal successors, (111703), 50729 states have internal predecessors, (111703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50730 states to 50730 states and 111703 transitions. [2021-08-21 12:31:49,018 INFO L78 Accepts]: Start accepts. Automaton has 50730 states and 111703 transitions. Word has length 56 [2021-08-21 12:31:49,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:49,018 INFO L470 AbstractCegarLoop]: Abstraction has 50730 states and 111703 transitions. [2021-08-21 12:31:49,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:49,019 INFO L276 IsEmpty]: Start isEmpty. Operand 50730 states and 111703 transitions. [2021-08-21 12:31:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:49,055 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:49,055 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:49,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:49,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 12:31:49,274 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:49,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:49,274 INFO L82 PathProgramCache]: Analyzing trace with hash 554193822, now seen corresponding path program 53 times [2021-08-21 12:31:49,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:49,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27270929] [2021-08-21 12:31:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:49,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:49,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:49,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27270929] [2021-08-21 12:31:49,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27270929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:49,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137697046] [2021-08-21 12:31:49,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:31:49,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:49,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:49,325 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) [2021-08-21 12:31:49,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 12:31:50,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:31:50,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:50,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:50,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:31:50,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137697046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:50,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:50,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:31:50,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950779378] [2021-08-21 12:31:50,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:31:50,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:50,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:31:50,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:31:50,574 INFO L87 Difference]: Start difference. First operand 50730 states and 111703 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:50,973 INFO L93 Difference]: Finished difference Result 53406 states and 116710 transitions. [2021-08-21 12:31:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:50,974 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:50,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:51,062 INFO L225 Difference]: With dead ends: 53406 [2021-08-21 12:31:51,062 INFO L226 Difference]: Without dead ends: 53388 [2021-08-21 12:31:51,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:31:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53388 states. [2021-08-21 12:31:51,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53388 to 45578. [2021-08-21 12:31:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45578 states, 45577 states have (on average 2.197402198477302) internal successors, (100151), 45577 states have internal predecessors, (100151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45578 states to 45578 states and 100151 transitions. [2021-08-21 12:31:51,767 INFO L78 Accepts]: Start accepts. Automaton has 45578 states and 100151 transitions. Word has length 56 [2021-08-21 12:31:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:51,767 INFO L470 AbstractCegarLoop]: Abstraction has 45578 states and 100151 transitions. [2021-08-21 12:31:51,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 45578 states and 100151 transitions. [2021-08-21 12:31:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:51,794 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:51,794 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:51,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:52,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:52,013 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:52,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2033066574, now seen corresponding path program 54 times [2021-08-21 12:31:52,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:52,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542970680] [2021-08-21 12:31:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:52,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:31:52,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:52,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542970680] [2021-08-21 12:31:52,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542970680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:52,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467502781] [2021-08-21 12:31:52,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:31:52,060 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:52,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:52,074 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) [2021-08-21 12:31:52,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 12:31:53,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:31:53,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:53,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:53,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:31:53,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467502781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:53,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:53,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:31:53,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041076048] [2021-08-21 12:31:53,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:31:53,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:53,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:31:53,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:31:53,438 INFO L87 Difference]: Start difference. First operand 45578 states and 100151 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:53,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:53,809 INFO L93 Difference]: Finished difference Result 49711 states and 108806 transitions. [2021-08-21 12:31:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:53,810 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:53,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:53,898 INFO L225 Difference]: With dead ends: 49711 [2021-08-21 12:31:53,898 INFO L226 Difference]: Without dead ends: 49645 [2021-08-21 12:31:53,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:31:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49645 states. [2021-08-21 12:31:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49645 to 48590. [2021-08-21 12:31:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48590 states, 48589 states have (on average 2.2018769680380332) internal successors, (106987), 48589 states have internal predecessors, (106987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48590 states to 48590 states and 106987 transitions. [2021-08-21 12:31:54,628 INFO L78 Accepts]: Start accepts. Automaton has 48590 states and 106987 transitions. Word has length 56 [2021-08-21 12:31:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:54,628 INFO L470 AbstractCegarLoop]: Abstraction has 48590 states and 106987 transitions. [2021-08-21 12:31:54,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 48590 states and 106987 transitions. [2021-08-21 12:31:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:54,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:54,656 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:54,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 12:31:54,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:54,875 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:54,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:54,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2050274500, now seen corresponding path program 55 times [2021-08-21 12:31:54,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:54,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676740328] [2021-08-21 12:31:54,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:54,875 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:54,917 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:31:54,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:54,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676740328] [2021-08-21 12:31:54,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676740328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:54,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585129428] [2021-08-21 12:31:54,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:31:54,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:54,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:54,925 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) [2021-08-21 12:31:54,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 12:31:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:56,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:56,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:31:56,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585129428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:56,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:56,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:56,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501295847] [2021-08-21 12:31:56,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:56,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:56,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:56,179 INFO L87 Difference]: Start difference. First operand 48590 states and 106987 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:56,501 INFO L93 Difference]: Finished difference Result 51903 states and 113860 transitions. [2021-08-21 12:31:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 12:31:56,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:56,594 INFO L225 Difference]: With dead ends: 51903 [2021-08-21 12:31:56,594 INFO L226 Difference]: Without dead ends: 51867 [2021-08-21 12:31:56,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51867 states. [2021-08-21 12:31:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51867 to 50962. [2021-08-21 12:31:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 2.2042542336296385) internal successors, (112331), 50961 states have internal predecessors, (112331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 112331 transitions. [2021-08-21 12:31:57,392 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 112331 transitions. Word has length 56 [2021-08-21 12:31:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:31:57,392 INFO L470 AbstractCegarLoop]: Abstraction has 50962 states and 112331 transitions. [2021-08-21 12:31:57,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 112331 transitions. [2021-08-21 12:31:57,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:31:57,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:31:57,426 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:31:57,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 12:31:57,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 12:31:57,641 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:31:57,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:31:57,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1255196530, now seen corresponding path program 56 times [2021-08-21 12:31:57,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:31:57,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644676415] [2021-08-21 12:31:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:31:57,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:31:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:31:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:57,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:31:57,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644676415] [2021-08-21 12:31:57,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644676415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:57,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471352551] [2021-08-21 12:31:57,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:31:57,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:31:57,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:31:57,683 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) [2021-08-21 12:31:57,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 12:31:58,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:31:58,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:31:58,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:31:58,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:31:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:31:59,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471352551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:31:59,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:31:59,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:31:59,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160512084] [2021-08-21 12:31:59,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:31:59,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:31:59,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:31:59,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:31:59,111 INFO L87 Difference]: Start difference. First operand 50962 states and 112331 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:31:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:31:59,351 INFO L93 Difference]: Finished difference Result 54564 states and 119631 transitions. [2021-08-21 12:31:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:31:59,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:31:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:31:59,446 INFO L225 Difference]: With dead ends: 54564 [2021-08-21 12:31:59,446 INFO L226 Difference]: Without dead ends: 54522 [2021-08-21 12:31:59,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:31:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54522 states. [2021-08-21 12:32:00,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54522 to 50922. [2021-08-21 12:32:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50922 states, 50921 states have (on average 2.2044932346183304) internal successors, (112255), 50921 states have internal predecessors, (112255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:00,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50922 states to 50922 states and 112255 transitions. [2021-08-21 12:32:00,571 INFO L78 Accepts]: Start accepts. Automaton has 50922 states and 112255 transitions. Word has length 56 [2021-08-21 12:32:00,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:00,571 INFO L470 AbstractCegarLoop]: Abstraction has 50922 states and 112255 transitions. [2021-08-21 12:32:00,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:00,571 INFO L276 IsEmpty]: Start isEmpty. Operand 50922 states and 112255 transitions. [2021-08-21 12:32:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:32:00,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:00,625 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:00,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:00,840 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,SelfDestructingSolverStorable68 [2021-08-21 12:32:00,841 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:00,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1765383226, now seen corresponding path program 57 times [2021-08-21 12:32:00,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:00,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339193803] [2021-08-21 12:32:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:00,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 53 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:00,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:00,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339193803] [2021-08-21 12:32:00,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339193803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:00,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812022847] [2021-08-21 12:32:00,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:32:00,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:00,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:00,882 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) [2021-08-21 12:32:00,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 12:32:02,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:32:02,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:02,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:32:02,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 53 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:02,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812022847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:02,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:02,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:32:02,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053300801] [2021-08-21 12:32:02,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:32:02,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:02,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:32:02,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:32:02,219 INFO L87 Difference]: Start difference. First operand 50922 states and 112255 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:02,433 INFO L93 Difference]: Finished difference Result 54000 states and 117977 transitions. [2021-08-21 12:32:02,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:32:02,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:32:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:02,524 INFO L225 Difference]: With dead ends: 54000 [2021-08-21 12:32:02,524 INFO L226 Difference]: Without dead ends: 53998 [2021-08-21 12:32:02,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:32:02,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53998 states. [2021-08-21 12:32:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53998 to 51006. [2021-08-21 12:32:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51006 states, 51005 states have (on average 2.203842760513675) internal successors, (112407), 51005 states have internal predecessors, (112407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51006 states to 51006 states and 112407 transitions. [2021-08-21 12:32:03,433 INFO L78 Accepts]: Start accepts. Automaton has 51006 states and 112407 transitions. Word has length 56 [2021-08-21 12:32:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:03,433 INFO L470 AbstractCegarLoop]: Abstraction has 51006 states and 112407 transitions. [2021-08-21 12:32:03,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:03,433 INFO L276 IsEmpty]: Start isEmpty. Operand 51006 states and 112407 transitions. [2021-08-21 12:32:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:32:03,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:03,464 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:03,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:03,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:03,683 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:03,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:03,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1950126076, now seen corresponding path program 58 times [2021-08-21 12:32:03,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:03,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983998933] [2021-08-21 12:32:03,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:03,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:03,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:03,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983998933] [2021-08-21 12:32:03,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983998933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:03,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326256106] [2021-08-21 12:32:03,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:32:03,730 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:03,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:03,745 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) [2021-08-21 12:32:03,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 12:32:04,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:32:04,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:04,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:32:04,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:05,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326256106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:05,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:05,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:32:05,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968850765] [2021-08-21 12:32:05,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:32:05,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:05,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:32:05,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:32:05,093 INFO L87 Difference]: Start difference. First operand 51006 states and 112407 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:05,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:05,358 INFO L93 Difference]: Finished difference Result 57784 states and 125981 transitions. [2021-08-21 12:32:05,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:32:05,358 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:32:05,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:05,687 INFO L225 Difference]: With dead ends: 57784 [2021-08-21 12:32:05,687 INFO L226 Difference]: Without dead ends: 57782 [2021-08-21 12:32:05,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:32:05,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57782 states. [2021-08-21 12:32:06,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57782 to 51426. [2021-08-21 12:32:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51426 states, 51425 states have (on average 2.202566844919786) internal successors, (113267), 51425 states have internal predecessors, (113267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51426 states to 51426 states and 113267 transitions. [2021-08-21 12:32:06,521 INFO L78 Accepts]: Start accepts. Automaton has 51426 states and 113267 transitions. Word has length 56 [2021-08-21 12:32:06,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:06,521 INFO L470 AbstractCegarLoop]: Abstraction has 51426 states and 113267 transitions. [2021-08-21 12:32:06,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 51426 states and 113267 transitions. [2021-08-21 12:32:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:32:06,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:06,554 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:06,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-21 12:32:06,772 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,SelfDestructingSolverStorable70 [2021-08-21 12:32:06,772 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash -891976290, now seen corresponding path program 59 times [2021-08-21 12:32:06,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:06,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857018959] [2021-08-21 12:32:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:06,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:06,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:06,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857018959] [2021-08-21 12:32:06,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857018959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:06,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419367954] [2021-08-21 12:32:06,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:32:06,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:06,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:06,825 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) [2021-08-21 12:32:06,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 12:32:08,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:32:08,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:08,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:32:08,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:08,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419367954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:08,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:08,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:32:08,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111570037] [2021-08-21 12:32:08,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:32:08,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:08,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:32:08,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:32:08,227 INFO L87 Difference]: Start difference. First operand 51426 states and 113267 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:08,626 INFO L93 Difference]: Finished difference Result 56504 states and 123265 transitions. [2021-08-21 12:32:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:32:08,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:32:08,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:08,721 INFO L225 Difference]: With dead ends: 56504 [2021-08-21 12:32:08,722 INFO L226 Difference]: Without dead ends: 56502 [2021-08-21 12:32:08,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:32:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56502 states. [2021-08-21 12:32:09,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56502 to 51506. [2021-08-21 12:32:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51506 states, 51505 states have (on average 2.2005436365401416) internal successors, (113339), 51505 states have internal predecessors, (113339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:09,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51506 states to 51506 states and 113339 transitions. [2021-08-21 12:32:09,573 INFO L78 Accepts]: Start accepts. Automaton has 51506 states and 113339 transitions. Word has length 56 [2021-08-21 12:32:09,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:09,573 INFO L470 AbstractCegarLoop]: Abstraction has 51506 states and 113339 transitions. [2021-08-21 12:32:09,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 51506 states and 113339 transitions. [2021-08-21 12:32:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:32:09,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:09,604 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:09,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:09,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:09,822 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:09,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:09,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1541519740, now seen corresponding path program 60 times [2021-08-21 12:32:09,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:09,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094253477] [2021-08-21 12:32:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:09,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:10,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:10,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:10,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094253477] [2021-08-21 12:32:10,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094253477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:10,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492470854] [2021-08-21 12:32:10,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:32:10,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:10,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:10,096 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) [2021-08-21 12:32:10,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 12:32:11,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:32:11,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:11,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:32:11,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:11,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492470854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:11,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:11,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 12:32:11,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550518282] [2021-08-21 12:32:11,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:32:11,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:11,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:32:11,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:32:11,446 INFO L87 Difference]: Start difference. First operand 51506 states and 113339 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:11,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:11,707 INFO L93 Difference]: Finished difference Result 53832 states and 117559 transitions. [2021-08-21 12:32:11,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:32:11,707 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:32:11,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:11,796 INFO L225 Difference]: With dead ends: 53832 [2021-08-21 12:32:11,796 INFO L226 Difference]: Without dead ends: 53830 [2021-08-21 12:32:11,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:32:11,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53830 states. [2021-08-21 12:32:12,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53830 to 49874. [2021-08-21 12:32:12,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49874 states, 49873 states have (on average 2.2004892426763982) internal successors, (109745), 49873 states have internal predecessors, (109745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:12,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49874 states to 49874 states and 109745 transitions. [2021-08-21 12:32:12,806 INFO L78 Accepts]: Start accepts. Automaton has 49874 states and 109745 transitions. Word has length 56 [2021-08-21 12:32:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:12,807 INFO L470 AbstractCegarLoop]: Abstraction has 49874 states and 109745 transitions. [2021-08-21 12:32:12,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:12,807 INFO L276 IsEmpty]: Start isEmpty. Operand 49874 states and 109745 transitions. [2021-08-21 12:32:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:32:12,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:12,834 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:12,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:13,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:13,052 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:13,052 INFO L82 PathProgramCache]: Analyzing trace with hash 348560158, now seen corresponding path program 61 times [2021-08-21 12:32:13,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:13,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819865338] [2021-08-21 12:32:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:13,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:32:13,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:13,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819865338] [2021-08-21 12:32:13,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819865338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:13,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505009044] [2021-08-21 12:32:13,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:32:13,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:13,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:13,110 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) [2021-08-21 12:32:13,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 12:32:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:14,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:32:14,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:32:14,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505009044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:14,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:14,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 12:32:14,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604942100] [2021-08-21 12:32:14,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:32:14,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:14,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:32:14,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:32:14,507 INFO L87 Difference]: Start difference. First operand 49874 states and 109745 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:14,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:14,776 INFO L93 Difference]: Finished difference Result 51331 states and 