/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 19:29:33,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 19:29:33,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 19:29:33,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 19:29:33,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 19:29:33,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 19:29:33,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 19:29:33,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 19:29:33,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 19:29:33,557 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 19:29:33,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 19:29:33,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 19:29:33,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 19:29:33,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 19:29:33,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 19:29:33,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 19:29:33,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 19:29:33,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 19:29:33,559 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 19:29:33,559 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 19:29:33,559 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 19:29:33,559 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 19:29:33,559 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 19:29:33,559 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 19:29:33,559 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 19:29:33,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 19:29:33,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:29:33,560 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 19:29:33,560 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 19:29:33,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 19:29:33,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 19:29:33,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 19:29:33,560 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 19:29:33,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 19:29:33,560 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 19:29:33,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 19:29:33,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 19:29:33,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 19:29:33,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 19:29:33,818 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 19:29:33,818 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 19:29:33,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2021-08-06 19:29:33,819 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2021-08-06 19:29:33,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 19:29:33,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 19:29:33,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 19:29:33,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 19:29:33,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 19:29:33,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:29:33" (1/1) ... [2021-08-06 19:29:33,864 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:29:33" (1/1) ... [2021-08-06 19:29:33,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 19:29:33,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 19:29:33,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 19:29:33,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 19:29:33,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:29:33" (1/1) ... [2021-08-06 19:29:33,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:29:33" (1/1) ... [2021-08-06 19:29:33,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:29:33" (1/1) ... [2021-08-06 19:29:33,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:29:33" (1/1) ... [2021-08-06 19:29:33,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:29:33" (1/1) ... [2021-08-06 19:29:33,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:29:33" (1/1) ... [2021-08-06 19:29:33,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:29:33" (1/1) ... [2021-08-06 19:29:33,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 19:29:33,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 19:29:33,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 19:29:33,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 19:29:33,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:29:33" (1/1) ... [2021-08-06 19:29:33,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 19:29:33,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:33,909 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 19:29:33,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 19:29:33,944 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 19:29:33,944 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 19:29:33,944 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 19:29:33,944 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 19:29:33,944 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 19:29:33,944 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 19:29:33,944 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 19:29:33,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 19:29:33,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 19:29:33,945 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 19:29:33,945 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 19:29:33,945 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 19:29:33,945 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 19:29:34,072 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 19:29:34,072 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 19:29:34,074 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:29:34 BoogieIcfgContainer [2021-08-06 19:29:34,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 19:29:34,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 19:29:34,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 19:29:34,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 19:29:34,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 07:29:33" (1/2) ... [2021-08-06 19:29:34,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d004674 and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 07:29:34, skipping insertion in model container [2021-08-06 19:29:34,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 07:29:34" (2/2) ... [2021-08-06 19:29:34,078 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2021-08-06 19:29:34,081 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 19:29:34,081 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 19:29:34,082 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 19:29:34,082 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 19:29:34,107 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 19:29:34,134 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 19:29:34,138 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 19:29:34,138 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 19:29:34,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 76 states have (on average 1.7763157894736843) internal successors, (135), 108 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:34,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-06 19:29:34,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:34,225 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:34,225 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:34,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1182867846, now seen corresponding path program 1 times [2021-08-06 19:29:34,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:34,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838742121] [2021-08-06 19:29:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:34,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:34,407 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 80.6 percent of original size [2021-08-06 19:29:34,430 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 80.6 percent of original size [2021-08-06 19:29:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:34,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:34,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838742121] [2021-08-06 19:29:34,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838742121] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:29:34,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:29:34,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-06 19:29:34,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818080696] [2021-08-06 19:29:34,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 19:29:34,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:34,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 19:29:34,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:29:34,475 INFO L87 Difference]: Start difference. First operand has 109 states, 76 states have (on average 1.7763157894736843) internal successors, (135), 108 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:34,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:34,507 INFO L93 Difference]: Finished difference Result 214 states and 266 transitions. [2021-08-06 19:29:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 19:29:34,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-06 19:29:34,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:34,517 INFO L225 Difference]: With dead ends: 214 [2021-08-06 19:29:34,517 INFO L226 Difference]: Without dead ends: 61 [2021-08-06 19:29:34,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 19:29:34,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-06 19:29:34,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-08-06 19:29:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 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) [2021-08-06 19:29:34,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 71 transitions. [2021-08-06 19:29:34,550 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 71 transitions. Word has length 15 [2021-08-06 19:29:34,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:34,551 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 71 transitions. [2021-08-06 19:29:34,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:34,551 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 71 transitions. [2021-08-06 19:29:34,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:29:34,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:34,553 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:34,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 19:29:34,553 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:34,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:34,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1202296936, now seen corresponding path program 1 times [2021-08-06 19:29:34,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:34,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48414504] [2021-08-06 19:29:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:34,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:34,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:34,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48414504] [2021-08-06 19:29:34,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48414504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:34,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440408279] [2021-08-06 19:29:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:34,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:34,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:34,632 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:34,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 19:29:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:34,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:29:34,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:34,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440408279] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:34,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:34,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-08-06 19:29:34,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236883755] [2021-08-06 19:29:34,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:29:34,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:34,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:29:34,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:29:34,874 INFO L87 Difference]: Start difference. First operand 42 states and 71 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:34,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:34,956 INFO L93 Difference]: Finished difference Result 93 states and 153 transitions. [2021-08-06 19:29:34,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:29:34,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:29:34,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:34,960 INFO L225 Difference]: With dead ends: 93 [2021-08-06 19:29:34,960 INFO L226 Difference]: Without dead ends: 93 [2021-08-06 19:29:34,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:29:34,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-06 19:29:34,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 54. [2021-08-06 19:29:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 53 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 104 transitions. [2021-08-06 19:29:34,975 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 104 transitions. Word has length 17 [2021-08-06 19:29:34,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:34,975 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 104 transitions. [2021-08-06 19:29:34,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:34,976 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 104 transitions. [2021-08-06 19:29:34,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:29:34,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:34,977 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:34,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:35,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:35,193 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:35,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:35,195 INFO L82 PathProgramCache]: Analyzing trace with hash 103176168, now seen corresponding path program 1 times [2021-08-06 19:29:35,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:35,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172943655] [2021-08-06 