112086 transitions. [2021-08-21 12:32:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:32:14,777 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:32:14,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:14,863 INFO L225 Difference]: With dead ends: 51331 [2021-08-21 12:32:14,863 INFO L226 Difference]: Without dead ends: 51235 [2021-08-21 12:32:14,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:32:14,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51235 states. [2021-08-21 12:32:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51235 to 47230. [2021-08-21 12:32:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.193673378644477) internal successors, (103605), 47229 states have internal predecessors, (103605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:15,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103605 transitions. [2021-08-21 12:32:15,743 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103605 transitions. Word has length 56 [2021-08-21 12:32:15,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:15,744 INFO L470 AbstractCegarLoop]: Abstraction has 47230 states and 103605 transitions. [2021-08-21 12:32:15,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103605 transitions. [2021-08-21 12:32:15,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:32:15,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:15,774 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:15,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:15,992 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,SelfDestructingSolverStorable73 [2021-08-21 12:32:15,992 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:15,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:15,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1154622286, now seen corresponding path program 62 times [2021-08-21 12:32:15,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:15,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034178328] [2021-08-21 12:32:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:15,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:32:16,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:16,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034178328] [2021-08-21 12:32:16,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034178328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:16,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682327254] [2021-08-21 12:32:16,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:32:16,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:16,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:16,044 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) [2021-08-21 12:32:16,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 12:32:17,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:32:17,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:17,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:32:17,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-21 12:32:17,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682327254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:17,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:17,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:32:17,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151400486] [2021-08-21 12:32:17,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:32:17,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:17,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:32:17,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:32:17,670 INFO L87 Difference]: Start difference. First operand 47230 states and 103605 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:17,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:17,890 INFO L93 Difference]: Finished difference Result 48435 states and 105506 transitions. [2021-08-21 12:32:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:32:17,891 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:32:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:17,962 INFO L225 Difference]: With dead ends: 48435 [2021-08-21 12:32:17,962 INFO L226 Difference]: Without dead ends: 48369 [2021-08-21 12:32:17,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:32:18,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48369 states. [2021-08-21 12:32:18,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48369 to 47230. [2021-08-21 12:32:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1912172605814226) internal successors, (103489), 47229 states have internal predecessors, (103489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:18,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103489 transitions. [2021-08-21 12:32:18,912 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103489 transitions. Word has length 56 [2021-08-21 12:32:18,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:18,912 INFO L470 AbstractCegarLoop]: Abstraction has 47230 states and 103489 transitions. [2021-08-21 12:32:18,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:18,913 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103489 transitions. [2021-08-21 12:32:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:32:18,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:18,943 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:18,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-21 12:32:19,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:19,157 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:19,157 INFO L82 PathProgramCache]: Analyzing trace with hash 813636318, now seen corresponding path program 63 times [2021-08-21 12:32:19,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:19,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371735425] [2021-08-21 12:32:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:19,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:32:19,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:19,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371735425] [2021-08-21 12:32:19,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371735425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:19,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992905359] [2021-08-21 12:32:19,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:32:19,203 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:19,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:19,204 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) [2021-08-21 12:32:19,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 12:32:20,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:32:20,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:20,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:32:20,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:32:20,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992905359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:20,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:20,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:32:20,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624221398] [2021-08-21 12:32:20,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:32:20,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:20,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:32:20,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:32:20,657 INFO L87 Difference]: Start difference. First operand 47230 states and 103489 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:20,876 INFO L93 Difference]: Finished difference Result 48187 states and 104966 transitions. [2021-08-21 12:32:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:32:20,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:32:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:21,115 INFO L225 Difference]: With dead ends: 48187 [2021-08-21 12:32:21,115 INFO L226 Difference]: Without dead ends: 48151 [2021-08-21 12:32:21,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:32:21,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48151 states. [2021-08-21 12:32:21,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48151 to 47230. [2021-08-21 12:32:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1896927735078022) internal successors, (103417), 47229 states have internal predecessors, (103417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:21,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103417 transitions. [2021-08-21 12:32:21,785 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103417 transitions. Word has length 56 [2021-08-21 12:32:21,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:21,786 INFO L470 AbstractCegarLoop]: Abstraction has 47230 states and 103417 transitions. [2021-08-21 12:32:21,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:21,786 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103417 transitions. [2021-08-21 12:32:21,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:32:21,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:21,818 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:21,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:22,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:22,037 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:22,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:22,037 INFO L82 PathProgramCache]: Analyzing trace with hash 397116786, now seen corresponding path program 64 times [2021-08-21 12:32:22,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:22,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389579327] [2021-08-21 12:32:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:22,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:22,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:22,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:22,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389579327] [2021-08-21 12:32:22,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389579327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:22,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103193795] [2021-08-21 12:32:22,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:32:22,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:22,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:22,097 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) [2021-08-21 12:32:22,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 12:32:23,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:32:23,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:23,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:32:23,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:23,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103193795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:23,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:23,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:32:23,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252068125] [2021-08-21 12:32:23,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:32:23,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:23,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:32:23,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:32:23,557 INFO L87 Difference]: Start difference. First operand 47230 states and 103417 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:23,878 INFO L93 Difference]: Finished difference Result 51250 states and 111816 transitions. [2021-08-21 12:32:23,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:32:23,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:32:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:23,963 INFO L225 Difference]: With dead ends: 51250 [2021-08-21 12:32:23,964 INFO L226 Difference]: Without dead ends: 51244 [2021-08-21 12:32:23,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:32:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51244 states. [2021-08-21 12:32:24,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51244 to 50262. [2021-08-21 12:32:24,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50262 states, 50261 states have (on average 2.194723543104992) internal successors, (110309), 50261 states have internal predecessors, (110309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50262 states to 50262 states and 110309 transitions. [2021-08-21 12:32:24,701 INFO L78 Accepts]: Start accepts. Automaton has 50262 states and 110309 transitions. Word has length 56 [2021-08-21 12:32:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:24,701 INFO L470 AbstractCegarLoop]: Abstraction has 50262 states and 110309 transitions. [2021-08-21 12:32:24,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:24,701 INFO L276 IsEmpty]: Start isEmpty. Operand 50262 states and 110309 transitions. [2021-08-21 12:32:24,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:32:24,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:24,737 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:24,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:24,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:24,953 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:24,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:24,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1671504326, now seen corresponding path program 65 times [2021-08-21 12:32:24,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:24,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210381528] [2021-08-21 12:32:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:24,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:24,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:24,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210381528] [2021-08-21 12:32:24,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210381528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:24,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075943380] [2021-08-21 12:32:24,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:32:24,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:24,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:24,997 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) [2021-08-21 12:32:24,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 12:32:26,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:32:26,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:26,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:32:26,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:26,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075943380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:26,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:26,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:32:26,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609789322] [2021-08-21 12:32:26,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:32:26,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:26,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:32:26,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:32:26,495 INFO L87 Difference]: Start difference. First operand 50262 states and 110309 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:26,832 INFO L93 Difference]: Finished difference Result 52650 states and 114688 transitions. [2021-08-21 12:32:26,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:32:26,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:32:26,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:26,915 INFO L225 Difference]: With dead ends: 52650 [2021-08-21 12:32:26,915 INFO L226 Difference]: Without dead ends: 52650 [2021-08-21 12:32:26,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:32:26,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52650 states. [2021-08-21 12:32:27,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52650 to 50294. [2021-08-21 12:32:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50294 states, 50293 states have (on average 2.1945996460740065) internal successors, (110373), 50293 states have internal predecessors, (110373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50294 states to 50294 states and 110373 transitions. [2021-08-21 12:32:27,671 INFO L78 Accepts]: Start accepts. Automaton has 50294 states and 110373 transitions. Word has length 56 [2021-08-21 12:32:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:27,671 INFO L470 AbstractCegarLoop]: Abstraction has 50294 states and 110373 transitions. [2021-08-21 12:32:27,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 50294 states and 110373 transitions. [2021-08-21 12:32:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:32:27,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:27,703 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:27,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:27,932 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,SelfDestructingSolverStorable77 [2021-08-21 12:32:27,932 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:27,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1092046332, now seen corresponding path program 66 times [2021-08-21 12:32:27,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:27,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144979065] [2021-08-21 12:32:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:27,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:27,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:27,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144979065] [2021-08-21 12:32:27,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144979065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:27,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627135022] [2021-08-21 12:32:27,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:32:27,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:27,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:27,981 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) [2021-08-21 12:32:27,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 12:32:29,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:32:29,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:29,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:32:29,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:29,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627135022] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:29,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:29,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:32:29,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144213985] [2021-08-21 12:32:29,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:32:29,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:29,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:32:29,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:32:29,582 INFO L87 Difference]: Start difference. First operand 50294 states and 110373 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:29,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:29,862 INFO L93 Difference]: Finished difference Result 56418 states and 122592 transitions. [2021-08-21 12:32:29,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:32:29,863 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:32:29,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:29,960 INFO L225 Difference]: With dead ends: 56418 [2021-08-21 12:32:29,960 INFO L226 Difference]: Without dead ends: 56418 [2021-08-21 12:32:29,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:32:30,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56418 states. [2021-08-21 12:32:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56418 to 50454. [2021-08-21 12:32:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50454 states, 50453 states have (on average 2.193982518383446) internal successors, (110693), 50453 states have internal predecessors, (110693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50454 states to 50454 states and 110693 transitions. [2021-08-21 12:32:30,728 INFO L78 Accepts]: Start accepts. Automaton has 50454 states and 110693 transitions. Word has length 56 [2021-08-21 12:32:30,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:30,728 INFO L470 AbstractCegarLoop]: Abstraction has 50454 states and 110693 transitions. [2021-08-21 12:32:30,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 50454 states and 110693 transitions. [2021-08-21 12:32:30,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:32:30,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:30,759 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:30,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:30,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:30,973 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:30,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1750056034, now seen corresponding path program 67 times [2021-08-21 12:32:30,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:30,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610676789] [2021-08-21 12:32:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:30,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:31,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:31,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610676789] [2021-08-21 12:32:31,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610676789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:31,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222429659] [2021-08-21 12:32:31,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:32:31,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:31,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:31,202 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) [2021-08-21 12:32:31,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 12:32:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:32,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:32:32,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:32,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222429659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:32,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:32,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:32:32,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183280669] [2021-08-21 12:32:32,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:32:32,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:32,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:32:32,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:32:32,665 INFO L87 Difference]: Start difference. First operand 50454 states and 110693 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:32,947 INFO L93 Difference]: Finished difference Result 56662 states and 123166 transitions. [2021-08-21 12:32:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:32:32,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:32:32,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:33,041 INFO L225 Difference]: With dead ends: 56662 [2021-08-21 12:32:33,041 INFO L226 Difference]: Without dead ends: 56662 [2021-08-21 12:32:33,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:32:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56662 states. [2021-08-21 12:32:33,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56662 to 50614. [2021-08-21 12:32:33,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50614 states, 50613 states have (on average 2.1933692924742654) internal successors, (111013), 50613 states have internal predecessors, (111013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:34,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50614 states to 50614 states and 111013 transitions. [2021-08-21 12:32:34,030 INFO L78 Accepts]: Start accepts. Automaton has 50614 states and 111013 transitions. Word has length 56 [2021-08-21 12:32:34,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:34,030 INFO L470 AbstractCegarLoop]: Abstraction has 50614 states and 111013 transitions. [2021-08-21 12:32:34,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:34,030 INFO L276 IsEmpty]: Start isEmpty. Operand 50614 states and 111013 transitions. [2021-08-21 12:32:34,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:32:34,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:34,063 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:34,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:34,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:34,276 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:34,276 INFO L82 PathProgramCache]: Analyzing trace with hash 683439996, now seen corresponding path program 68 times [2021-08-21 12:32:34,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:34,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575003564] [2021-08-21 12:32:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:34,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:34,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:34,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575003564] [2021-08-21 12:32:34,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575003564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:34,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827892773] [2021-08-21 12:32:34,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:32:34,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:34,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:34,336 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) [2021-08-21 12:32:34,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 12:32:35,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:32:35,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:35,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:32:35,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:35,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827892773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:35,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:35,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 12:32:35,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826411527] [2021-08-21 12:32:35,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:32:35,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:35,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:32:35,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:32:35,830 INFO L87 Difference]: Start difference. First operand 50614 states and 111013 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:36,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:36,137 INFO L93 Difference]: Finished difference Result 54674 states and 118916 transitions. [2021-08-21 12:32:36,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:32:36,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:32:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:36,339 INFO L225 Difference]: With dead ends: 54674 [2021-08-21 12:32:36,339 INFO L226 Difference]: Without dead ends: 54674 [2021-08-21 12:32:36,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:32:36,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54674 states. [2021-08-21 12:32:36,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54674 to 50774. [2021-08-21 12:32:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50774 states, 50773 states have (on average 2.192759931459634) internal successors, (111333), 50773 states have internal predecessors, (111333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50774 states to 50774 states and 111333 transitions. [2021-08-21 12:32:37,148 INFO L78 Accepts]: Start accepts. Automaton has 50774 states and 111333 transitions. Word has length 56 [2021-08-21 12:32:37,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:37,148 INFO L470 AbstractCegarLoop]: Abstraction has 50774 states and 111333 transitions. [2021-08-21 12:32:37,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 50774 states and 111333 transitions. [2021-08-21 12:32:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 12:32:37,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:37,183 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:37,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:37,402 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,SelfDestructingSolverStorable80 [2021-08-21 12:32:37,402 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:37,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:37,402 INFO L82 PathProgramCache]: Analyzing trace with hash 958417566, now seen corresponding path program 69 times [2021-08-21 12:32:37,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:37,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691984948] [2021-08-21 12:32:37,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:37,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:37,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:37,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691984948] [2021-08-21 12:32:37,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691984948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:37,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375984959] [2021-08-21 12:32:37,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:32:37,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:37,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:37,469 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) [2021-08-21 12:32:37,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 12:32:38,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 12:32:38,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:38,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:32:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:39,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375984959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:39,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:39,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:32:39,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484742840] [2021-08-21 12:32:39,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:32:39,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:39,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:32:39,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:32:39,124 INFO L87 Difference]: Start difference. First operand 50774 states and 111333 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:39,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:39,492 INFO L93 Difference]: Finished difference Result 52880 states and 115293 transitions. [2021-08-21 12:32:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:32:39,492 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 12:32:39,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:39,581 INFO L225 Difference]: With dead ends: 52880 [2021-08-21 12:32:39,581 INFO L226 Difference]: Without dead ends: 52880 [2021-08-21 12:32:39,581 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:32:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52880 states. [2021-08-21 12:32:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52880 to 49354. [2021-08-21 12:32:40,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49354 states, 49353 states have (on average 2.193686300731465) internal successors, (108265), 49353 states have internal predecessors, (108265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49354 states to 49354 states and 108265 transitions. [2021-08-21 12:32:40,308 INFO L78 Accepts]: Start accepts. Automaton has 49354 states and 108265 transitions. Word has length 56 [2021-08-21 12:32:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:40,308 INFO L470 AbstractCegarLoop]: Abstraction has 49354 states and 108265 transitions. [2021-08-21 12:32:40,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 49354 states and 108265 transitions. [2021-08-21 12:32:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:32:40,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:40,355 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:40,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:40,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:40,574 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:40,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1672291054, now seen corresponding path program 70 times [2021-08-21 12:32:40,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:40,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553875553] [2021-08-21 12:32:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:40,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:40,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:40,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553875553] [2021-08-21 12:32:40,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553875553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:40,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358842562] [2021-08-21 12:32:40,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:32:40,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:40,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:40,662 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) [2021-08-21 12:32:40,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 12:32:42,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:32:42,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:42,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:32:42,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:42,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358842562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:42,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:42,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 12:32:42,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590646351] [2021-08-21 