19:29:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:35,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:35,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:35,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172943655] [2021-08-06 19:29:35,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172943655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:35,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89022484] [2021-08-06 19:29:35,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:35,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:35,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:35,261 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:35,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 19:29:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:35,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 19:29:35,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:35,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89022484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:35,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:35,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-08-06 19:29:35,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546029472] [2021-08-06 19:29:35,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 19:29:35,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:35,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 19:29:35,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:29:35,499 INFO L87 Difference]: Start difference. First operand 54 states and 104 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:35,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:35,592 INFO L93 Difference]: Finished difference Result 93 states and 164 transitions. [2021-08-06 19:29:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:29:35,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:29:35,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:35,593 INFO L225 Difference]: With dead ends: 93 [2021-08-06 19:29:35,593 INFO L226 Difference]: Without dead ends: 93 [2021-08-06 19:29:35,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:29:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-06 19:29:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 45. [2021-08-06 19:29:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 77 transitions. [2021-08-06 19:29:35,596 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 77 transitions. Word has length 17 [2021-08-06 19:29:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:35,596 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 77 transitions. [2021-08-06 19:29:35,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 77 transitions. [2021-08-06 19:29:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:29:35,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:35,597 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:35,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:35,810 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,SelfDestructingSolverStorable2 [2021-08-06 19:29:35,811 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:35,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:35,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1729584356, now seen corresponding path program 1 times [2021-08-06 19:29:35,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:35,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715575853] [2021-08-06 19:29:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:35,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:35,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:35,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715575853] [2021-08-06 19:29:35,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715575853] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:29:35,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:29:35,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:29:35,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666690469] [2021-08-06 19:29:35,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:29:35,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:35,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:29:35,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:29:35,870 INFO L87 Difference]: Start difference. First operand 45 states and 77 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:35,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:35,938 INFO L93 Difference]: Finished difference Result 102 states and 169 transitions. [2021-08-06 19:29:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:29:35,941 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:29:35,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:35,942 INFO L225 Difference]: With dead ends: 102 [2021-08-06 19:29:35,942 INFO L226 Difference]: Without dead ends: 102 [2021-08-06 19:29:35,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:29:35,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-06 19:29:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 54. [2021-08-06 19:29:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.849056603773585) internal successors, (98), 53 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 98 transitions. [2021-08-06 19:29:35,951 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 98 transitions. Word has length 17 [2021-08-06 19:29:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:35,951 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 98 transitions. [2021-08-06 19:29:35,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 98 transitions. [2021-08-06 19:29:35,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:29:35,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:35,955 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:35,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 19:29:35,955 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:35,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:35,956 INFO L82 PathProgramCache]: Analyzing trace with hash -992998172, now seen corresponding path program 2 times [2021-08-06 19:29:35,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:35,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359375605] [2021-08-06 19:29:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:35,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:36,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:36,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359375605] [2021-08-06 19:29:36,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359375605] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:29:36,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:29:36,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 19:29:36,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094484403] [2021-08-06 19:29:36,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 19:29:36,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:36,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 19:29:36,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 19:29:36,009 INFO L87 Difference]: Start difference. First operand 54 states and 98 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:36,058 INFO L93 Difference]: Finished difference Result 75 states and 129 transitions. [2021-08-06 19:29:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:29:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:29:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:36,059 INFO L225 Difference]: With dead ends: 75 [2021-08-06 19:29:36,059 INFO L226 Difference]: Without dead ends: 73 [2021-08-06 19:29:36,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 19:29:36,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-06 19:29:36,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 56. [2021-08-06 19:29:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:36,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 103 transitions. [2021-08-06 19:29:36,061 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 103 transitions. Word has length 17 [2021-08-06 19:29:36,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:36,061 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 103 transitions. [2021-08-06 19:29:36,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:36,061 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 103 transitions. [2021-08-06 19:29:36,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 19:29:36,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:36,062 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:36,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 19:29:36,062 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:36,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:36,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1810474212, now seen corresponding path program 3 times [2021-08-06 19:29:36,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:36,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75745823] [2021-08-06 19:29:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:36,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:36,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:36,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:36,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75745823] [2021-08-06 19:29:36,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75745823] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 19:29:36,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 19:29:36,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 19:29:36,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676479053] [2021-08-06 19:29:36,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 19:29:36,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:36,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 19:29:36,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 19:29:36,106 INFO L87 Difference]: Start difference. First operand 56 states and 103 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:36,164 INFO L93 Difference]: Finished difference Result 77 states and 134 transitions. [2021-08-06 19:29:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:29:36,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 19:29:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:36,165 INFO L225 Difference]: With dead ends: 77 [2021-08-06 19:29:36,165 INFO L226 Difference]: Without dead ends: 77 [2021-08-06 19:29:36,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:29:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-06 19:29:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 56. [2021-08-06 19:29:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 55 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 103 transitions. [2021-08-06 19:29:36,173 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 103 transitions. Word has length 17 [2021-08-06 19:29:36,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:36,173 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 103 transitions. [2021-08-06 19:29:36,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 103 transitions. [2021-08-06 19:29:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:29:36,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:36,175 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:36,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 19:29:36,175 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:36,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:36,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1073896634, now seen corresponding path program 1 times [2021-08-06 19:29:36,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:36,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650293552] [2021-08-06 19:29:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:36,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:36,243 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 19:29:36,245 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 19:29:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:36,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:36,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650293552] [2021-08-06 19:29:36,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650293552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:36,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201934587] [2021-08-06 19:29:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:36,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:36,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:36,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:36,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 19:29:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:36,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:29:36,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:36,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201934587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:36,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:36,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-06 19:29:36,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582618848] [2021-08-06 19:29:36,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:29:36,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:36,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:29:36,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:29:36,589 INFO L87 Difference]: Start difference. First operand 56 states and 103 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:36,624 INFO L93 Difference]: Finished difference Result 190 states and 321 transitions. [2021-08-06 19:29:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 19:29:36,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:29:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:36,625 INFO L225 Difference]: With dead ends: 190 [2021-08-06 19:29:36,625 INFO L226 Difference]: Without dead ends: 180 [2021-08-06 19:29:36,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:29:36,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-08-06 19:29:36,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2021-08-06 19:29:36,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 103 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 203 transitions. [2021-08-06 19:29:36,629 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 203 transitions. Word has length 19 [2021-08-06 19:29:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:36,629 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 203 transitions. [2021-08-06 19:29:36,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:36,629 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 203 transitions. [2021-08-06 19:29:36,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 19:29:36,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:36,630 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:36,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:36,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:36,846 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:36,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1310880774, now seen corresponding path program 2 times [2021-08-06 19:29:36,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:36,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587394132] [2021-08-06 19:29:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:36,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:36,911 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 19:29:36,913 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 19:29:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:36,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:36,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587394132] [2021-08-06 19:29:36,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587394132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:36,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934574410] [2021-08-06 19:29:36,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:29:36,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:36,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:36,941 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:36,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 19:29:37,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:29:37,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:37,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:29:37,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:37,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934574410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:37,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:37,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-06 19:29:37,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831294408] [2021-08-06 19:29:37,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 19:29:37,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:37,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 19:29:37,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 19:29:37,260 INFO L87 Difference]: Start difference. First operand 104 states and 203 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:37,311 INFO L93 Difference]: Finished difference Result 179 states and 318 transitions. [2021-08-06 19:29:37,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 19:29:37,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 19:29:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:37,312 INFO L225 Difference]: With dead ends: 179 [2021-08-06 19:29:37,312 INFO L226 Difference]: Without dead ends: 169 [2021-08-06 19:29:37,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:29:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-06 19:29:37,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 121. [2021-08-06 19:29:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.9833333333333334) internal successors, (238), 120 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 238 transitions. [2021-08-06 19:29:37,316 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 238 transitions. Word has length 19 [2021-08-06 19:29:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:37,316 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 238 transitions. [2021-08-06 19:29:37,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 238 transitions. [2021-08-06 19:29:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:37,317 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:37,317 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:37,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:37,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:37,533 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:37,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:37,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2020333864, now seen corresponding path program 3 times [2021-08-06 19:29:37,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:37,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538674601] [2021-08-06 19:29:37,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:37,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:37,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:37,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:37,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538674601] [2021-08-06 19:29:37,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538674601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:37,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286409643] [2021-08-06 19:29:37,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:29:37,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:37,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:37,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:37,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 19:29:37,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:29:37,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:37,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:29:37,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:37,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286409643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:37,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:37,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 19:29:37,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109469706] [2021-08-06 19:29:37,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:29:37,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:37,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:29:37,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:29:37,848 INFO L87 Difference]: Start difference. First operand 121 states and 238 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:37,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:37,953 INFO L93 Difference]: Finished difference Result 297 states and 552 transitions. [2021-08-06 19:29:37,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:29:37,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 21 [2021-08-06 19:29:37,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:37,954 INFO L225 Difference]: With dead ends: 297 [2021-08-06 19:29:37,954 INFO L226 Difference]: Without dead ends: 297 [2021-08-06 19:29:37,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:29:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-08-06 19:29:37,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 183. [2021-08-06 19:29:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.0494505494505493) internal successors, (373), 182 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:37,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 373 transitions. [2021-08-06 19:29:37,959 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 373 transitions. Word has length 21 [2021-08-06 19:29:37,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:37,959 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 373 transitions. [2021-08-06 19:29:37,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 373 transitions. [2021-08-06 19:29:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:37,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:37,960 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] [2021-08-06 19:29:37,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:38,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:38,163 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:38,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1967736664, now seen corresponding path program 1 times [2021-08-06 19:29:38,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:38,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900910309] [2021-08-06 19:29:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:38,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:38,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:38,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900910309] [2021-08-06 19:29:38,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900910309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:38,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140374530] [2021-08-06 19:29:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:38,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:38,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:38,220 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:38,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 19:29:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:38,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:29:38,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:38,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:38,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140374530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:38,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:38,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 19:29:38,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616782137] [2021-08-06 19:29:38,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:29:38,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:38,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:29:38,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:38,625 INFO L87 Difference]: Start difference. First operand 183 states and 373 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:38,885 INFO L93 Difference]: Finished difference Result 422 states and 792 transitions. [2021-08-06 19:29:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:29:38,885 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 21 [2021-08-06 19:29:38,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:38,887 INFO L225 Difference]: With dead ends: 422 [2021-08-06 19:29:38,887 INFO L226 Difference]: Without dead ends: 422 [2021-08-06 19:29:38,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:29:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-08-06 19:29:38,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 199. [2021-08-06 19:29:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.111111111111111) internal successors, (418), 198 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:38,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 418 transitions. [2021-08-06 19:29:38,895 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 418 transitions. Word has length 21 [2021-08-06 19:29:38,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:38,895 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 418 transitions. [2021-08-06 19:29:38,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:38,896 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 418 transitions. [2021-08-06 19:29:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:38,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:38,896 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:38,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:39,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:39,112 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:39,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1937403556, now seen corresponding path program 4 times [2021-08-06 19:29:39,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:39,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931303920] [2021-08-06 19:29:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:39,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:39,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:39,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931303920] [2021-08-06 19:29:39,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931303920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:39,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495718933] [2021-08-06 19:29:39,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:29:39,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:39,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:39,163 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:39,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 19:29:39,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:29:39,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:39,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:29:39,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:39,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495718933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:39,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:39,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 19:29:39,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903422168] [2021-08-06 19:29:39,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:29:39,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:29:39,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:29:39,533 INFO L87 Difference]: Start difference. First operand 199 states and 418 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:40,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:40,186 INFO L93 Difference]: Finished difference Result 454 states and 844 transitions. [2021-08-06 19:29:40,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:29:40,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-06 19:29:40,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:40,189 INFO L225 Difference]: With dead ends: 454 [2021-08-06 19:29:40,189 INFO L226 Difference]: Without dead ends: 454 [2021-08-06 19:29:40,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 479.2ms TimeCoverageRelationStatistics Valid=406, Invalid=1000, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:29:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-06 19:29:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 227. [2021-08-06 19:29:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.088495575221239) internal successors, (472), 226 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 472 transitions. [2021-08-06 19:29:40,196 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 472 transitions. Word has length 21 [2021-08-06 19:29:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:40,196 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 472 transitions. [2021-08-06 