12:32:42,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:32:42,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:42,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:32:42,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:32:42,363 INFO L87 Difference]: Start difference. First operand 49354 states and 108265 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:42,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:42,739 INFO L93 Difference]: Finished difference Result 55302 states and 120443 transitions. [2021-08-21 12:32:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:32:42,741 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:32:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:42,834 INFO L225 Difference]: With dead ends: 55302 [2021-08-21 12:32:42,835 INFO L226 Difference]: Without dead ends: 55302 [2021-08-21 12:32:42,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:32:42,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55302 states. [2021-08-21 12:32:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55302 to 49998. [2021-08-21 12:32:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49998 states, 49997 states have (on average 2.195831749904994) internal successors, (109785), 49997 states have internal predecessors, (109785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:43,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49998 states to 49998 states and 109785 transitions. [2021-08-21 12:32:43,791 INFO L78 Accepts]: Start accepts. Automaton has 49998 states and 109785 transitions. Word has length 66 [2021-08-21 12:32:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:43,791 INFO L470 AbstractCegarLoop]: Abstraction has 49998 states and 109785 transitions. [2021-08-21 12:32:43,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:43,791 INFO L276 IsEmpty]: Start isEmpty. Operand 49998 states and 109785 transitions. [2021-08-21 12:32:43,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:32:43,835 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:43,835 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:43,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-21 12:32:44,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:44,050 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:44,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:44,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1266268076, now seen corresponding path program 71 times [2021-08-21 12:32:44,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:44,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938636246] [2021-08-21 12:32:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:44,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:44,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:44,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938636246] [2021-08-21 12:32:44,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938636246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:44,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669806006] [2021-08-21 12:32:44,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:32:44,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:44,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:44,152 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) [2021-08-21 12:32:44,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 12:32:45,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:32:45,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:45,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:32:45,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:45,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669806006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:45,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:45,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:32:45,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444132882] [2021-08-21 12:32:45,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:32:45,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:45,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:32:45,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:32:45,721 INFO L87 Difference]: Start difference. First operand 49998 states and 109785 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:46,013 INFO L93 Difference]: Finished difference Result 51084 states and 111615 transitions. [2021-08-21 12:32:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:32:46,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:32:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:46,114 INFO L225 Difference]: With dead ends: 51084 [2021-08-21 12:32:46,115 INFO L226 Difference]: Without dead ends: 51076 [2021-08-21 12:32:46,115 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:32:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51076 states. [2021-08-21 12:32:47,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51076 to 49894. [2021-08-21 12:32:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49894 states, 49893 states have (on average 2.193995149620187) internal successors, (109465), 49893 states have internal predecessors, (109465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49894 states to 49894 states and 109465 transitions. [2021-08-21 12:32:47,152 INFO L78 Accepts]: Start accepts. Automaton has 49894 states and 109465 transitions. Word has length 66 [2021-08-21 12:32:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:47,152 INFO L470 AbstractCegarLoop]: Abstraction has 49894 states and 109465 transitions. [2021-08-21 12:32:47,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:47,152 INFO L276 IsEmpty]: Start isEmpty. Operand 49894 states and 109465 transitions. [2021-08-21 12:32:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:32:47,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:47,205 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:47,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:47,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:47,419 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:47,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:47,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1732185278, now seen corresponding path program 72 times [2021-08-21 12:32:47,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:47,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129071302] [2021-08-21 12:32:47,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:47,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:47,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:47,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129071302] [2021-08-21 12:32:47,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129071302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:47,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139850701] [2021-08-21 12:32:47,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:32:47,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:47,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:47,484 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) [2021-08-21 12:32:47,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 12:32:49,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:32:49,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:49,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:32:49,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:49,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139850701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:49,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:49,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:32:49,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529866098] [2021-08-21 12:32:49,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:32:49,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:49,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:32:49,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:32:49,241 INFO L87 Difference]: Start difference. First operand 49894 states and 109465 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:49,655 INFO L93 Difference]: Finished difference Result 58739 states and 127815 transitions. [2021-08-21 12:32:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:32:49,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:32:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:49,763 INFO L225 Difference]: With dead ends: 58739 [2021-08-21 12:32:49,763 INFO L226 Difference]: Without dead ends: 58739 [2021-08-21 12:32:49,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:32:49,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58739 states. [2021-08-21 12:32:50,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58739 to 53954. [2021-08-21 12:32:50,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53954 states, 53953 states have (on average 2.204678145793561) internal successors, (118949), 53953 states have internal predecessors, (118949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53954 states to 53954 states and 118949 transitions. [2021-08-21 12:32:50,690 INFO L78 Accepts]: Start accepts. Automaton has 53954 states and 118949 transitions. Word has length 66 [2021-08-21 12:32:50,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:50,690 INFO L470 AbstractCegarLoop]: Abstraction has 53954 states and 118949 transitions. [2021-08-21 12:32:50,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 53954 states and 118949 transitions. [2021-08-21 12:32:50,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:32:50,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:50,745 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:50,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:50,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-21 12:32:50,954 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:50,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:50,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1392726018, now seen corresponding path program 73 times [2021-08-21 12:32:50,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:50,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093160990] [2021-08-21 12:32:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:50,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:51,253 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:51,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:51,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093160990] [2021-08-21 12:32:51,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093160990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:51,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149398309] [2021-08-21 12:32:51,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:32:51,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:51,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:51,254 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) [2021-08-21 12:32:51,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 12:32:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:52,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:32:52,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:32:52,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149398309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:52,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:52,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:32:52,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846336879] [2021-08-21 12:32:52,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:32:52,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:52,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:32:52,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:32:52,854 INFO L87 Difference]: Start difference. First operand 53954 states and 118949 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:53,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:53,136 INFO L93 Difference]: Finished difference Result 56467 states and 123155 transitions. [2021-08-21 12:32:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:32:53,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:32:53,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:53,236 INFO L225 Difference]: With dead ends: 56467 [2021-08-21 12:32:53,236 INFO L226 Difference]: Without dead ends: 56375 [2021-08-21 12:32:53,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:32:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56375 states. [2021-08-21 12:32:54,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56375 to 51614. [2021-08-21 12:32:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.1976827543448354) internal successors, (113429), 51613 states have internal predecessors, (113429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113429 transitions. [2021-08-21 12:32:54,290 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113429 transitions. Word has length 66 [2021-08-21 12:32:54,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:54,290 INFO L470 AbstractCegarLoop]: Abstraction has 51614 states and 113429 transitions. [2021-08-21 12:32:54,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113429 transitions. [2021-08-21 12:32:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:32:54,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:54,341 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:54,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:54,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-21 12:32:54,560 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:54,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:54,560 INFO L82 PathProgramCache]: Analyzing trace with hash 365501412, now seen corresponding path program 74 times [2021-08-21 12:32:54,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:54,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816675847] [2021-08-21 12:32:54,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:54,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:54,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:54,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816675847] [2021-08-21 12:32:54,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816675847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:54,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577380008] [2021-08-21 12:32:54,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:32:54,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:54,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:54,648 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) [2021-08-21 12:32:54,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 12:32:56,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:32:56,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:56,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:32:56,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:32:56,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577380008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:56,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:56,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:32:56,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377359913] [2021-08-21 12:32:56,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:32:56,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:56,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:32:56,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:32:56,367 INFO L87 Difference]: Start difference. First operand 51614 states and 113429 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:32:56,724 INFO L93 Difference]: Finished difference Result 53573 states and 116784 transitions. [2021-08-21 12:32:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:32:56,725 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:32:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:32:56,814 INFO L225 Difference]: With dead ends: 53573 [2021-08-21 12:32:56,814 INFO L226 Difference]: Without dead ends: 53525 [2021-08-21 12:32:56,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:32:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53525 states. [2021-08-21 12:32:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53525 to 51614. [2021-08-21 12:32:57,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.196520256524519) internal successors, (113369), 51613 states have internal predecessors, (113369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113369 transitions. [2021-08-21 12:32:57,648 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113369 transitions. Word has length 66 [2021-08-21 12:32:57,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:32:57,648 INFO L470 AbstractCegarLoop]: Abstraction has 51614 states and 113369 transitions. [2021-08-21 12:32:57,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:32:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113369 transitions. [2021-08-21 12:32:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:32:57,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:32:57,698 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:32:57,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 12:32:57,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-21 12:32:57,917 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:32:57,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:32:57,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1861779310, now seen corresponding path program 75 times [2021-08-21 12:32:57,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:32:57,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429550530] [2021-08-21 12:32:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:32:57,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:32:57,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:32:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:32:57,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:32:57,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429550530] [2021-08-21 12:32:57,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429550530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:57,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910575476] [2021-08-21 12:32:57,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:32:57,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:32:57,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:32:57,970 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) [2021-08-21 12:32:57,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 12:32:59,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:32:59,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:32:59,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:32:59,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:32:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:32:59,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910575476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:32:59,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:32:59,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:32:59,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827195351] [2021-08-21 12:32:59,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:32:59,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:32:59,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:32:59,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:32:59,855 INFO L87 Difference]: Start difference. First operand 51614 states and 113369 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:00,123 INFO L93 Difference]: Finished difference Result 66038 states and 143412 transitions. [2021-08-21 12:33:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:33:00,123 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:00,235 INFO L225 Difference]: With dead ends: 66038 [2021-08-21 12:33:00,235 INFO L226 Difference]: Without dead ends: 66011 [2021-08-21 12:33:00,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:33:00,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66011 states. [2021-08-21 12:33:01,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66011 to 55054. [2021-08-21 12:33:01,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55054 states, 55053 states have (on average 2.1976822334840973) internal successors, (120989), 55053 states have internal predecessors, (120989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55054 states to 55054 states and 120989 transitions. [2021-08-21 12:33:01,251 INFO L78 Accepts]: Start accepts. Automaton has 55054 states and 120989 transitions. Word has length 66 [2021-08-21 12:33:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:01,251 INFO L470 AbstractCegarLoop]: Abstraction has 55054 states and 120989 transitions. [2021-08-21 12:33:01,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:01,251 INFO L276 IsEmpty]: Start isEmpty. Operand 55054 states and 120989 transitions. [2021-08-21 12:33:01,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:01,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:01,300 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:01,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:01,520 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,SelfDestructingSolverStorable87 [2021-08-21 12:33:01,520 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:01,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1575456100, now seen corresponding path program 76 times [2021-08-21 12:33:01,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:01,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158780613] [2021-08-21 12:33:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:01,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:01,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:01,569 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:01,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:01,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158780613] [2021-08-21 12:33:01,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158780613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:01,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48035789] [2021-08-21 12:33:01,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:33:01,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:01,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:01,570 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) [2021-08-21 12:33:01,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 12:33:03,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:33:03,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:03,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:03,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:03,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48035789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:03,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:03,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:33:03,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759958210] [2021-08-21 12:33:03,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:33:03,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:03,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:33:03,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:33:03,313 INFO L87 Difference]: Start difference. First operand 55054 states and 120989 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:03,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:03,670 INFO L93 Difference]: Finished difference Result 64613 states and 140751 transitions. [2021-08-21 12:33:03,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:33:03,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:03,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:03,787 INFO L225 Difference]: With dead ends: 64613 [2021-08-21 12:33:03,787 INFO L226 Difference]: Without dead ends: 64613 [2021-08-21 12:33:03,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:33:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64613 states. [2021-08-21 12:33:04,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64613 to 59214. [2021-08-21 12:33:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59214 states, 59213 states have (on average 2.2070322395419923) internal successors, (130685), 59213 states have internal predecessors, (130685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:04,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59214 states to 59214 states and 130685 transitions. [2021-08-21 12:33:04,933 INFO L78 Accepts]: Start accepts. Automaton has 59214 states and 130685 transitions. Word has length 66 [2021-08-21 12:33:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:04,933 INFO L470 AbstractCegarLoop]: Abstraction has 59214 states and 130685 transitions. [2021-08-21 12:33:04,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:04,934 INFO L276 IsEmpty]: Start isEmpty. Operand 59214 states and 130685 transitions. [2021-08-21 12:33:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:04,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:04,984 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:05,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:05,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:05,203 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:05,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:05,203 INFO L82 PathProgramCache]: Analyzing trace with hash -405400100, now seen corresponding path program 77 times [2021-08-21 12:33:05,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:05,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70638955] [2021-08-21 12:33:05,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:05,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:05,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:05,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70638955] [2021-08-21 12:33:05,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70638955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:05,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360038633] [2021-08-21 12:33:05,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:33:05,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:05,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:05,254 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) [2021-08-21 12:33:05,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 12:33:06,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:33:06,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:06,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:06,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:07,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360038633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:07,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:07,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:33:07,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256049611] [2021-08-21 12:33:07,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:33:07,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:07,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:33:07,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:33:07,074 INFO L87 Difference]: Start difference. First operand 59214 states and 130685 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:07,431 INFO L93 Difference]: Finished difference Result 61966 states and 135259 transitions. [2021-08-21 12:33:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:33:07,431 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:07,531 INFO L225 Difference]: With dead ends: 61966 [2021-08-21 12:33:07,531 INFO L226 Difference]: Without dead ends: 61870 [2021-08-21 12:33:07,531 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:33:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61870 states. [2021-08-21 12:33:08,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61870 to 56914. [2021-08-21 12:33:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56914 states, 56913 states have (on average 2.2002178764078506) internal successors, (125221), 56913 states have internal predecessors, (125221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56914 states to 56914 states and 125221 transitions. [2021-08-21 12:33:08,433 INFO L78 Accepts]: Start accepts. Automaton has 56914 states and 125221 transitions. Word has length 66 [2021-08-21 12:33:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:08,434 INFO L470 AbstractCegarLoop]: Abstraction has 56914 states and 125221 transitions. [2021-08-21 12:33:08,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:08,434 INFO L276 IsEmpty]: Start isEmpty. Operand 56914 states and 125221 transitions. [2021-08-21 12:33:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:08,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:08,722 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:08,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:08,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:08,942 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:08,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:08,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1352827330, now seen corresponding path program 78 times [2021-08-21 12:33:08,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:08,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013564578] [2021-08-21 12:33:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:08,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:08,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:08,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013564578] [2021-08-21 12:33:08,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013564578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:08,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542690187] [2021-08-21 12:33:08,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:33:08,997 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:08,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:09,013 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) [2021-08-21 12:33:09,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 12:33:10,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:33:10,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:10,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542690187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:10,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:10,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:33:10,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178802075] [2021-08-21 12:33:10,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:33:10,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:10,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:33:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:33:10,835 INFO L87 Difference]: Start difference. First operand 56914 states and 125221 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:11,254 INFO L93 Difference]: Finished difference Result 59554 states and 129655 transitions. [2021-08-21 12:33:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:33:11,255 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:11,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:11,347 INFO L225 Difference]: With dead ends: 59554 [2021-08-21 12:33:11,347 INFO L226 Difference]: Without dead ends: 59458 [2021-08-21 12:33:11,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:33:11,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59458 states. [2021-08-21 12:33:11,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59458 to 56894. [2021-08-21 12:33:12,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56894 states, 56893 states have (on average 2.1983548063909444) internal successors, (125071), 56893 states have internal predecessors, (125071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56894 states to 56894 states and 125071 transitions. [2021-08-21 12:33:12,153 INFO L78 Accepts]: Start accepts. Automaton has 56894 states and 125071 transitions. Word has length 66 [2021-08-21 12:33:12,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:12,153 INFO L470 AbstractCegarLoop]: Abstraction has 56894 states and 125071 transitions. [2021-08-21 12:33:12,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:12,153 INFO L276 IsEmpty]: Start isEmpty. Operand 56894 states and 125071 transitions. [2021-08-21 12:33:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:12,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:12,201 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:12,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:12,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:12,420 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:12,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1580108516, now seen corresponding path program 79 times [2021-08-21 12:33:12,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:12,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635202447] [2021-08-21 12:33:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:12,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:12,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:12,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635202447] [2021-08-21 12:33:12,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635202447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:12,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504232450] [2021-08-21 12:33:12,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:33:12,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:12,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:12,480 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) [2021-08-21 12:33:12,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 12:33:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:14,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:14,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:14,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504232450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:14,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:14,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 12:33:14,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845672501] [2021-08-21 12:33:14,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:33:14,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:14,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:33:14,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:33:14,414 INFO L87 Difference]: Start difference. First operand 56894 states and 125071 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:14,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:14,752 INFO L93 Difference]: Finished difference Result 59114 states and 128843 transitions. [2021-08-21 12:33:14,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:33:14,753 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:14,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:14,855 INFO L225 Difference]: With dead ends: 59114 [2021-08-21 12:33:14,856 INFO L226 Difference]: Without dead ends: 58982 [2021-08-21 12:33:14,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:33:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58982 states. [2021-08-21 12:33:15,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58982 to 56922. [2021-08-21 12:33:15,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56922 states, 56921 states have (on average 2.1963950036014825) internal successors, (125021), 56921 states have internal predecessors, (125021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56922 states to 56922 states and 125021 transitions. [2021-08-21 12:33:15,740 INFO L78 Accepts]: Start accepts. Automaton has 56922 states and 125021 transitions. Word has length 66 [2021-08-21 12:33:15,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:15,740 INFO L470 AbstractCegarLoop]: Abstraction has 56922 states and 125021 transitions. [2021-08-21 12:33:15,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:15,740 INFO L276 IsEmpty]: Start isEmpty. Operand 56922 states and 125021 transitions. [2021-08-21 12:33:15,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:15,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:15,792 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:15,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-21 12:33:16,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:16,012 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:16,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:16,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1575108242, now seen corresponding path program 80 times [2021-08-21 12:33:16,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:16,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396918746] [2021-08-21 12:33:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:16,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:33:16,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:16,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396918746] [2021-08-21 12:33:16,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396918746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:16,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829302694] [2021-08-21 12:33:16,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:33:16,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:16,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:16,064 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) [2021-08-21 12:33:16,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 12:33:17,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:33:17,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:17,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:33:18,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829302694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:18,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:18,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:33:18,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182854685] [2021-08-21 12:33:18,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:33:18,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:33:18,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:33:18,012 INFO L87 Difference]: Start difference. First operand 56922 states and 125021 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:18,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:18,276 INFO L93 Difference]: Finished difference Result 69297 states and 150869 transitions. [2021-08-21 12:33:18,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:33:18,277 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:18,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:18,388 INFO L225 Difference]: With dead ends: 69297 [2021-08-21 12:33:18,389 INFO L226 Difference]: Without dead ends: 69270 [2021-08-21 12:33:18,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:33:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69270 states. [2021-08-21 12:33:19,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69270 to 56622. [2021-08-21 12:33:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56622 states, 56621 states have (on average 2.1971529997704033) internal successors, (124405), 56621 states have internal predecessors, (124405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56622 states to 56622 states and 124405 transitions. [2021-08-21 12:33:19,403 INFO L78 Accepts]: Start accepts. Automaton has 56622 states and 124405 transitions. Word has length 66 [2021-08-21 12:33:19,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:19,404 INFO L470 AbstractCegarLoop]: Abstraction has 56622 states and 124405 transitions. [2021-08-21 12:33:19,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 56622 states and 124405 transitions. [2021-08-21 12:33:19,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:19,450 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:19,451 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:19,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:19,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:19,670 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:19,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2136409022, now seen corresponding path program 81 times [2021-08-21 12:33:19,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:19,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994913878] [2021-08-21 12:33:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:19,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:19,719 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:19,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:19,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994913878] [2021-08-21 12:33:19,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994913878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:19,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388482208] [2021-08-21 12:33:19,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:33:19,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:19,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:19,720 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) [2021-08-21 12:33:19,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 12:33:21,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 12:33:21,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:21,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:21,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:21,696 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:21,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388482208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:21,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:21,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:33:21,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526641939] [2021-08-21 12:33:21,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:33:21,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:21,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:33:21,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:33:21,697 INFO L87 Difference]: Start difference. First operand 56622 states and 124405 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:21,966 INFO L93 Difference]: Finished difference Result 67026 states and 146165 transitions. [2021-08-21 12:33:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:33:21,966 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:21,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:22,076 INFO L225 Difference]: With dead ends: 67026 [2021-08-21 12:33:22,076 INFO L226 Difference]: Without dead ends: 67023 [2021-08-21 12:33:22,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:33:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67023 states. [2021-08-21 12:33:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67023 to 62354. [2021-08-21 12:33:22,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62354 states, 62353 states have (on average 2.206229050727311) internal successors, (137565), 62353 states have internal predecessors, (137565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:23,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62354 states to 62354 states and 137565 transitions. [2021-08-21 12:33:23,102 INFO L78 Accepts]: Start accepts. Automaton has 62354 states and 137565 transitions. Word has length 66 [2021-08-21 12:33:23,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:23,102 INFO L470 AbstractCegarLoop]: Abstraction has 62354 states and 137565 transitions. [2021-08-21 12:33:23,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:23,102 INFO L276 IsEmpty]: Start isEmpty. Operand 62354 states and 137565 transitions. [2021-08-21 12:33:23,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:23,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:23,150 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:23,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:23,371 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,SelfDestructingSolverStorable93 [2021-08-21 12:33:23,371 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:23,371 INFO L82 PathProgramCache]: Analyzing trace with hash -988502274, now seen corresponding path program 82 times [2021-08-21 12:33:23,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:23,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757041808] [2021-08-21 12:33:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:23,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:23,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:23,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:23,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757041808] [2021-08-21 12:33:23,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757041808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:23,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229130783] [2021-08-21 12:33:23,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:33:23,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:23,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:23,422 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) [2021-08-21 12:33:23,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 12:33:25,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:33:25,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:25,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:25,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:25,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229130783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:25,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:25,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:33:25,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413620436] [2021-08-21 12:33:25,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:33:25,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:25,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:33:25,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:33:25,421 INFO L87 Difference]: Start difference. First operand 62354 states and 137565 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:25,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:25,707 INFO L93 Difference]: Finished difference Result 65089 states and 142128 transitions. [2021-08-21 12:33:25,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:33:25,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:25,819 INFO L225 Difference]: With dead ends: 65089 [2021-08-21 12:33:25,819 INFO L226 Difference]: Without dead ends: 65029 [2021-08-21 12:33:25,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:33:25,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65029 states. [2021-08-21 12:33:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65029 to 59590. [2021-08-21 12:33:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.20163117353874) internal successors, (131193), 59589 states have internal predecessors, (131193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131193 transitions. [2021-08-21 12:33:26,891 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131193 transitions. Word has length 66 [2021-08-21 12:33:26,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:26,892 INFO L470 AbstractCegarLoop]: Abstraction has 59590 states and 131193 transitions. [2021-08-21 12:33:26,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:26,892 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131193 transitions. [2021-08-21 12:33:26,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:26,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:26,940 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:26,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:27,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-08-21 12:33:27,160 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:27,161 INFO L82 PathProgramCache]: Analyzing trace with hash 769725156, now seen corresponding path program 83 times [2021-08-21 12:33:27,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:27,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345769983] [2021-08-21 12:33:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:27,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:27,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:27,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345769983] [2021-08-21 12:33:27,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345769983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:27,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53019520] [2021-08-21 12:33:27,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:33:27,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:27,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:27,231 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) [2021-08-21 12:33:27,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 12:33:29,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 12:33:29,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:29,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:29,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:29,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53019520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:29,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:29,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:33:29,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677667270] [2021-08-21 12:33:29,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:33:29,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:33:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:33:29,201 INFO L87 Difference]: Start difference. First operand 59590 states and 131193 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:29,499 INFO L93 Difference]: Finished difference Result 62315 states and 135765 transitions. [2021-08-21 12:33:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:33:29,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:29,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:29,632 INFO L225 Difference]: With dead ends: 62315 [2021-08-21 12:33:29,632 INFO L226 Difference]: Without dead ends: 62243 [2021-08-21 12:33:29,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:33:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62243 states. [2021-08-21 12:33:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62243 to 59590. [2021-08-21 12:33:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1996173790464684) internal successors, (131073), 59589 states have internal predecessors, (131073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131073 transitions. [2021-08-21 12:33:30,706 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131073 transitions. Word has length 66 [2021-08-21 12:33:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:30,706 INFO L470 AbstractCegarLoop]: Abstraction has 59590 states and 131073 transitions. [2021-08-21 12:33:30,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131073 transitions. [2021-08-21 12:33:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:30,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:30,760 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:30,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:30,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:30,981 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:30,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:30,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2131756606, now seen corresponding path program 84 times [2021-08-21 12:33:30,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:30,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056283823] [2021-08-21 12:33:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:30,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:31,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:31,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056283823] [2021-08-21 12:33:31,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056283823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:31,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450705687] [2021-08-21 12:33:31,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:33:31,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:31,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:31,051 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) [2021-08-21 12:33:31,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 12:33:33,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 12:33:33,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:33,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:33,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:33,245 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:33,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450705687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:33,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:33,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 12:33:33,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627399833] [2021-08-21 12:33:33,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:33:33,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:33,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:33:33,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:33:33,246 INFO L87 Difference]: Start difference. First operand 59590 states and 131073 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:33,582 INFO L93 Difference]: Finished difference Result 62467 states and 135889 transitions. [2021-08-21 12:33:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:33:33,582 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:33,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:33,701 INFO L225 Difference]: With dead ends: 62467 [2021-08-21 12:33:33,701 INFO L226 Difference]: Without dead ends: 62335 [2021-08-21 12:33:33,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:33:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62335 states. [2021-08-21 12:33:34,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62335 to 59590. [2021-08-21 12:33:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1969323197234387) internal successors, (130913), 59589 states have internal predecessors, (130913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:34,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 130913 transitions. [2021-08-21 12:33:34,857 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 130913 transitions. Word has length 66 [2021-08-21 12:33:34,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:34,857 INFO L470 AbstractCegarLoop]: Abstraction has 59590 states and 130913 transitions. [2021-08-21 12:33:34,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 130913 transitions. [2021-08-21 12:33:34,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:34,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:34,910 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:34,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:35,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:35,125 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash 537043748, now seen corresponding path program 85 times [2021-08-21 12:33:35,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:35,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867346878] [2021-08-21 12:33:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:35,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:35,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:35,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867346878] [2021-08-21 12:33:35,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867346878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:35,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835230515] [2021-08-21 12:33:35,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:33:35,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:35,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:35,192 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) [2021-08-21 12:33:35,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 12:33:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:37,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:37,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:33:37,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835230515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:37,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:37,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:33:37,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418390860] [2021-08-21 12:33:37,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:33:37,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:37,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:33:37,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:33:37,266 INFO L87 Difference]: Start difference. First operand 59590 states and 130913 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:37,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:37,628 INFO L93 Difference]: Finished difference Result 62011 states and 135009 transitions. [2021-08-21 12:33:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:33:37,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:37,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:37,742 INFO L225 Difference]: With dead ends: 62011 [2021-08-21 12:33:37,742 INFO L226 Difference]: Without dead ends: 61819 [2021-08-21 12:33:37,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:33:37,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61819 states. [2021-08-21 12:33:38,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61819 to 59670. [2021-08-21 12:33:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59670 states, 59669 states have (on average 2.193383498969314) internal successors, (130877), 59669 states have internal predecessors, (130877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59670 states to 59670 states and 130877 transitions. [2021-08-21 12:33:38,756 INFO L78 Accepts]: Start accepts. Automaton has 59670 states and 130877 transitions. Word has length 66 [2021-08-21 12:33:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:38,756 INFO L470 AbstractCegarLoop]: Abstraction has 59670 states and 130877 transitions. [2021-08-21 12:33:38,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 59670 states and 130877 transitions. [2021-08-21 12:33:38,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:38,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:38,805 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:38,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 12:33:39,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:39,016 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:39,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1326337746, now seen corresponding path program 86 times [2021-08-21 12:33:39,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:39,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869897753] [2021-08-21 12:33:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:39,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:33:39,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:39,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869897753] [2021-08-21 12:33:39,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869897753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:39,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723934533] [2021-08-21 12:33:39,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:33:39,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:39,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:39,094 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) [2021-08-21 12:33:39,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 12:33:41,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:33:41,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:41,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:41,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:33:41,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723934533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:41,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:41,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 12:33:41,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733060218] [2021-08-21 12:33:41,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:33:41,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:41,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:33:41,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:33:41,167 INFO L87 Difference]: Start difference. First operand 59670 states and 130877 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:41,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:41,478 INFO L93 Difference]: Finished difference Result 65831 states and 143283 transitions. [2021-08-21 12:33:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:33:41,479 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:41,600 INFO L225 Difference]: With dead ends: 65831 [2021-08-21 12:33:41,601 INFO L226 Difference]: Without dead ends: 65774 [2021-08-21 12:33:41,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:33:41,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65774 states. [2021-08-21 12:33:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65774 to 55516. [2021-08-21 12:33:42,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55516 states, 55515 states have (on average 2.1908132937044043) internal successors, (121623), 55515 states have internal predecessors, (121623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:42,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55516 states to 55516 states and 121623 transitions. [2021-08-21 12:33:42,659 INFO L78 Accepts]: Start accepts. Automaton has 55516 states and 121623 transitions. Word has length 66 [2021-08-21 12:33:42,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:42,659 INFO L470 AbstractCegarLoop]: Abstraction has 55516 states and 121623 transitions. [2021-08-21 12:33:42,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:42,659 INFO L276 IsEmpty]: Start isEmpty. Operand 55516 states and 121623 transitions. [2021-08-21 12:33:42,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:42,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:42,711 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:42,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:42,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:42,925 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:42,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1124522532, now seen corresponding path program 87 times [2021-08-21 12:33:42,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:42,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132168487] [2021-08-21 12:33:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:42,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:43,005 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 12:33:43,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:43,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132168487] [2021-08-21 12:33:43,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132168487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:43,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57485291] [2021-08-21 12:33:43,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:33:43,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:43,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:43,007 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) [2021-08-21 12:33:43,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 12:33:44,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 12:33:44,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:44,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:44,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 12:33:45,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57485291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:45,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:45,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:33:45,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493264847] [2021-08-21 12:33:45,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:33:45,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:45,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:33:45,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:33:45,153 INFO L87 Difference]: Start difference. First operand 55516 states and 121623 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:45,455 INFO L93 Difference]: Finished difference Result 61581 states and 133847 transitions. [2021-08-21 12:33:45,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:33:45,458 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:45,578 INFO L225 Difference]: With dead ends: 61581 [2021-08-21 12:33:45,578 INFO L226 Difference]: Without dead ends: 61554 [2021-08-21 12:33:45,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:33:45,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61554 states. [2021-08-21 12:33:46,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61554 to 54860. [2021-08-21 12:33:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54860 states, 54859 states have (on average 2.1912721704733955) internal successors, (120211), 54859 states have internal predecessors, (120211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54860 states to 54860 states and 120211 transitions. [2021-08-21 12:33:46,656 INFO L78 Accepts]: Start accepts. Automaton has 54860 states and 120211 transitions. Word has length 66 [2021-08-21 12:33:46,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:46,656 INFO L470 AbstractCegarLoop]: Abstraction has 54860 states and 120211 transitions. [2021-08-21 12:33:46,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:46,656 INFO L276 IsEmpty]: Start isEmpty. Operand 54860 states and 120211 transitions. [2021-08-21 12:33:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:46,704 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:46,704 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:46,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:46,925 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,SelfDestructingSolverStorable99 [2021-08-21 12:33:46,925 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:46,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1772556142, now seen corresponding path program 88 times [2021-08-21 12:33:46,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:46,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857016482] [2021-08-21 12:33:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:46,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:33:46,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:46,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857016482] [2021-08-21 12:33:46,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857016482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:46,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532372469] [2021-08-21 12:33:46,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:33:46,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:46,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:46,976 