19:29:40,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 472 transitions. [2021-08-06 19:29:40,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:40,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:40,197 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] [2021-08-06 19:29:40,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:40,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:40,414 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:40,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1043001436, now seen corresponding path program 2 times [2021-08-06 19:29:40,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:40,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776711385] [2021-08-06 19:29:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:40,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:40,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:40,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:40,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776711385] [2021-08-06 19:29:40,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776711385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:40,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914837798] [2021-08-06 19:29:40,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:29:40,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:40,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:40,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:40,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 19:29:40,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:29:40,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:40,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:29:40,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:40,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914837798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:40,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:40,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 19:29:40,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36508230] [2021-08-06 19:29:40,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:29:40,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:40,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:29:40,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:40,912 INFO L87 Difference]: Start difference. First operand 227 states and 472 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:41,296 INFO L93 Difference]: Finished difference Result 976 states and 1936 transitions. [2021-08-06 19:29:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:29:41,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 21 [2021-08-06 19:29:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:41,300 INFO L225 Difference]: With dead ends: 976 [2021-08-06 19:29:41,300 INFO L226 Difference]: Without dead ends: 976 [2021-08-06 19:29:41,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:29:41,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-08-06 19:29:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 345. [2021-08-06 19:29:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.2005813953488373) internal successors, (757), 344 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 757 transitions. [2021-08-06 19:29:41,311 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 757 transitions. Word has length 21 [2021-08-06 19:29:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:41,311 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 757 transitions. [2021-08-06 19:29:41,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 757 transitions. [2021-08-06 19:29:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:41,312 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:41,312 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:41,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:41,526 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,SelfDestructingSolverStorable11 [2021-08-06 19:29:41,527 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:41,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:41,527 INFO L82 PathProgramCache]: Analyzing trace with hash -785178972, now seen corresponding path program 5 times [2021-08-06 19:29:41,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:41,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466297855] [2021-08-06 19:29:41,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:41,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:41,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:41,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466297855] [2021-08-06 19:29:41,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466297855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:41,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567224466] [2021-08-06 19:29:41,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:29:41,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:41,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:41,574 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:41,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 19:29:41,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:29:41,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:41,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:29:41,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:41,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567224466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:41,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:41,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 19:29:41,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582156915] [2021-08-06 19:29:41,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:29:41,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:41,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:29:41,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:29:41,989 INFO L87 Difference]: Start difference. First operand 345 states and 757 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:42,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:42,355 INFO L93 Difference]: Finished difference Result 574 states and 1110 transitions. [2021-08-06 19:29:42,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 19:29:42,355 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-06 19:29:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:42,357 INFO L225 Difference]: With dead ends: 574 [2021-08-06 19:29:42,357 INFO L226 Difference]: Without dead ends: 568 [2021-08-06 19:29:42,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2021-08-06 19:29:42,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-08-06 19:29:42,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 363. [2021-08-06 19:29:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.179558011049724) internal successors, (789), 362 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 789 transitions. [2021-08-06 19:29:42,365 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 789 transitions. Word has length 21 [2021-08-06 19:29:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:42,366 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 789 transitions. [2021-08-06 19:29:42,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 789 transitions. [2021-08-06 19:29:42,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:42,367 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:42,367 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:42,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:42,583 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,SelfDestructingSolverStorable12 [2021-08-06 19:29:42,583 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:42,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:42,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2018293412, now seen corresponding path program 6 times [2021-08-06 19:29:42,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:42,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863625573] [2021-08-06 19:29:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:42,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:42,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:42,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863625573] [2021-08-06 19:29:42,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863625573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:42,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697811446] [2021-08-06 19:29:42,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:29:42,640 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:42,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:42,641 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:42,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 19:29:42,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:29:42,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:42,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:29:42,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:43,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697811446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:43,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:43,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 19:29:43,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533367591] [2021-08-06 19:29:43,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:29:43,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:43,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:29:43,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:29:43,072 INFO L87 Difference]: Start difference. First operand 363 states and 789 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:43,645 INFO L93 Difference]: Finished difference Result 577 states and 1143 transitions. [2021-08-06 19:29:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:29:43,646 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-06 19:29:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:43,648 INFO L225 Difference]: With dead ends: 577 [2021-08-06 19:29:43,648 INFO L226 Difference]: Without dead ends: 577 [2021-08-06 19:29:43,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 433.9ms TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:29:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-06 19:29:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 337. [2021-08-06 19:29:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.205357142857143) internal successors, (741), 336 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 741 transitions. [2021-08-06 19:29:43,663 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 741 transitions. Word has length 21 [2021-08-06 19:29:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:43,664 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 741 transitions. [2021-08-06 19:29:43,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 741 transitions. [2021-08-06 19:29:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:43,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:43,665 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:43,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:43,881 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,SelfDestructingSolverStorable13 [2021-08-06 19:29:43,882 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:43,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:43,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1551905116, now seen corresponding path program 7 times [2021-08-06 19:29:43,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:43,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621881202] [2021-08-06 19:29:43,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:43,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:43,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:43,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621881202] [2021-08-06 19:29:43,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621881202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:43,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230833133] [2021-08-06 19:29:43,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:29:43,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:43,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:43,931 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:43,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 19:29:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:44,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:29:44,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:44,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230833133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:44,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:44,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 19:29:44,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227021860] [2021-08-06 19:29:44,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:29:44,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:44,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:29:44,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:29:44,386 INFO L87 Difference]: Start difference. First operand 337 states and 741 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:44,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:44,647 INFO L93 Difference]: Finished difference Result 484 states and 973 transitions. [2021-08-06 19:29:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 19:29:44,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-06 19:29:44,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:44,649 INFO L225 Difference]: With dead ends: 484 [2021-08-06 19:29:44,649 INFO L226 Difference]: Without dead ends: 472 [2021-08-06 19:29:44,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:29:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-06 19:29:44,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 359. [2021-08-06 19:29:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.189944134078212) internal successors, (784), 358 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 784 transitions. [2021-08-06 19:29:44,656 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 784 transitions. Word has length 21 [2021-08-06 19:29:44,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:44,656 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 784 transitions. [2021-08-06 19:29:44,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 784 transitions. [2021-08-06 19:29:44,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:44,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:44,657 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:44,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:44,886 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,SelfDestructingSolverStorable14 [2021-08-06 19:29:44,887 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:44,887 INFO L82 PathProgramCache]: Analyzing trace with hash -359438684, now seen corresponding path program 8 times [2021-08-06 19:29:44,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:44,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625850394] [2021-08-06 19:29:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:44,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:44,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:44,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625850394] [2021-08-06 19:29:44,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625850394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:44,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948629228] [2021-08-06 19:29:44,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:29:44,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:44,941 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:44,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 19:29:45,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:29:45,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:45,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:29:45,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:45,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948629228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:45,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:45,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 19:29:45,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552665516] [2021-08-06 19:29:45,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:29:45,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:45,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:29:45,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:29:45,476 INFO L87 Difference]: Start difference. First operand 359 states and 784 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:45,795 INFO L93 Difference]: Finished difference Result 612 states and 1181 transitions. [2021-08-06 19:29:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:29:45,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-06 19:29:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:45,797 INFO L225 Difference]: With dead ends: 612 [2021-08-06 19:29:45,797 INFO L226 Difference]: Without dead ends: 604 [2021-08-06 19:29:45,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 254.4ms TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:29:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-06 19:29:45,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 401. [2021-08-06 19:29:45,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.185) internal successors, (874), 400 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 874 transitions. [2021-08-06 19:29:45,804 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 874 transitions. Word has length 21 [2021-08-06 19:29:45,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:45,805 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 874 transitions. [2021-08-06 19:29:45,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:45,805 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 874 transitions. [2021-08-06 19:29:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:45,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:45,806 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:45,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:46,021 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,SelfDestructingSolverStorable15 [2021-08-06 19:29:46,022 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:46,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1850933596, now seen corresponding path program 9 times [2021-08-06 19:29:46,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:46,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967651798] [2021-08-06 19:29:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:46,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:46,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:46,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967651798] [2021-08-06 19:29:46,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967651798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:46,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849909029] [2021-08-06 19:29:46,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:29:46,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:46,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:46,067 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:46,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 19:29:46,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:29:46,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:46,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:29:46,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:46,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849909029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:46,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:46,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 19:29:46,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663445443] [2021-08-06 19:29:46,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:29:46,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:46,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:29:46,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:29:46,545 INFO L87 Difference]: Start difference. First operand 401 states and 874 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:47,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:47,124 INFO L93 Difference]: Finished difference Result 631 states and 1224 transitions. [2021-08-06 19:29:47,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 19:29:47,125 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-08-06 19:29:47,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:47,126 INFO L225 Difference]: With dead ends: 631 [2021-08-06 19:29:47,127 INFO L226 Difference]: Without dead ends: 631 [2021-08-06 19:29:47,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 439.5ms TimeCoverageRelationStatistics Valid=371, Invalid=961, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:29:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-08-06 19:29:47,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 401. [2021-08-06 19:29:47,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.185) internal successors, (874), 400 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 874 transitions. [2021-08-06 19:29:47,134 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 874 transitions. Word has length 21 [2021-08-06 19:29:47,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:47,134 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 874 transitions. [2021-08-06 19:29:47,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:47,134 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 874 transitions. [2021-08-06 19:29:47,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:47,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:47,135 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] [2021-08-06 19:29:47,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:47,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 19:29:47,345 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:47,346 INFO L82 PathProgramCache]: Analyzing trace with hash 545695588, now seen corresponding path program 3 times [2021-08-06 19:29:47,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:47,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782636092] [2021-08-06 19:29:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:47,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:47,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:47,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782636092] [2021-08-06 19:29:47,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782636092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:47,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887753487] [2021-08-06 19:29:47,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:29:47,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:47,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:47,429 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:47,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 19:29:47,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 19:29:47,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:47,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:29:47,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:47,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:47,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887753487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:47,953 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:47,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-08-06 19:29:47,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795586622] [2021-08-06 19:29:47,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:29:47,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:47,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:29:47,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:29:47,954 INFO L87 Difference]: Start difference. First operand 401 states and 874 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:48,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:48,251 INFO L93 Difference]: Finished difference Result 669 states and 1358 transitions. [2021-08-06 19:29:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 19:29:48,251 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-08-06 19:29:48,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:48,253 INFO L225 Difference]: With dead ends: 669 [2021-08-06 19:29:48,253 INFO L226 Difference]: Without dead ends: 669 [2021-08-06 19:29:48,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:29:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-08-06 19:29:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 414. [2021-08-06 19:29:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.1670702179176757) internal successors, (895), 413 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 895 transitions. [2021-08-06 19:29:48,260 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 895 transitions. Word has length 21 [2021-08-06 19:29:48,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:48,260 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 895 transitions. [2021-08-06 19:29:48,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:48,260 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 895 transitions. [2021-08-06 19:29:48,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:48,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:48,261 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:48,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:48,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:48,477 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:48,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:48,477 INFO L82 PathProgramCache]: Analyzing trace with hash 902281256, now seen corresponding path program 1 times [2021-08-06 19:29:48,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:48,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953185821] [2021-08-06 19:29:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:48,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:48,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:48,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953185821] [2021-08-06 19:29:48,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953185821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:48,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359082636] [2021-08-06 19:29:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:48,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:48,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:48,511 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:48,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 19:29:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:48,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:29:48,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:48,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359082636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:48,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:48,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 19:29:48,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635054577] [2021-08-06 19:29:48,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:29:48,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:48,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:29:48,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:29:48,952 INFO L87 Difference]: Start difference. First operand 414 states and 895 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:49,069 INFO L93 Difference]: Finished difference Result 778 states and 1591 transitions. [2021-08-06 19:29:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:29:49,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 21 [2021-08-06 19:29:49,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:49,071 INFO L225 Difference]: With dead ends: 778 [2021-08-06 19:29:49,071 INFO L226 Difference]: Without dead ends: 778 [2021-08-06 19:29:49,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:29:49,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-08-06 19:29:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 478. [2021-08-06 19:29:49,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.19916142557652) internal successors, (1049), 477 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1049 transitions. [2021-08-06 19:29:49,079 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1049 transitions. Word has length 21 [2021-08-06 19:29:49,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:49,080 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 1049 transitions. [2021-08-06 19:29:49,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1049 transitions. [2021-08-06 19:29:49,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:49,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:49,082 