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) [2021-08-21 12:33:46,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 12:33:48,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:33:48,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-21 12:33:49,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532372469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:49,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:49,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:33:49,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937949084] [2021-08-21 12:33:49,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:33:49,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:49,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:33:49,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:33:49,051 INFO L87 Difference]: Start difference. First operand 54860 states and 120211 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:49,339 INFO L93 Difference]: Finished difference Result 62633 states and 136579 transitions. [2021-08-21 12:33:49,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 12:33:49,340 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:49,461 INFO L225 Difference]: With dead ends: 62633 [2021-08-21 12:33:49,461 INFO L226 Difference]: Without dead ends: 62630 [2021-08-21 12:33:49,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:33:49,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62630 states. [2021-08-21 12:33:50,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62630 to 56940. [2021-08-21 12:33:50,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56940 states, 56939 states have (on average 2.195525035564376) internal successors, (125011), 56939 states have internal predecessors, (125011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56940 states to 56940 states and 125011 transitions. [2021-08-21 12:33:50,789 INFO L78 Accepts]: Start accepts. Automaton has 56940 states and 125011 transitions. Word has length 66 [2021-08-21 12:33:50,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:50,789 INFO L470 AbstractCegarLoop]: Abstraction has 56940 states and 125011 transitions. [2021-08-21 12:33:50,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 56940 states and 125011 transitions. [2021-08-21 12:33:50,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:50,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:50,842 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:50,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:51,060 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,SelfDestructingSolverStorable100 [2021-08-21 12:33:51,060 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:51,061 INFO L82 PathProgramCache]: Analyzing trace with hash 399059996, now seen corresponding path program 89 times [2021-08-21 12:33:51,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:51,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383702394] [2021-08-21 12:33:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:51,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:51,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:51,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383702394] [2021-08-21 12:33:51,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383702394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:51,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209842017] [2021-08-21 12:33:51,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:33:51,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:51,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:51,112 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) [2021-08-21 12:33:51,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 12:33:53,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 12:33:53,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:53,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 12:33:53,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:53,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209842017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:53,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:53,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-21 12:33:53,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587905359] [2021-08-21 12:33:53,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:33:53,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:53,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:33:53,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:33:53,342 INFO L87 Difference]: Start difference. First operand 56940 states and 125011 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:53,621 INFO L93 Difference]: Finished difference Result 66890 states and 145747 transitions. [2021-08-21 12:33:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:33:53,622 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:53,744 INFO L225 Difference]: With dead ends: 66890 [2021-08-21 12:33:53,744 INFO L226 Difference]: Without dead ends: 66890 [2021-08-21 12:33:53,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:33:53,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66890 states. [2021-08-21 12:33:54,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66890 to 62652. [2021-08-21 12:33:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62652 states, 62651 states have (on average 2.2049288917974175) internal successors, (138141), 62651 states have internal predecessors, (138141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62652 states to 62652 states and 138141 transitions. [2021-08-21 12:33:54,933 INFO L78 Accepts]: Start accepts. Automaton has 62652 states and 138141 transitions. Word has length 66 [2021-08-21 12:33:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:33:54,934 INFO L470 AbstractCegarLoop]: Abstraction has 62652 states and 138141 transitions. [2021-08-21 12:33:54,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 62652 states and 138141 transitions. [2021-08-21 12:33:54,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:33:54,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:33:54,991 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:33:55,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 12:33:55,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-21 12:33:55,195 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:33:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:33:55,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1569115996, now seen corresponding path program 90 times [2021-08-21 12:33:55,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:33:55,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463292025] [2021-08-21 12:33:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:33:55,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:33:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:33:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:33:55,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:33:55,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463292025] [2021-08-21 12:33:55,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463292025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:55,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007159457] [2021-08-21 12:33:55,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:33:55,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:33:55,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:33:55,254 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) [2021-08-21 12:33:55,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 12:33:57,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 12:33:57,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:33:57,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-21 12:33:57,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:33:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 27 proven. 74 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-21 12:33:57,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007159457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:33:57,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:33:57,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-21 12:33:57,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738260208] [2021-08-21 12:33:57,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:33:57,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:33:57,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:33:57,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:33:57,500 INFO L87 Difference]: Start difference. First operand 62652 states and 138141 transitions. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:33:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:33:58,764 INFO L93 Difference]: Finished difference Result 90468 states and 195554 transitions. [2021-08-21 12:33:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 12:33:58,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:33:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:33:58,913 INFO L225 Difference]: With dead ends: 90468 [2021-08-21 12:33:58,913 INFO L226 Difference]: Without dead ends: 90440 [2021-08-21 12:33:58,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 547.4ms TimeCoverageRelationStatistics Valid=788, Invalid=4182, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 12:33:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90440 states. [2021-08-21 12:34:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90440 to 64804. [2021-08-21 12:34:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2016727620634846) internal successors, (142675), 64803 states have internal predecessors, (142675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142675 transitions. [2021-08-21 12:34:00,325 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142675 transitions. Word has length 66 [2021-08-21 12:34:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:00,325 INFO L470 AbstractCegarLoop]: Abstraction has 64804 states and 142675 transitions. [2021-08-21 12:34:00,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142675 transitions. [2021-08-21 12:34:00,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:34:00,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:00,383 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:00,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:00,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 12:34:00,589 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:00,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:00,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1206622333, now seen corresponding path program 91 times [2021-08-21 12:34:00,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:00,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974767255] [2021-08-21 12:34:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:00,590 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:34:00,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:00,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974767255] [2021-08-21 12:34:00,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974767255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:00,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548261946] [2021-08-21 12:34:00,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:34:00,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:00,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:00,698 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) [2021-08-21 12:34:00,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 12:34:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:02,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:34:02,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:34:02,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548261946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:02,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:02,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-08-21 12:34:02,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872514095] [2021-08-21 12:34:02,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:34:02,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:02,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:34:02,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:34:02,893 INFO L87 Difference]: Start difference. First operand 64804 states and 142675 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:03,186 INFO L93 Difference]: Finished difference Result 71842 states and 157251 transitions. [2021-08-21 12:34:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:34:03,186 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:34:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:03,315 INFO L225 Difference]: With dead ends: 71842 [2021-08-21 12:34:03,316 INFO L226 Difference]: Without dead ends: 71794 [2021-08-21 12:34:03,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:34:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71794 states. [2021-08-21 12:34:04,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71794 to 64804. [2021-08-21 12:34:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2010555066895052) internal successors, (142635), 64803 states have internal predecessors, (142635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:04,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142635 transitions. [2021-08-21 12:34:04,681 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142635 transitions. Word has length 66 [2021-08-21 12:34:04,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:04,681 INFO L470 AbstractCegarLoop]: Abstraction has 64804 states and 142635 transitions. [2021-08-21 12:34:04,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142635 transitions. [2021-08-21 12:34:04,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:34:04,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:04,729 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:04,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 12:34:04,949 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,SelfDestructingSolverStorable103 [2021-08-21 12:34:04,950 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:04,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:04,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1696732579, now seen corresponding path program 92 times [2021-08-21 12:34:04,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:04,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546791490] [2021-08-21 12:34:04,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:04,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 52 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:34:05,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:05,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546791490] [2021-08-21 12:34:05,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546791490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:05,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379476300] [2021-08-21 12:34:05,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:34:05,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:05,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:05,021 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) [2021-08-21 12:34:05,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 12:34:06,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:34:06,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:34:06,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-21 12:34:07,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379476300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:07,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:07,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-08-21 12:34:07,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397348057] [2021-08-21 12:34:07,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:34:07,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:07,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:34:07,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:34:07,070 INFO L87 Difference]: Start difference. First operand 64804 states and 142635 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:07,440 INFO L93 Difference]: Finished difference Result 72032 states and 157512 transitions. [2021-08-21 12:34:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 12:34:07,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:34:07,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:07,561 INFO L225 Difference]: With dead ends: 72032 [2021-08-21 12:34:07,561 INFO L226 Difference]: Without dead ends: 71944 [2021-08-21 12:34:07,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:34:07,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71944 states. [2021-08-21 12:34:08,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71944 to 66864. [2021-08-21 12:34:08,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66864 states, 66863 states have (on average 2.2050910069844307) internal successors, (147439), 66863 states have internal predecessors, (147439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66864 states to 66864 states and 147439 transitions. [2021-08-21 12:34:08,792 INFO L78 Accepts]: Start accepts. Automaton has 66864 states and 147439 transitions. Word has length 66 [2021-08-21 12:34:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:08,792 INFO L470 AbstractCegarLoop]: Abstraction has 66864 states and 147439 transitions. [2021-08-21 12:34:08,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 66864 states and 147439 transitions. [2021-08-21 12:34:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-21 12:34:08,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:08,843 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:08,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:09,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:09,049 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:09,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:09,049 INFO L82 PathProgramCache]: Analyzing trace with hash -892168253, now seen corresponding path program 93 times [2021-08-21 12:34:09,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:09,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397929887] [2021-08-21 12:34:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:09,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 62 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:34:09,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:09,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397929887] [2021-08-21 12:34:09,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397929887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:09,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385773126] [2021-08-21 12:34:09,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:34:09,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:09,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:09,148 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) [2021-08-21 12:34:09,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 12:34:11,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 12:34:11,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:11,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:34:11,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-21 12:34:11,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385773126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:11,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:11,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-08-21 12:34:11,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473090670] [2021-08-21 12:34:11,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 12:34:11,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:11,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 12:34:11,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:34:11,568 INFO L87 Difference]: Start difference. First operand 66864 states and 147439 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:13,419 INFO L93 Difference]: Finished difference Result 139029 states and 299640 transitions. [2021-08-21 12:34:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-21 12:34:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-21 12:34:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:13,772 INFO L225 Difference]: With dead ends: 139029 [2021-08-21 12:34:13,773 INFO L226 Difference]: Without dead ends: 138261 [2021-08-21 12:34:13,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3539 ImplicationChecksByTransitivity, 883.4ms TimeCoverageRelationStatistics Valid=961, Invalid=9139, Unknown=0, NotChecked=0, Total=10100 [2021-08-21 12:34:13,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138261 states. [2021-08-21 12:34:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138261 to 102720. [2021-08-21 12:34:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102720 states, 102719 states have (on average 2.1767637924824035) internal successors, (223595), 102719 states have internal predecessors, (223595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102720 states to 102720 states and 223595 transitions. [2021-08-21 12:34:16,482 INFO L78 Accepts]: Start accepts. Automaton has 102720 states and 223595 transitions. Word has length 66 [2021-08-21 12:34:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:16,482 INFO L470 AbstractCegarLoop]: Abstraction has 102720 states and 223595 transitions. [2021-08-21 12:34:16,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 102720 states and 223595 transitions. [2021-08-21 12:34:16,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:34:16,594 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:16,594 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:16,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-21 12:34:16,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:16,816 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:16,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:16,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1433672430, now seen corresponding path program 94 times [2021-08-21 12:34:16,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:16,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047239629] [2021-08-21 12:34:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:16,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:17,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:17,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047239629] [2021-08-21 12:34:17,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047239629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:17,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666677899] [2021-08-21 12:34:17,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:34:17,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:17,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:17,443 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) [2021-08-21 12:34:17,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 12:34:19,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:34:19,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:19,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:34:19,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:19,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666677899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:19,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:19,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-21 12:34:19,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095305063] [2021-08-21 12:34:19,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:34:19,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:19,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:34:19,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:34:19,532 INFO L87 Difference]: Start difference. First operand 102720 states and 223595 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:20,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:20,208 INFO L93 Difference]: Finished difference Result 133769 states and 293050 transitions. [2021-08-21 12:34:20,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 12:34:20,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:34:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:20,473 INFO L225 Difference]: With dead ends: 133769 [2021-08-21 12:34:20,474 INFO L226 Difference]: Without dead ends: 133551 [2021-08-21 12:34:20,474 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-08-21 12:34:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133551 states. [2021-08-21 12:34:22,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133551 to 130358. [2021-08-21 12:34:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130358 states, 130357 states have (on average 2.1991991224099974) internal successors, (286681), 130357 states have internal predecessors, (286681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:23,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130358 states to 130358 states and 286681 transitions. [2021-08-21 12:34:23,127 INFO L78 Accepts]: Start accepts. Automaton has 130358 states and 286681 transitions. Word has length 76 [2021-08-21 12:34:23,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:23,127 INFO L470 AbstractCegarLoop]: Abstraction has 130358 states and 286681 transitions. [2021-08-21 12:34:23,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 130358 states and 286681 transitions. [2021-08-21 12:34:23,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:34:23,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:23,235 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:23,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 12:34:23,453 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,SelfDestructingSolverStorable106 [2021-08-21 12:34:23,453 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:23,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:23,453 INFO L82 PathProgramCache]: Analyzing trace with hash -378346330, now seen corresponding path program 95 times [2021-08-21 12:34:23,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:23,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727568383] [2021-08-21 12:34:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:23,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 85 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:23,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:23,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727568383] [2021-08-21 12:34:23,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727568383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:23,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453832626] [2021-08-21 12:34:23,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:34:23,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:23,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:23,916 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) [2021-08-21 12:34:23,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 12:34:25,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:34:25,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:25,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:34:25,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 85 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:26,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453832626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:26,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:26,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:34:26,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051895199] [2021-08-21 12:34:26,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:34:26,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:26,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:34:26,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:34:26,060 INFO L87 Difference]: Start difference. First operand 130358 states and 286681 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:26,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:26,600 INFO L93 Difference]: Finished difference Result 133389 states and 291682 transitions. [2021-08-21 12:34:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:34:26,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:34:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:26,858 INFO L225 Difference]: With dead ends: 133389 [2021-08-21 12:34:26,859 INFO L226 Difference]: Without dead ends: 133389 [2021-08-21 12:34:26,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:34:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133389 states. [2021-08-21 12:34:29,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133389 to 125674. [2021-08-21 12:34:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125674 states, 125673 states have (on average 2.193892085014283) internal successors, (275713), 125673 states have internal predecessors, (275713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125674 states to 125674 states and 275713 transitions. [2021-08-21 12:34:29,620 INFO L78 Accepts]: Start accepts. Automaton has 125674 states and 275713 transitions. Word has length 76 [2021-08-21 12:34:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:29,620 INFO L470 AbstractCegarLoop]: Abstraction has 125674 states and 275713 transitions. [2021-08-21 12:34:29,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 125674 states and 275713 transitions. [2021-08-21 12:34:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:34:29,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:29,724 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:29,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:29,936 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,SelfDestructingSolverStorable107 [2021-08-21 12:34:29,937 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:29,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:29,938 INFO L82 PathProgramCache]: Analyzing trace with hash -653923758, now seen corresponding path program 96 times [2021-08-21 12:34:29,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:29,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693171301] [2021-08-21 12:34:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:29,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:34:30,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:30,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693171301] [2021-08-21 12:34:30,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693171301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:30,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569316730] [2021-08-21 12:34:30,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:34:30,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:30,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:30,003 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) [2021-08-21 12:34:30,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 12:34:32,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:34:32,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:32,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:34:32,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:34:32,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569316730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:32,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:32,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:34:32,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496705510] [2021-08-21 12:34:32,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:34:32,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:32,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:34:32,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:34:32,512 INFO L87 Difference]: Start difference. First operand 125674 states and 275713 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:33,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:33,173 INFO L93 Difference]: Finished difference Result 131872 states and 288047 transitions. [2021-08-21 12:34:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:34:33,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:34:33,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:33,447 INFO L225 Difference]: With dead ends: 131872 [2021-08-21 12:34:33,447 INFO L226 Difference]: Without dead ends: 131866 [2021-08-21 12:34:33,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:34:33,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-08-21 12:34:35,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 128726. [2021-08-21 12:34:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128726 states, 128725 states have (on average 2.197374247426685) internal successors, (282857), 128725 states have internal predecessors, (282857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:36,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128726 states to 128726 states and 282857 transitions. [2021-08-21 12:34:36,171 INFO L78 Accepts]: Start accepts. Automaton has 128726 states and 282857 transitions. Word has length 76 [2021-08-21 12:34:36,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:36,171 INFO L470 AbstractCegarLoop]: Abstraction has 128726 states and 282857 transitions. [2021-08-21 12:34:36,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:36,171 INFO L276 IsEmpty]: Start isEmpty. Operand 128726 states and 282857 transitions. [2021-08-21 12:34:36,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:34:36,278 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:36,278 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:36,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:36,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:36,497 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:36,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:36,497 INFO L82 PathProgramCache]: Analyzing trace with hash 620463782, now seen corresponding path program 97 times [2021-08-21 12:34:36,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:36,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40437327] [2021-08-21 12:34:36,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:36,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 89 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:34:36,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:36,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40437327] [2021-08-21 12:34:36,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40437327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:36,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891815233] [2021-08-21 12:34:36,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:34:36,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:36,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:36,559 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) [2021-08-21 12:34:36,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 12:34:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:38,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:34:38,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 89 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:34:39,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891815233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:39,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:39,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:34:39,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623637147] [2021-08-21 12:34:39,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:34:39,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:34:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:34:39,102 INFO L87 Difference]: Start difference. First operand 128726 states and 282857 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:39,867 INFO L93 Difference]: Finished difference Result 134932 states and 294145 transitions. [2021-08-21 12:34:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:34:39,867 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:34:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:40,132 INFO L225 Difference]: With dead ends: 134932 [2021-08-21 12:34:40,132 INFO L226 Difference]: Without dead ends: 134930 [2021-08-21 12:34:40,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:34:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134930 states. [2021-08-21 12:34:42,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134930 to 128702. [2021-08-21 12:34:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128702 states, 128701 states have (on average 2.1954841065725983) internal successors, (282561), 128701 states have internal predecessors, (282561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128702 states to 128702 states and 282561 transitions. [2021-08-21 12:34:42,774 INFO L78 Accepts]: Start accepts. Automaton has 128702 states and 282561 transitions. Word has length 76 [2021-08-21 12:34:42,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:42,774 INFO L470 AbstractCegarLoop]: Abstraction has 128702 states and 282561 transitions. [2021-08-21 12:34:42,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 128702 states and 282561 transitions. [2021-08-21 12:34:42,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:34:42,873 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:42,873 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:42,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:43,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:43,094 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:43,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:43,094 INFO L82 PathProgramCache]: Analyzing trace with hash 41005788, now seen corresponding path program 98 times [2021-08-21 12:34:43,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:43,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152629311] [2021-08-21 12:34:43,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:43,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:43,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:43,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152629311] [2021-08-21 12:34:43,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152629311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:43,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44789694] [2021-08-21 12:34:43,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:34:43,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:43,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:43,160 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) [2021-08-21 12:34:43,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 12:34:45,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:34:45,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:45,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:34:45,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:34:45,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44789694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:45,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:45,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 12:34:45,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296320227] [2021-08-21 12:34:45,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:34:45,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:45,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:34:45,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:34:45,603 INFO L87 Difference]: Start difference. First operand 128702 states and 282561 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:46,303 INFO L93 Difference]: Finished difference Result 134144 states and 292817 transitions. [2021-08-21 12:34:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:34:46,303 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:34:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:46,560 INFO L225 Difference]: With dead ends: 134144 [2021-08-21 12:34:46,561 INFO L226 Difference]: Without dead ends: 134142 [2021-08-21 12:34:46,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:34:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134142 states. [2021-08-21 12:34:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134142 to 128026. [2021-08-21 12:34:48,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128026 states, 128025 states have (on average 2.1946260495996874) internal successors, (280967), 128025 states have internal predecessors, (280967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:49,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128026 states to 128026 states and 280967 transitions. [2021-08-21 12:34:49,188 INFO L78 Accepts]: Start accepts. Automaton has 128026 states and 280967 transitions. Word has length 76 [2021-08-21 12:34:49,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:49,188 INFO L470 AbstractCegarLoop]: Abstraction has 128026 states and 280967 transitions. [2021-08-21 12:34:49,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 128026 states and 280967 transitions. [2021-08-21 12:34:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:34:49,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:49,335 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:49,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-21 12:34:49,556 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,SelfDestructingSolverStorable110 [2021-08-21 12:34:49,556 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:49,557 INFO L82 PathProgramCache]: Analyzing trace with hash -990810690, now seen corresponding path program 99 times [2021-08-21 12:34:49,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:49,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307872550] [2021-08-21 12:34:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:49,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:34:49,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:49,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307872550] [2021-08-21 12:34:49,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307872550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:49,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790583986] [2021-08-21 12:34:49,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:34:49,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:49,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:49,617 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) [2021-08-21 12:34:49,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 12:34:51,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 12:34:51,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:51,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:34:51,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:34:52,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790583986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:52,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:52,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:34:52,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859811207] [2021-08-21 12:34:52,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:34:52,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:52,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:34:52,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:34:52,075 INFO L87 Difference]: Start difference. First operand 128026 states and 280967 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:34:52,611 INFO L93 Difference]: Finished difference Result 134843 states and 294803 transitions. [2021-08-21 12:34:52,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:34:52,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:34:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:34:53,205 INFO L225 Difference]: With dead ends: 134843 [2021-08-21 12:34:53,205 INFO L226 Difference]: Without dead ends: 134807 [2021-08-21 12:34:53,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:34:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134807 states. [2021-08-21 12:34:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134807 to 131862. [2021-08-21 12:34:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131862 states, 131861 states have (on average 2.1977916138964515) internal successors, (289803), 131861 states have internal predecessors, (289803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131862 states to 131862 states and 289803 transitions. [2021-08-21 12:34:56,385 INFO L78 Accepts]: Start accepts. Automaton has 131862 states and 289803 transitions. Word has length 76 [2021-08-21 12:34:56,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:34:56,386 INFO L470 AbstractCegarLoop]: Abstraction has 131862 states and 289803 transitions. [2021-08-21 12:34:56,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:34:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 131862 states and 289803 transitions. [2021-08-21 12:34:56,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:34:56,570 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:34:56,570 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:34:56,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 12:34:56,784 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,SelfDestructingSolverStorable111 [2021-08-21 12:34:56,785 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:34:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:34:56,785 INFO L82 PathProgramCache]: Analyzing trace with hash 720512850, now seen corresponding path program 100 times [2021-08-21 12:34:56,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:34:56,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403648166] [2021-08-21 12:34:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:34:56,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:34:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:34:56,857 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:34:56,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:34:56,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403648166] [2021-08-21 12:34:56,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403648166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:56,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554076215] [2021-08-21 12:34:56,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:34:56,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:34:56,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:34:56,858 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) [2021-08-21 12:34:56,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 12:34:59,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:34:59,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:34:59,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:34:59,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:34:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:34:59,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554076215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:34:59,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:34:59,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:34:59,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858615694] [2021-08-21 12:34:59,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:34:59,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:34:59,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:34:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:34:59,341 INFO L87 Difference]: Start difference. First operand 131862 states and 289803 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:00,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:00,076 INFO L93 Difference]: Finished difference Result 138462 states and 302796 transitions. [2021-08-21 12:35:00,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:35:00,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:35:00,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:00,356 INFO L225 Difference]: With dead ends: 138462 [2021-08-21 12:35:00,356 INFO L226 Difference]: Without dead ends: 138426 [2021-08-21 12:35:00,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:35:00,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138426 states. [2021-08-21 12:35:02,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138426 to 131338. [2021-08-21 12:35:02,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131338 states, 131337 states have (on average 2.1961747260863276) internal successors, (288439), 131337 states have internal predecessors, (288439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131338 states to 131338 states and 288439 transitions. [2021-08-21 12:35:03,580 INFO L78 Accepts]: Start accepts. Automaton has 131338 states and 288439 transitions. Word has length 76 [2021-08-21 12:35:03,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:03,580 INFO L470 AbstractCegarLoop]: Abstraction has 131338 states and 288439 transitions. [2021-08-21 12:35:03,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:03,580 INFO L276 IsEmpty]: Start isEmpty. Operand 131338 states and 288439 transitions. [2021-08-21 12:35:03,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:35:03,688 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:03,688 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:03,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 12:35:03,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 12:35:03,905 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:03,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:03,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1994900390, now seen corresponding path program 101 times [2021-08-21 12:35:03,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:03,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080596244] [2021-08-21 12:35:03,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:03,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:35:03,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:03,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080596244] [2021-08-21 12:35:03,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080596244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:03,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306148275] [2021-08-21 12:35:03,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:35:03,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:03,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:03,964 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) [2021-08-21 12:35:03,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 12:35:06,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 12:35:06,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:06,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:35:06,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:35:06,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306148275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:06,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:06,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:35:06,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558750397] [2021-08-21 12:35:06,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:35:06,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:06,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:35:06,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:35:06,592 INFO L87 Difference]: Start difference. First operand 131338 states and 288439 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:07,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:07,246 INFO L93 Difference]: Finished difference Result 140394 states and 305750 transitions. [2021-08-21 12:35:07,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:35:07,246 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:35:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:07,519 INFO L225 Difference]: With dead ends: 140394 [2021-08-21 12:35:07,520 INFO L226 Difference]: Without dead ends: 140392 [2021-08-21 12:35:07,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:35:07,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140392 states. [2021-08-21 12:35:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140392 to 131550. [2021-08-21 12:35:09,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131550 states, 131549 states have (on average 2.1950679974762255) internal successors, (288759), 131549 states have internal predecessors, (288759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131550 states to 131550 states and 288759 transitions. [2021-08-21 12:35:10,158 INFO L78 Accepts]: Start accepts. Automaton has 131550 states and 288759 transitions. Word has length 76 [2021-08-21 12:35:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:10,158 INFO L470 AbstractCegarLoop]: Abstraction has 131550 states and 288759 transitions. [2021-08-21 12:35:10,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 131550 states and 288759 transitions. [2021-08-21 12:35:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:35:10,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:10,258 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:10,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 12:35:10,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:10,480 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:10,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:10,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1415442396, now seen corresponding path program 102 times [2021-08-21 12:35:10,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:10,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235317107] [2021-08-21 12:35:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:10,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:35:10,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:10,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235317107] [2021-08-21 12:35:10,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235317107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:10,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789232123] [2021-08-21 12:35:10,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:35:10,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:10,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:10,545 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) [2021-08-21 12:35:10,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 12:35:13,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 12:35:13,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:13,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:35:13,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:35:13,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789232123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:13,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:13,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 12:35:13,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253362603] [2021-08-21 12:35:13,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:35:13,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:13,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:35:13,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:35:13,193 INFO L87 Difference]: Start difference. First operand 131550 states and 288759 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:13,889 INFO L93 Difference]: Finished difference Result 148818 states and 323300 transitions. [2021-08-21 12:35:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:35:13,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:35:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:14,218 INFO L225 Difference]: With dead ends: 148818 [2021-08-21 12:35:14,218 INFO L226 Difference]: Without dead ends: 148800 [2021-08-21 12:35:14,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:35:14,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148800 states. [2021-08-21 12:35:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148800 to 131506. [2021-08-21 12:35:16,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131506 states, 131505 states have (on average 2.19297365119197) internal successors, (288387), 131505 states have internal predecessors, (288387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:16,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131506 states to 131506 states and 288387 transitions. [2021-08-21 12:35:16,932 INFO L78 Accepts]: Start accepts. Automaton has 131506 states and 288387 transitions. Word has length 76 [2021-08-21 12:35:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:16,932 INFO L470 AbstractCegarLoop]: Abstraction has 131506 states and 288387 transitions. [2021-08-21 12:35:16,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:16,932 INFO L276 IsEmpty]: Start isEmpty. Operand 131506 states and 288387 transitions. [2021-08-21 12:35:17,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:35:17,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:17,040 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:17,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 12:35:17,262 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,SelfDestructingSolverStorable114 [2021-08-21 12:35:17,262 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:17,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1426659970, now seen corresponding path program 103 times [2021-08-21 12:35:17,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:17,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057737742] [2021-08-21 12:35:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:17,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:17,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:17,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057737742] [2021-08-21 12:35:17,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057737742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:17,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137704098] [2021-08-21 12:35:17,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:35:17,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:17,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:17,335 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) [2021-08-21 12:35:17,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 12:35:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:19,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:35:19,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:19,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137704098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:19,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:19,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:35:19,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001897344] [2021-08-21 12:35:19,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:35:19,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:19,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:35:19,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:35:19,977 INFO L87 Difference]: Start difference. First operand 131506 states and 288387 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:20,623 INFO L93 Difference]: Finished difference Result 138086 states and 301358 transitions. [2021-08-21 12:35:20,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:35:20,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:35:20,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:20,911 INFO L225 Difference]: With dead ends: 138086 [2021-08-21 12:35:20,911 INFO L226 Difference]: Without dead ends: 138068 [2021-08-21 12:35:20,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:35:21,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138068 states. [2021-08-21 12:35:23,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138068 to 129102. [2021-08-21 12:35:23,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129102 states, 129101 states have (on average 2.1923222902998427) internal successors, (283031), 129101 states have internal predecessors, (283031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129102 states to 129102 states and 283031 transitions. [2021-08-21 12:35:23,462 INFO L78 Accepts]: Start accepts. Automaton has 129102 states and 283031 transitions. Word has length 76 [2021-08-21 12:35:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:23,462 INFO L470 AbstractCegarLoop]: Abstraction has 129102 states and 283031 transitions. [2021-08-21 12:35:23,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:23,462 INFO L276 IsEmpty]: Start isEmpty. Operand 129102 states and 283031 transitions. [2021-08-21 12:35:23,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:35:23,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:23,566 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:23,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-21 12:35:23,786 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,SelfDestructingSolverStorable115 [2021-08-21 12:35:23,786 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:23,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:23,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1566807580, now seen corresponding path program 104 times [2021-08-21 12:35:23,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:23,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307663799] [2021-08-21 12:35:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:23,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:35:23,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:23,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307663799] [2021-08-21 12:35:23,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307663799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:23,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878003743] [2021-08-21 12:35:23,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:35:23,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:23,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:23,847 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) [2021-08-21 12:35:23,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 12:35:26,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:35:26,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:35:26,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:35:26,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878003743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:26,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:26,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:35:26,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145319241] [2021-08-21 12:35:26,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:35:26,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:26,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:35:26,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:35:26,531 INFO L87 Difference]: Start difference. First operand 129102 states and 283031 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:27,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:27,137 INFO L93 Difference]: Finished difference Result 135547 states and 296050 transitions. [2021-08-21 12:35:27,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:35:27,137 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:35:27,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:27,394 INFO L225 Difference]: With dead ends: 135547 [2021-08-21 12:35:27,394 INFO L226 Difference]: Without dead ends: 135511 [2021-08-21 12:35:27,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:35:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135511 states. [2021-08-21 12:35:29,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135511 to 132734. [2021-08-21 12:35:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132734 states, 132733 states have (on average 2.194322436771564) internal successors, (291259), 132733 states have internal predecessors, (291259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132734 states to 132734 states and 291259 transitions. [2021-08-21 12:35:30,049 INFO L78 Accepts]: Start accepts. Automaton has 132734 states and 291259 transitions. Word has length 76 [2021-08-21 12:35:30,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:30,050 INFO L470 AbstractCegarLoop]: Abstraction has 132734 states and 291259 transitions. [2021-08-21 12:35:30,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 132734 states and 291259 transitions. [2021-08-21 12:35:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:35:30,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:30,157 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:30,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 12:35:30,378 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,SelfDestructingSolverStorable116 [2021-08-21 12:35:30,379 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:30,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:30,379 INFO L82 PathProgramCache]: Analyzing trace with hash 577311314, now seen corresponding path program 105 times [2021-08-21 12:35:30,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:30,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013930744] [2021-08-21 12:35:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:30,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:35:30,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:30,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013930744] [2021-08-21 12:35:30,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013930744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:30,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415749687] [2021-08-21 12:35:30,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:35:30,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:30,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:30,885 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) [2021-08-21 12:35:30,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-21 12:35:33,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:35:33,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:33,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:35:33,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:35:33,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415749687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:33,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:33,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:35:33,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401671971] [2021-08-21 12:35:33,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:35:33,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:33,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:35:33,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:35:33,240 INFO L87 Difference]: Start difference. First operand 132734 states and 291259 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:33,789 INFO L93 Difference]: Finished difference Result 139258 states and 304121 transitions. [2021-08-21 12:35:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:35:33,789 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:35:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:34,079 