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] [2021-08-06 19:29:49,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:49,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:49,299 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:49,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:49,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1169735332, now seen corresponding path program 4 times [2021-08-06 19:29:49,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:49,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809676747] [2021-08-06 19:29:49,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:49,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:49,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:49,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809676747] [2021-08-06 19:29:49,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809676747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:49,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514206462] [2021-08-06 19:29:49,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:29:49,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:49,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:49,347 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:49,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 19:29:49,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:29:49,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:49,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:29:49,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:49,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514206462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:49,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:49,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 19:29:49,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808312817] [2021-08-06 19:29:49,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:29:49,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:49,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:29:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:49,905 INFO L87 Difference]: Start difference. First operand 478 states and 1049 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:50,310 INFO L93 Difference]: Finished difference Result 1345 states and 2794 transitions. [2021-08-06 19:29:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:29:50,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 21 [2021-08-06 19:29:50,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:50,314 INFO L225 Difference]: With dead ends: 1345 [2021-08-06 19:29:50,314 INFO L226 Difference]: Without dead ends: 1345 [2021-08-06 19:29:50,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 277.7ms TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2021-08-06 19:29:50,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-08-06 19:29:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 700. [2021-08-06 19:29:50,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 699 states have (on average 2.2660944206008584) internal successors, (1584), 699 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1584 transitions. [2021-08-06 19:29:50,327 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1584 transitions. Word has length 21 [2021-08-06 19:29:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:50,327 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 1584 transitions. [2021-08-06 19:29:50,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1584 transitions. [2021-08-06 19:29:50,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:50,328 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:50,328 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:50,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:50,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:50,541 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:50,541 INFO L82 PathProgramCache]: Analyzing trace with hash 853237732, now seen corresponding path program 10 times [2021-08-06 19:29:50,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:50,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64044868] [2021-08-06 19:29:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:50,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:50,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:50,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64044868] [2021-08-06 19:29:50,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64044868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:50,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673382372] [2021-08-06 19:29:50,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:29:50,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:50,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:50,576 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:50,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 19:29:50,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:29:50,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:50,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:29:50,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:51,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673382372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:51,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:51,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-06 19:29:51,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788755642] [2021-08-06 19:29:51,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:29:51,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:51,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:29:51,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:29:51,043 INFO L87 Difference]: Start difference. First operand 700 states and 1584 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:51,131 INFO L93 Difference]: Finished difference Result 1051 states and 2242 transitions. [2021-08-06 19:29:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:29:51,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 21 [2021-08-06 19:29:51,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:51,134 INFO L225 Difference]: With dead ends: 1051 [2021-08-06 19:29:51,134 INFO L226 Difference]: Without dead ends: 1051 [2021-08-06 19:29:51,135 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:29:51,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-08-06 19:29:51,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 859. [2021-08-06 19:29:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.2843822843822843) internal successors, (1960), 858 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1960 transitions. [2021-08-06 19:29:51,148 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1960 transitions. Word has length 21 [2021-08-06 19:29:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:51,148 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 1960 transitions. [2021-08-06 19:29:51,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:51,148 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1960 transitions. [2021-08-06 19:29:51,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:51,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:51,149 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] [2021-08-06 19:29:51,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:51,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:51,365 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:51,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1152345760, now seen corresponding path program 5 times [2021-08-06 19:29:51,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:51,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491892434] [2021-08-06 19:29:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:51,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:51,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:51,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491892434] [2021-08-06 19:29:51,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491892434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:51,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126578162] [2021-08-06 19:29:51,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:29:51,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:51,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:51,425 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:51,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 19:29:51,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:29:51,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:51,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:29:51,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:52,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126578162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:52,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:52,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 19:29:52,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577495096] [2021-08-06 19:29:52,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:29:52,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:52,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:29:52,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:52,037 INFO L87 Difference]: Start difference. First operand 859 states and 1960 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:52,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:52,502 INFO L93 Difference]: Finished difference Result 1647 states and 3480 transitions. [2021-08-06 19:29:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:29:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 21 [2021-08-06 19:29:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:52,509 INFO L225 Difference]: With dead ends: 1647 [2021-08-06 19:29:52,509 INFO L226 Difference]: Without dead ends: 1647 [2021-08-06 19:29:52,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 355.8ms TimeCoverageRelationStatistics Valid=221, Invalid=591, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:29:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-08-06 19:29:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 876. [2021-08-06 19:29:52,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.297142857142857) internal successors, (2010), 875 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2010 transitions. [2021-08-06 19:29:52,526 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2010 transitions. Word has length 21 [2021-08-06 19:29:52,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:52,527 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 2010 transitions. [2021-08-06 19:29:52,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2010 transitions. [2021-08-06 19:29:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:52,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:52,528 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] [2021-08-06 19:29:52,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:52,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:52,745 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:52,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1332194972, now seen corresponding path program 6 times [2021-08-06 19:29:52,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:52,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103889831] [2021-08-06 19:29:52,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:52,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:52,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:52,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103889831] [2021-08-06 19:29:52,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103889831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:52,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522890583] [2021-08-06 19:29:52,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:29:52,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:52,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:52,781 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:52,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 19:29:53,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:29:53,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:53,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 19:29:53,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:53,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522890583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:53,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:53,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-06 19:29:53,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643451649] [2021-08-06 19:29:53,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 19:29:53,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:53,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 19:29:53,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 19:29:53,389 INFO L87 Difference]: Start difference. First operand 876 states and 2010 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:53,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:53,724 INFO L93 Difference]: Finished difference Result 1614 states and 3424 transitions. [2021-08-06 19:29:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 19:29:53,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 21 [2021-08-06 19:29:53,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:53,728 INFO L225 Difference]: With dead ends: 1614 [2021-08-06 19:29:53,729 INFO L226 Difference]: Without dead ends: 1614 [2021-08-06 19:29:53,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-08-06 19:29:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-08-06 19:29:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 877. [2021-08-06 19:29:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 2.2922374429223744) internal successors, (2008), 876 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:53,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2008 transitions. [2021-08-06 19:29:53,748 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2008 transitions. Word has length 21 [2021-08-06 19:29:53,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:53,748 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 2008 transitions. [2021-08-06 19:29:53,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2008 transitions. [2021-08-06 19:29:53,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 19:29:53,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:53,750 