INFO L225 Difference]: With dead ends: 139258 [2021-08-21 12:35:34,080 INFO L226 Difference]: Without dead ends: 139216 [2021-08-21 12:35:34,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:35:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139216 states. [2021-08-21 12:35:36,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139216 to 132450. [2021-08-21 12:35:36,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132450 states, 132449 states have (on average 2.193168691345348) internal successors, (290483), 132449 states have internal predecessors, (290483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132450 states to 132450 states and 290483 transitions. [2021-08-21 12:35:37,236 INFO L78 Accepts]: Start accepts. Automaton has 132450 states and 290483 transitions. Word has length 76 [2021-08-21 12:35:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:37,236 INFO L470 AbstractCegarLoop]: Abstraction has 132450 states and 290483 transitions. [2021-08-21 12:35:37,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 132450 states and 290483 transitions. [2021-08-21 12:35:37,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:35:37,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:37,348 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:37,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-21 12:35:37,570 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,SelfDestructingSolverStorable117 [2021-08-21 12:35:37,570 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:37,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:37,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1851698854, now seen corresponding path program 106 times [2021-08-21 12:35:37,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:37,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423867414] [2021-08-21 12:35:37,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:37,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:35:37,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:37,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423867414] [2021-08-21 12:35:37,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423867414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:37,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526655275] [2021-08-21 12:35:37,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:35:37,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:37,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:37,629 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) [2021-08-21 12:35:37,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-21 12:35:40,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:35:40,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:40,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:35:40,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:35:40,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526655275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:40,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:40,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:35:40,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356250537] [2021-08-21 12:35:40,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:35:40,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:40,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:35:40,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:35:40,333 INFO L87 Difference]: Start difference. First operand 132450 states and 290483 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:40,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:40,971 INFO L93 Difference]: Finished difference Result 142694 states and 310513 transitions. [2021-08-21 12:35:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:35:40,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:35:40,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:41,253 INFO L225 Difference]: With dead ends: 142694 [2021-08-21 12:35:41,253 INFO L226 Difference]: Without dead ends: 142692 [2021-08-21 12:35:41,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:35:41,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142692 states. [2021-08-21 12:35:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142692 to 132698. [2021-08-21 12:35:43,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132698 states, 132697 states have (on average 2.1928076746271583) internal successors, (290979), 132697 states have internal predecessors, (290979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132698 states to 132698 states and 290979 transitions. [2021-08-21 12:35:44,026 INFO L78 Accepts]: Start accepts. Automaton has 132698 states and 290979 transitions. Word has length 76 [2021-08-21 12:35:44,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:44,026 INFO L470 AbstractCegarLoop]: Abstraction has 132698 states and 290979 transitions. [2021-08-21 12:35:44,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:44,027 INFO L276 IsEmpty]: Start isEmpty. Operand 132698 states and 290979 transitions. [2021-08-21 12:35:44,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:35:44,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:44,133 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:44,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-21 12:35:44,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:44,349 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:44,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:44,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1272240860, now seen corresponding path program 107 times [2021-08-21 12:35:44,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:44,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983351754] [2021-08-21 12:35:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:44,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:35:44,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:44,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983351754] [2021-08-21 12:35:44,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983351754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:44,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219433050] [2021-08-21 12:35:44,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:35:44,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:44,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:44,849 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) [2021-08-21 12:35:44,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-21 12:35:47,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 12:35:47,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:47,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:35:47,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:35:47,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219433050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:47,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:47,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 12:35:47,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532384238] [2021-08-21 12:35:47,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:35:47,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:47,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:35:47,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:35:47,484 INFO L87 Difference]: Start difference. First operand 132698 states and 290979 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:48,422 INFO L93 Difference]: Finished difference Result 159426 states and 345883 transitions. [2021-08-21 12:35:48,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:35:48,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:35:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:48,759 INFO L225 Difference]: With dead ends: 159426 [2021-08-21 12:35:48,760 INFO L226 Difference]: Without dead ends: 159408 [2021-08-21 12:35:48,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:35:48,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159408 states. [2021-08-21 12:35:51,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159408 to 133538. [2021-08-21 12:35:51,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133538 states, 133537 states have (on average 2.1909957539857867) internal successors, (292579), 133537 states have internal predecessors, (292579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133538 states to 133538 states and 292579 transitions. [2021-08-21 12:35:51,557 INFO L78 Accepts]: Start accepts. Automaton has 133538 states and 292579 transitions. Word has length 76 [2021-08-21 12:35:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:51,557 INFO L470 AbstractCegarLoop]: Abstraction has 133538 states and 292579 transitions. [2021-08-21 12:35:51,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:51,557 INFO L276 IsEmpty]: Start isEmpty. Operand 133538 states and 292579 transitions. [2021-08-21 12:35:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:35:51,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:51,664 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:51,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-21 12:35:51,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:51,886 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:51,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:51,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1569861506, now seen corresponding path program 108 times [2021-08-21 12:35:51,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:51,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727033872] [2021-08-21 12:35:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:51,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:51,959 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:35:51,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:51,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727033872] [2021-08-21 12:35:51,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727033872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:51,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845416162] [2021-08-21 12:35:51,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:35:51,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:51,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:51,960 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) [2021-08-21 12:35:51,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-21 12:35:54,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 12:35:54,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:35:54,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:35:54,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:35:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:35:54,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845416162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:54,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:35:54,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:35:54,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594767543] [2021-08-21 12:35:54,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:35:54,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:35:54,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:35:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:35:54,888 INFO L87 Difference]: Start difference. First operand 133538 states and 292579 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:35:55,489 INFO L93 Difference]: Finished difference Result 154174 states and 334665 transitions. [2021-08-21 12:35:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:35:55,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:35:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:35:55,782 INFO L225 Difference]: With dead ends: 154174 [2021-08-21 12:35:55,782 INFO L226 Difference]: Without dead ends: 154136 [2021-08-21 12:35:55,783 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:35:56,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154136 states. [2021-08-21 12:35:57,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154136 to 133478. [2021-08-21 12:35:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133478 states, 133477 states have (on average 2.1892535792683385) internal successors, (292215), 133477 states have internal predecessors, (292215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133478 states to 133478 states and 292215 transitions. [2021-08-21 12:35:58,679 INFO L78 Accepts]: Start accepts. Automaton has 133478 states and 292215 transitions. Word has length 76 [2021-08-21 12:35:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:35:58,679 INFO L470 AbstractCegarLoop]: Abstraction has 133478 states and 292215 transitions. [2021-08-21 12:35:58,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:35:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 133478 states and 292215 transitions. [2021-08-21 12:35:58,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:35:58,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:35:58,777 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:35:58,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-21 12:35:58,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:58,993 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:35:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:35:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash 863634524, now seen corresponding path program 109 times [2021-08-21 12:35:58,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:35:58,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615742102] [2021-08-21 12:35:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:35:58,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:35:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:35:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:35:59,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:35:59,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615742102] [2021-08-21 12:35:59,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615742102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:35:59,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934145348] [2021-08-21 12:35:59,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:35:59,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:35:59,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:35:59,129 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) [2021-08-21 12:35:59,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-21 12:36:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:01,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:36:01,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:01,952 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:01,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934145348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:01,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:01,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 12:36:01,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36155477] [2021-08-21 12:36:01,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:36:01,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:36:01,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:36:01,952 INFO L87 Difference]: Start difference. First operand 133478 states and 292215 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:02,630 INFO L93 Difference]: Finished difference Result 139982 states and 305517 transitions. [2021-08-21 12:36:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:36:02,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:36:02,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:02,908 INFO L225 Difference]: With dead ends: 139982 [2021-08-21 12:36:02,908 INFO L226 Difference]: Without dead ends: 139944 [2021-08-21 12:36:02,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:36:03,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139944 states. [2021-08-21 12:36:05,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139944 to 129634. [2021-08-21 12:36:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129634 states, 129633 states have (on average 2.1887250931475783) internal successors, (283731), 129633 states have internal predecessors, (283731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129634 states to 129634 states and 283731 transitions. [2021-08-21 12:36:05,715 INFO L78 Accepts]: Start accepts. Automaton has 129634 states and 283731 transitions. Word has length 76 [2021-08-21 12:36:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:36:05,715 INFO L470 AbstractCegarLoop]: Abstraction has 129634 states and 283731 transitions. [2021-08-21 12:36:05,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 129634 states and 283731 transitions. [2021-08-21 12:36:05,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:36:05,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:36:05,814 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:36:05,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-21 12:36:06,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:06,029 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:36:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:36:06,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1799314242, now seen corresponding path program 110 times [2021-08-21 12:36:06,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:36:06,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633707917] [2021-08-21 12:36:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:36:06,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:36:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:36:06,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:36:06,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633707917] [2021-08-21 12:36:06,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633707917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:06,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306794936] [2021-08-21 12:36:06,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:36:06,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:06,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:36:06,110 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) [2021-08-21 12:36:06,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-21 12:36:08,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:36:08,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:36:08,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:36:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:36:08,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306794936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:08,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:08,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:36:08,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845458784] [2021-08-21 12:36:08,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:36:08,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:08,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:36:08,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:36:08,965 INFO L87 Difference]: Start difference. First operand 129634 states and 283731 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:09,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:09,476 INFO L93 Difference]: Finished difference Result 135321 states and 295193 transitions. [2021-08-21 12:36:09,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 12:36:09,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:36:09,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:09,747 INFO L225 Difference]: With dead ends: 135321 [2021-08-21 12:36:09,748 INFO L226 Difference]: Without dead ends: 135249 [2021-08-21 12:36:09,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:36:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135249 states. [2021-08-21 12:36:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135249 to 123270. [2021-08-21 12:36:12,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123270 states, 123269 states have (on average 2.185910488443972) internal successors, (269455), 123269 states have internal predecessors, (269455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123270 states to 123270 states and 269455 transitions. [2021-08-21 12:36:12,576 INFO L78 Accepts]: Start accepts. Automaton has 123270 states and 269455 transitions. Word has length 76 [2021-08-21 12:36:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:36:12,577 INFO L470 AbstractCegarLoop]: Abstraction has 123270 states and 269455 transitions. [2021-08-21 12:36:12,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 123270 states and 269455 transitions. [2021-08-21 12:36:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:36:12,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:36:12,685 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:36:12,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-21 12:36:12,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:12,901 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:36:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:36:12,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2079133522, now seen corresponding path program 111 times [2021-08-21 12:36:12,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:36:12,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892868008] [2021-08-21 12:36:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:36:12,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:36:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:36:12,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:36:12,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892868008] [2021-08-21 12:36:12,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892868008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:12,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893751347] [2021-08-21 12:36:12,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:36:12,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:12,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:36:12,988 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) [2021-08-21 12:36:12,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-21 12:36:15,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 12:36:15,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:36:15,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:36:15,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:36:15,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893751347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:15,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:15,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:36:15,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192052493] [2021-08-21 12:36:15,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:36:15,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:15,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:36:15,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:36:15,895 INFO L87 Difference]: Start difference. First operand 123270 states and 269455 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:16,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:16,516 INFO L93 Difference]: Finished difference Result 128955 states and 280766 transitions. [2021-08-21 12:36:16,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:36:16,517 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:36:16,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:16,774 INFO L225 Difference]: With dead ends: 128955 [2021-08-21 12:36:16,774 INFO L226 Difference]: Without dead ends: 128913 [2021-08-21 12:36:16,774 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:36:16,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128913 states. [2021-08-21 12:36:18,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128913 to 122990. [2021-08-21 12:36:18,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122990 states, 122989 states have (on average 2.185553179552643) internal successors, (268799), 122989 states have internal predecessors, (268799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122990 states to 122990 states and 268799 transitions. [2021-08-21 12:36:19,438 INFO L78 Accepts]: Start accepts. Automaton has 122990 states and 268799 transitions. Word has length 76 [2021-08-21 12:36:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:36:19,438 INFO L470 AbstractCegarLoop]: Abstraction has 122990 states and 268799 transitions. [2021-08-21 12:36:19,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 122990 states and 268799 transitions. [2021-08-21 12:36:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:36:19,532 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:36:19,532 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:36:19,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-21 12:36:19,755 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,SelfDestructingSolverStorable123 [2021-08-21 12:36:19,755 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:36:19,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:36:19,755 INFO L82 PathProgramCache]: Analyzing trace with hash -941446234, now seen corresponding path program 112 times [2021-08-21 12:36:19,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:36:19,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082219549] [2021-08-21 12:36:19,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:36:19,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:36:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 120 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:36:19,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:36:19,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082219549] [2021-08-21 12:36:19,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082219549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:19,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037191833] [2021-08-21 12:36:19,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:36:19,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:19,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:36:19,814 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) [2021-08-21 12:36:19,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-21 12:36:22,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:36:22,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:36:22,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:36:22,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 120 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:36:22,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037191833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:22,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:22,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-21 12:36:22,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344892994] [2021-08-21 12:36:22,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:36:22,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:22,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:36:22,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:36:22,675 INFO L87 Difference]: Start difference. First operand 122990 states and 268799 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:23,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:23,251 INFO L93 Difference]: Finished difference Result 130997 states and 284211 transitions. [2021-08-21 12:36:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:36:23,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:36:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:23,512 INFO L225 Difference]: With dead ends: 130997 [2021-08-21 12:36:23,513 INFO L226 Difference]: Without dead ends: 130997 [2021-08-21 12:36:23,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:36:23,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130997 states. [2021-08-21 12:36:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130997 to 123134. [2021-08-21 12:36:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123134 states, 123133 states have (on average 2.1853036960035084) internal successors, (269083), 123133 states have internal predecessors, (269083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123134 states to 123134 states and 269083 transitions. [2021-08-21 12:36:26,147 INFO L78 Accepts]: Start accepts. Automaton has 123134 states and 269083 transitions. Word has length 76 [2021-08-21 12:36:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:36:26,147 INFO L470 AbstractCegarLoop]: Abstraction has 123134 states and 269083 transitions. [2021-08-21 12:36:26,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 123134 states and 269083 transitions. [2021-08-21 12:36:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:36:26,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:36:26,239 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:36:26,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-21 12:36:26,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-21 12:36:26,461 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:36:26,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:36:26,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1520904228, now seen corresponding path program 113 times [2021-08-21 12:36:26,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:36:26,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174664759] [2021-08-21 12:36:26,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:36:26,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:36:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:36:26,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:36:26,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174664759] [2021-08-21 12:36:26,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174664759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:26,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316337276] [2021-08-21 12:36:26,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:36:26,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:26,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:36:26,529 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) [2021-08-21 12:36:26,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-21 12:36:29,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 12:36:29,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:36:29,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:36:29,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:36:29,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316337276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:29,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:29,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 12:36:29,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519094528] [2021-08-21 12:36:29,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:36:29,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:29,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:36:29,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:36:29,385 INFO L87 Difference]: Start difference. First operand 123134 states and 269083 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:29,963 INFO L93 Difference]: Finished difference Result 145897 states and 315475 transitions. [2021-08-21 12:36:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:36:29,963 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:36:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:30,248 INFO L225 Difference]: With dead ends: 145897 [2021-08-21 12:36:30,248 INFO L226 Difference]: Without dead ends: 145897 [2021-08-21 12:36:30,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:36:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145897 states. [2021-08-21 12:36:32,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145897 to 123934. [2021-08-21 12:36:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123934 states, 123933 states have (on average 2.184720776548619) internal successors, (270759), 123933 states have internal predecessors, (270759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123934 states to 123934 states and 270759 transitions. [2021-08-21 12:36:32,998 INFO L78 Accepts]: Start accepts. Automaton has 123934 states and 270759 transitions. Word has length 76 [2021-08-21 12:36:32,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:36:32,998 INFO L470 AbstractCegarLoop]: Abstraction has 123934 states and 270759 transitions. [2021-08-21 12:36:32,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 123934 states and 270759 transitions. [2021-08-21 12:36:33,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:36:33,093 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:36:33,093 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:36:33,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-21 12:36:33,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-21 12:36:33,315 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:36:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:36:33,316 INFO L82 PathProgramCache]: Analyzing trace with hash -68039298, now seen corresponding path program 114 times [2021-08-21 12:36:33,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:36:33,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719742731] [2021-08-21 12:36:33,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:36:33,316 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:36:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:36:33,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:36:33,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719742731] [2021-08-21 12:36:33,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719742731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:33,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384194595] [2021-08-21 12:36:33,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:36:33,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:33,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:36:33,387 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) [2021-08-21 12:36:33,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-21 12:36:36,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 12:36:36,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:36:36,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:36:36,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:36:36,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384194595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:36,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:36,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:36:36,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12622449] [2021-08-21 12:36:36,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:36:36,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:36,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:36:36,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:36:36,355 INFO L87 Difference]: Start difference. First operand 123934 states and 270759 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:36,967 INFO L93 Difference]: Finished difference Result 146309 states and 316555 transitions. [2021-08-21 12:36:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:36:36,968 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:36:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:37,255 INFO L225 Difference]: With dead ends: 146309 [2021-08-21 12:36:37,255 INFO L226 Difference]: Without dead ends: 146309 [2021-08-21 12:36:37,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:36:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146309 states. [2021-08-21 12:36:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146309 to 124414. [2021-08-21 12:36:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124414 states, 124413 states have (on average 2.1839438000852) internal successors, (271711), 124413 states have internal predecessors, (271711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124414 states to 124414 states and 271711 transitions. [2021-08-21 12:36:40,057 INFO L78 Accepts]: Start accepts. Automaton has 124414 states and 271711 transitions. Word has length 76 [2021-08-21 12:36:40,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:36:40,057 INFO L470 AbstractCegarLoop]: Abstraction has 124414 states and 271711 transitions. [2021-08-21 12:36:40,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:40,057 INFO L276 IsEmpty]: Start isEmpty. Operand 124414 states and 271711 transitions. [2021-08-21 12:36:40,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:36:40,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:36:40,157 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:36:40,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-21 12:36:40,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:40,380 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:36:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:36:40,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1929510564, now seen corresponding path program 115 times [2021-08-21 12:36:40,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:36:40,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956879237] [2021-08-21 12:36:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:36:40,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:36:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:36:40,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:36:40,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956879237] [2021-08-21 12:36:40,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956879237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:40,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630129343] [2021-08-21 12:36:40,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:36:40,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:40,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:36:40,846 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) [2021-08-21 12:36:40,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-21 12:36:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:43,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:36:43,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:36:43,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630129343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:43,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:43,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 12:36:43,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127263352] [2021-08-21 12:36:43,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:36:43,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:43,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:36:43,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:36:43,580 INFO L87 Difference]: Start difference. First operand 124414 states and 271711 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:44,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:44,164 INFO L93 Difference]: Finished difference Result 138029 states and 299093 transitions. [2021-08-21 12:36:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:36:44,165 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:36:44,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:44,577 INFO L225 Difference]: With dead ends: 138029 [2021-08-21 12:36:44,577 INFO L226 Difference]: Without dead ends: 138029 [2021-08-21 12:36:44,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-08-21 12:36:44,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138029 states. [2021-08-21 12:36:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138029 to 123854. [2021-08-21 12:36:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123854 states, 123853 states have (on average 2.1827085335034275) internal successors, (270335), 123853 states have internal predecessors, (270335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:47,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123854 states to 123854 states and 270335 transitions. [2021-08-21 12:36:47,106 INFO L78 Accepts]: Start accepts. Automaton has 123854 states and 270335 transitions. Word has length 76 [2021-08-21 12:36:47,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:36:47,106 INFO L470 AbstractCegarLoop]: Abstraction has 123854 states and 270335 transitions. [2021-08-21 12:36:47,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand 123854 states and 270335 transitions. [2021-08-21 12:36:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:36:47,216 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:36:47,216 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:36:47,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-21 12:36:47,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:47,429 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:36:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:36:47,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1654532994, now seen corresponding path program 116 times [2021-08-21 12:36:47,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:36:47,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710746433] [2021-08-21 12:36:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:36:47,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:36:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:48,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:36:48,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710746433] [2021-08-21 12:36:48,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710746433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:48,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892143070] [2021-08-21 12:36:48,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:36:48,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:48,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:36:48,209 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) [2021-08-21 12:36:48,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-21 12:36:50,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:36:50,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:36:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:36:50,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:36:50,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892143070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:50,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:50,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-21 12:36:50,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167690374] [2021-08-21 12:36:50,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 12:36:50,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:50,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 12:36:50,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-21 12:36:50,967 INFO L87 Difference]: Start difference. First operand 123854 states and 270335 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:51,676 INFO L93 Difference]: Finished difference Result 128519 states and 279224 transitions. [2021-08-21 12:36:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:36:51,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:36:51,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:51,951 INFO L225 Difference]: With dead ends: 128519 [2021-08-21 12:36:51,951 INFO L226 Difference]: Without dead ends: 128519 [2021-08-21 12:36:51,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:36:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128519 states. [2021-08-21 12:36:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128519 to 117206. [2021-08-21 12:36:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117206 states, 117205 states have (on average 2.179659570837422) internal successors, (255467), 117205 states have internal predecessors, (255467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117206 states to 117206 states and 255467 transitions. [2021-08-21 12:36:54,347 INFO L78 Accepts]: Start accepts. Automaton has 117206 states and 255467 transitions. Word has length 76 [2021-08-21 12:36:54,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:36:54,347 INFO L470 AbstractCegarLoop]: Abstraction has 117206 states and 255467 transitions. [2021-08-21 12:36:54,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 117206 states and 255467 transitions. [2021-08-21 12:36:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:36:54,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:36:54,457 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:36:54,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-21 12:36:54,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:54,659 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:36:54,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:36:54,660 INFO L82 PathProgramCache]: Analyzing trace with hash 234104530, now seen corresponding path program 117 times [2021-08-21 12:36:54,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:36:54,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398420255] [2021-08-21 12:36:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:36:54,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:36:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:36:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:36:55,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:36:55,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398420255] [2021-08-21 12:36:55,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398420255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:55,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376773766] [2021-08-21 12:36:55,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:36:55,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:36:55,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:36:55,113 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) [2021-08-21 12:36:55,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-21 12:36:57,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 12:36:57,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:36:57,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:36:57,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:36:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:36:57,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376773766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:36:57,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:36:57,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-21 12:36:57,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345874296] [2021-08-21 12:36:57,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:36:57,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:36:57,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:36:57,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:36:57,820 INFO L87 Difference]: Start difference. First operand 117206 states and 255467 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:36:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:36:58,360 INFO L93 Difference]: Finished difference Result 128191 states and 279004 transitions. [2021-08-21 12:36:58,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 12:36:58,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:36:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:36:58,958 INFO L225 Difference]: With dead ends: 128191 [2021-08-21 12:36:58,959 INFO L226 Difference]: Without dead ends: 128065 [2021-08-21 12:36:58,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:36:59,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128065 states. [2021-08-21 12:37:00,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128065 to 122126. [2021-08-21 12:37:00,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.1861780962128967) internal successors, (266987), 122125 states have internal predecessors, (266987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266987 transitions. [2021-08-21 12:37:01,251 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266987 transitions. Word has length 76 [2021-08-21 12:37:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:01,251 INFO L470 AbstractCegarLoop]: Abstraction has 122126 states and 266987 transitions. [2021-08-21 12:37:01,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:01,251 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266987 transitions. [2021-08-21 12:37:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:37:01,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:01,362 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:01,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-21 12:37:01,569 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,SelfDestructingSolverStorable129 [2021-08-21 12:37:01,570 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:01,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:01,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2106771108, now seen corresponding path program 118 times [2021-08-21 12:37:01,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:01,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340872774] [2021-08-21 12:37:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:01,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 12:37:02,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:02,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340872774] [2021-08-21 12:37:02,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340872774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:02,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161380280] [2021-08-21 12:37:02,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:37:02,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:02,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:02,085 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) [2021-08-21 12:37:02,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-21 12:37:04,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:37:04,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:04,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:37:04,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-21 12:37:04,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161380280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:04,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:04,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-21 12:37:04,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014387981] [2021-08-21 12:37:04,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 12:37:04,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:04,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 12:37:04,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-21 12:37:04,861 INFO L87 Difference]: Start difference. First operand 122126 states and 266987 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:05,361 INFO L93 Difference]: Finished difference Result 124343 states and 270490 transitions. [2021-08-21 12:37:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:37:05,361 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:37:05,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:05,881 INFO L225 Difference]: With dead ends: 124343 [2021-08-21 12:37:05,881 INFO L226 Difference]: Without dead ends: 124247 [2021-08-21 12:37:05,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:37:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124247 states. [2021-08-21 12:37:07,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124247 to 122126. [2021-08-21 12:37:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185523029682702) internal successors, (266907), 122125 states have internal predecessors, (266907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266907 transitions. [2021-08-21 12:37:08,156 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266907 transitions. Word has length 76 [2021-08-21 12:37:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:08,156 INFO L470 AbstractCegarLoop]: Abstraction has 122126 states and 266907 transitions. [2021-08-21 12:37:08,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266907 transitions. [2021-08-21 12:37:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:37:08,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:08,251 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:08,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-21 12:37:08,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:08,474 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:08,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1062233966, now seen corresponding path program 119 times [2021-08-21 12:37:08,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:08,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674361568] [2021-08-21 12:37:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:08,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:37:08,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:08,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674361568] [2021-08-21 12:37:08,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674361568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:08,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719403116] [2021-08-21 12:37:08,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:37:08,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:08,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:08,911 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) [2021-08-21 12:37:08,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-21 12:37:11,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 12:37:11,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:11,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 12:37:11,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-21 12:37:11,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719403116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:11,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:11,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-21 12:37:11,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337149499] [2021-08-21 12:37:11,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:37:11,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:11,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:37:11,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:37:11,800 INFO L87 Difference]: Start difference. First operand 122126 states and 266907 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:12,516 INFO L93 Difference]: Finished difference Result 123893 states and 269670 transitions. [2021-08-21 12:37:12,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:37:12,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:37:12,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:12,767 INFO L225 Difference]: With dead ends: 123893 [2021-08-21 12:37:12,767 INFO L226 Difference]: Without dead ends: 123827 [2021-08-21 12:37:12,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 81.8ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:12,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123827 states. [2021-08-21 12:37:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123827 to 122126. [2021-08-21 12:37:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185195496417605) internal successors, (266867), 122125 states have internal predecessors, (266867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266867 transitions. [2021-08-21 12:37:14,904 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266867 transitions. Word has length 76 [2021-08-21 12:37:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:14,904 INFO L470 AbstractCegarLoop]: Abstraction has 122126 states and 266867 transitions. [2021-08-21 12:37:14,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266867 transitions. [2021-08-21 12:37:14,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:37:15,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:15,000 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:15,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-21 12:37:15,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:15,213 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:15,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:15,213 INFO L82 PathProgramCache]: Analyzing trace with hash 781873052, now seen corresponding path program 120 times [2021-08-21 12:37:15,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:15,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093578387] [2021-08-21 12:37:15,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:15,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 12:37:15,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:15,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093578387] [2021-08-21 12:37:15,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093578387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:15,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067600142] [2021-08-21 12:37:15,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:37:15,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:15,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:15,702 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) [2021-08-21 12:37:15,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-21 12:37:18,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 12:37:18,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:18,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 12:37:18,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-08-21 12:37:18,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067600142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:18,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:18,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-08-21 12:37:18,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866859643] [2021-08-21 12:37:18,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:37:18,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:18,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:37:18,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:37:18,687 INFO L87 Difference]: Start difference. First operand 122126 states and 266867 transitions. Second operand has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:20,362 INFO L93 Difference]: Finished difference Result 203383 states and 440408 transitions. [2021-08-21 12:37:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-21 12:37:20,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:37:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:21,237 INFO L225 Difference]: With dead ends: 203383 [2021-08-21 12:37:21,238 INFO L226 Difference]: Without dead ends: 203092 [2021-08-21 12:37:21,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 1119.0ms TimeCoverageRelationStatistics Valid=782, Invalid=6190, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 12:37:21,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203092 states. [2021-08-21 12:37:24,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203092 to 153026. [2021-08-21 12:37:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153026 states, 153025 states have (on average 2.1853487992158143) internal successors, (334413), 153025 states have internal predecessors, (334413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153026 states to 153026 states and 334413 transitions. [2021-08-21 12:37:25,287 INFO L78 Accepts]: Start accepts. Automaton has 153026 states and 334413 transitions. Word has length 76 [2021-08-21 12:37:25,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:25,287 INFO L470 AbstractCegarLoop]: Abstraction has 153026 states and 334413 transitions. [2021-08-21 12:37:25,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 153026 states and 334413 transitions. [2021-08-21 12:37:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 12:37:25,393 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:25,393 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:25,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2021-08-21 12:37:25,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:25,613 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:25,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:25,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1916744963, now seen corresponding path program 121 times [2021-08-21 12:37:25,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:25,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831784604] [2021-08-21 12:37:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:25,613 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 144 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:25,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:25,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831784604] [2021-08-21 12:37:25,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831784604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:25,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111960191] [2021-08-21 12:37:25,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:37:25,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:25,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:25,735 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) [2021-08-21 12:37:25,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-21 12:37:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:28,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 12:37:28,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 114 proven. 41 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-08-21 12:37:28,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111960191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:28,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:28,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 15 [2021-08-21 12:37:28,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969922809] [2021-08-21 12:37:28,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:37:28,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:28,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:37:28,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:37:28,674 INFO L87 Difference]: Start difference. First operand 153026 states and 334413 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:29,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:29,312 INFO L93 Difference]: Finished difference Result 163078 states and 354025 transitions. [2021-08-21 12:37:29,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:37:29,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 12:37:29,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:29,635 INFO L225 Difference]: With dead ends: 163078 [2021-08-21 12:37:29,635 INFO L226 Difference]: Without dead ends: 162830 [2021-08-21 12:37:29,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:37:30,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162830 states. [2021-08-21 12:37:31,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162830 to 153130. [2021-08-21 12:37:32,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153130 states, 153129 states have (on average 2.1844392636273993) internal successors, (334501), 153129 states have internal predecessors, (334501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:32,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153130 states to 153130 states and 334501 transitions. [2021-08-21 12:37:32,796 INFO L78 Accepts]: Start accepts. Automaton has 153130 states and 334501 transitions. Word has length 76 [2021-08-21 12:37:32,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:37:32,796 INFO L470 AbstractCegarLoop]: Abstraction has 153130 states and 334501 transitions. [2021-08-21 12:37:32,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:32,797 INFO L276 IsEmpty]: Start isEmpty. Operand 153130 states and 334501 transitions. [2021-08-21 12:37:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-21 12:37:32,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:37:32,967 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:37:32,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-21 12:37:33,189 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,SelfDestructingSolverStorable133 [2021-08-21 12:37:33,189 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 12:37:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:37:33,190 INFO L82 PathProgramCache]: Analyzing trace with hash -381769923, now seen corresponding path program 122 times [2021-08-21 12:37:33,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:37:33,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902963795] [2021-08-21 12:37:33,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:37:33,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:37:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:37:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:33,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:37:33,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902963795] [2021-08-21 12:37:33,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902963795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:33,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41025090] [2021-08-21 12:37:33,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:37:33,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:37:33,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:37:33,753 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) [2021-08-21 12:37:33,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-21 12:37:36,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:37:36,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:37:36,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 12:37:36,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:37:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:37:36,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41025090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:37:36,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:37:36,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-08-21 12:37:36,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272284649] [2021-08-21 12:37:36,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 12:37:36,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:37:36,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 12:37:36,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:37:36,579 INFO L87 Difference]: Start difference. First operand 153130 states and 334501 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:37:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:37:37,500 INFO L93 Difference]: Finished difference Result 169486 states and 368744 transitions. [2021-08-21 12:37:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:37:37,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-21 12:37:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:37:37,849 INFO L225 Difference]: With dead ends: 169486 [2021-08-21 12:37:37,849 INFO L226 Difference]: Without dead ends: 169486 [2021-08-21 12:37:37,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 611.3ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:37:38,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169486 states.