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:53,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-06 19:29:53,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:53,971 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:53,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:53,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1439340320, now seen corresponding path program 2 times [2021-08-06 19:29:53,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:53,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386153954] [2021-08-06 19:29:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:53,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:54,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:54,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386153954] [2021-08-06 19:29:54,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386153954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:54,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391130040] [2021-08-06 19:29:54,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:29:54,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:54,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:54,002 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:54,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 19:29:54,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:29:54,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:54,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 19:29:54,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:54,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391130040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:54,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:54,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-06 19:29:54,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842295602] [2021-08-06 19:29:54,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 19:29:54,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:54,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 19:29:54,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-06 19:29:54,521 INFO L87 Difference]: Start difference. First operand 877 states and 2008 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:54,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:54,591 INFO L93 Difference]: Finished difference Result 1460 states and 3147 transitions. [2021-08-06 19:29:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 19:29:54,591 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 21 [2021-08-06 19:29:54,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:54,595 INFO L225 Difference]: With dead ends: 1460 [2021-08-06 19:29:54,595 INFO L226 Difference]: Without dead ends: 1460 [2021-08-06 19:29:54,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:29:54,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-08-06 19:29:54,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1000. [2021-08-06 19:29:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 999 states have (on average 2.3123123123123124) internal successors, (2310), 999 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 2310 transitions. [2021-08-06 19:29:54,612 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 2310 transitions. Word has length 21 [2021-08-06 19:29:54,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:54,613 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 2310 transitions. [2021-08-06 19:29:54,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:54,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 2310 transitions. [2021-08-06 19:29:54,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:29:54,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:54,614 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:54,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:54,828 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,SelfDestructingSolverStorable23 [2021-08-06 19:29:54,828 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:54,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:54,829 INFO L82 PathProgramCache]: Analyzing trace with hash -919423994, now seen corresponding path program 11 times [2021-08-06 19:29:54,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:54,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186516001] [2021-08-06 19:29:54,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:54,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:54,876 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 19:29:54,877 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 48.0 percent of original size [2021-08-06 19:29:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:54,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:54,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186516001] [2021-08-06 19:29:54,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186516001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:54,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443853790] [2021-08-06 19:29:54,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:29:54,891 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:54,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:54,892 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:54,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 19:29:55,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:29:55,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:55,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:29:55,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:55,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443853790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:55,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:55,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-06 19:29:55,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076395955] [2021-08-06 19:29:55,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:29:55,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:55,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:29:55,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:55,622 INFO L87 Difference]: Start difference. First operand 1000 states and 2310 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:55,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:55,683 INFO L93 Difference]: Finished difference Result 1436 states and 3181 transitions. [2021-08-06 19:29:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:29:55,683 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:29:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:55,688 INFO L225 Difference]: With dead ends: 1436 [2021-08-06 19:29:55,688 INFO L226 Difference]: Without dead ends: 1426 [2021-08-06 19:29:55,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-08-06 19:29:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1280. [2021-08-06 19:29:55,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 2.3033620015637215) internal successors, (2946), 1279 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 2946 transitions. [2021-08-06 19:29:55,707 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 2946 transitions. Word has length 23 [2021-08-06 19:29:55,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:55,708 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 2946 transitions. [2021-08-06 19:29:55,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:55,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 2946 transitions. [2021-08-06 19:29:55,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:29:55,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:55,710 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:55,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-06 19:29:55,926 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,SelfDestructingSolverStorable24 [2021-08-06 19:29:55,926 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash -480157814, now seen corresponding path program 12 times [2021-08-06 19:29:55,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:55,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888976998] [2021-08-06 19:29:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:55,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:55,980 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 19:29:55,981 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 19:29:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:29:55,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:55,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888976998] [2021-08-06 19:29:55,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888976998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:55,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320263610] [2021-08-06 19:29:55,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:29:55,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:55,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:55,989 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:56,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 19:29:56,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:29:56,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:56,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:29:56,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:56,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320263610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:56,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:56,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-08-06 19:29:56,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041746549] [2021-08-06 19:29:56,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:29:56,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:56,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:29:56,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:56,731 INFO L87 Difference]: Start difference. First operand 1280 states and 2946 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:56,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:56,802 INFO L93 Difference]: Finished difference Result 1723 states and 3810 transitions. [2021-08-06 19:29:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 19:29:56,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:29:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:56,807 INFO L225 Difference]: With dead ends: 1723 [2021-08-06 19:29:56,808 INFO L226 Difference]: Without dead ends: 1711 [2021-08-06 19:29:56,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:29:56,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-08-06 19:29:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1578. [2021-08-06 19:29:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 2.2885225110970198) internal successors, (3609), 1577 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 3609 transitions. [2021-08-06 19:29:56,830 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 3609 transitions. Word has length 23 [2021-08-06 19:29:56,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:56,830 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 3609 transitions. [2021-08-06 19:29:56,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 3609 transitions. [2021-08-06 19:29:56,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 19:29:56,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:56,833 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:56,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-06 19:29:57,048 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,SelfDestructingSolverStorable25 [2021-08-06 19:29:57,049 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:57,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:57,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1420753530, now seen corresponding path program 13 times [2021-08-06 19:29:57,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:57,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336797740] [2021-08-06 19:29:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:57,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:57,121 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 19:29:57,122 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 48.1 percent of original size [2021-08-06 19:29:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:57,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:57,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336797740] [2021-08-06 19:29:57,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336797740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:57,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010155700] [2021-08-06 19:29:57,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:29:57,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:57,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:57,134 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:57,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 19:29:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:57,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 19:29:57,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:57,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010155700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:57,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:57,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-06 19:29:57,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062118215] [2021-08-06 19:29:57,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 19:29:57,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:57,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 19:29:57,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-06 19:29:57,876 INFO L87 Difference]: Start difference. First operand 1578 states and 3609 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:58,003 INFO L93 Difference]: Finished difference Result 1795 states and 3995 transitions. [2021-08-06 19:29:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 19:29:58,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 19:29:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:58,008 INFO L225 Difference]: With dead ends: 1795 [2021-08-06 19:29:58,008 INFO L226 Difference]: Without dead ends: 1785 [2021-08-06 19:29:58,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:29:58,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-08-06 19:29:58,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1643. [2021-08-06 19:29:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.2801461632155906) internal successors, (3744), 1642 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:58,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 3744 transitions. [2021-08-06 19:29:58,032 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 3744 transitions. Word has length 23 [2021-08-06 19:29:58,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:58,032 INFO L470 AbstractCegarLoop]: Abstraction has 1643 states and 3744 transitions. [2021-08-06 19:29:58,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:58,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 3744 transitions. [2021-08-06 19:29:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:29:58,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:58,035 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:58,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-06 19:29:58,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:58,252 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:58,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:58,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1846597400, now seen corresponding path program 14 times [2021-08-06 19:29:58,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:58,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888391531] [2021-08-06 19:29:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:58,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:58,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:58,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888391531] [2021-08-06 19:29:58,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888391531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:58,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342246161] [2021-08-06 19:29:58,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:29:58,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:58,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:58,303 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:58,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 19:29:58,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:29:58,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:29:58,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:29:58,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:29:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:58,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342246161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:58,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:29:58,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:29:58,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844422284] [2021-08-06 19:29:58,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:29:58,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:29:58,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:29:58,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:29:58,976 INFO L87 Difference]: Start difference. First operand 1643 states and 3744 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:29:59,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:29:59,135 INFO L93 Difference]: Finished difference Result 2355 states and 5199 transitions. [2021-08-06 19:29:59,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:29:59,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:29:59,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:29:59,141 INFO L225 Difference]: With dead ends: 2355 [2021-08-06 19:29:59,142 INFO L226 Difference]: Without dead ends: 2355 [2021-08-06 19:29:59,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:29:59,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-08-06 19:29:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 1750. [2021-08-06 19:29:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 2.262435677530017) internal successors, (3957), 1749 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:29:59,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 3957 transitions. [2021-08-06 19:29:59,166 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 3957 transitions. Word has length 25 [2021-08-06 19:29:59,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:29:59,167 INFO L470 AbstractCegarLoop]: Abstraction has 1750 states and 3957 transitions. [2021-08-06 19:29:59,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:29:59,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 3957 transitions. [2021-08-06 19:29:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:29:59,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:29:59,170 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:29:59,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 19:29:59,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 19:29:59,386 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:29:59,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:29:59,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1023420520, now seen corresponding path program 7 times [2021-08-06 19:29:59,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:29:59,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703202493] [2021-08-06 19:29:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:29:59,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:29:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:29:59,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:29:59,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703202493] [2021-08-06 19:29:59,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703202493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:29:59,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752409624] [2021-08-06 19:29:59,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:29:59,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:29:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:29:59,443 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:29:59,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 19:29:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:29:59,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:29:59,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:00,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752409624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:00,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:00,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:30:00,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785633171] [2021-08-06 19:30:00,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:30:00,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:00,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:30:00,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:00,266 INFO L87 Difference]: Start difference. First operand 1750 states and 3957 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:00,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:00,703 INFO L93 Difference]: Finished difference Result 2792 states and 6015 transitions. [2021-08-06 19:30:00,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:30:00,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:30:00,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:00,709 INFO L225 Difference]: With dead ends: 2792 [2021-08-06 19:30:00,709 INFO L226 Difference]: Without dead ends: 2792 [2021-08-06 19:30:00,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=230, Invalid=762, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:30:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2021-08-06 19:30:00,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 1833. [2021-08-06 19:30:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 2.2685589519650655) internal successors, (4156), 1832 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:00,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 4156 transitions. [2021-08-06 19:30:00,736 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 4156 transitions. Word has length 25 [2021-08-06 19:30:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:00,737 INFO L470 AbstractCegarLoop]: Abstraction has 1833 states and 4156 transitions. [2021-08-06 19:30:00,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:00,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 4156 transitions. [2021-08-06 19:30:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:00,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:00,739 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:00,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 19:30:00,956 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,SelfDestructingSolverStorable28 [2021-08-06 19:30:00,956 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:00,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:00,956 INFO L82 PathProgramCache]: Analyzing trace with hash 61755236, now seen corresponding path program 15 times [2021-08-06 19:30:00,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:00,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814280647] [2021-08-06 19:30:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:00,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:01,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:01,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814280647] [2021-08-06 19:30:01,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814280647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:01,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122884765] [2021-08-06 19:30:01,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:30:01,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:01,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:01,028 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:01,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 19:30:01,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:30:01,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:01,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:30:01,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:02,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122884765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:02,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:02,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:30:02,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840856426] [2021-08-06 19:30:02,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:30:02,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:02,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:30:02,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:30:02,043 INFO L87 Difference]: Start difference. First operand 1833 states and 4156 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:30:03,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:03,200 INFO L93 Difference]: Finished difference Result 3082 states and 6641 transitions. [2021-08-06 19:30:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 19:30:03,200 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:30:03,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:03,206 INFO L225 Difference]: With dead ends: 3082 [2021-08-06 19:30:03,206 INFO L226 Difference]: Without dead ends: 3082 [2021-08-06 19:30:03,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 941.3ms TimeCoverageRelationStatistics Valid=1002, Invalid=2658, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 19:30:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2021-08-06 19:30:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 2179. [2021-08-06 19:30:03,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 2.286501377410468) internal successors, (4980), 2178 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 4980 transitions. [2021-08-06 19:30:03,256 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 4980 transitions. Word has length 25 [2021-08-06 19:30:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:03,256 INFO L470 AbstractCegarLoop]: Abstraction has 2179 states and 4980 transitions. [2021-08-06 19:30:03,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:30:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 4980 transitions. [2021-08-06 19:30:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:03,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:03,259 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:03,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:03,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:03,477 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:03,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1376317540, now seen corresponding path program 8 times [2021-08-06 19:30:03,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:03,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660731594] [2021-08-06 19:30:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:03,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:03,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:03,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660731594] [2021-08-06 19:30:03,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660731594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:03,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621648526] [2021-08-06 19:30:03,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:30:03,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:03,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:03,541 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:03,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 19:30:04,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:30:04,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:30:04,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:04,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621648526] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:04,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:04,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:30:04,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132733074] [2021-08-06 19:30:04,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:30:04,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:04,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:30:04,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:04,507 INFO L87 Difference]: Start difference. First operand 2179 states and 4980 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:05,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:05,614 INFO L93 Difference]: Finished difference Result 6158 states and 13306 transitions. [2021-08-06 19:30:05,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 19:30:05,615 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:30:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:05,637 INFO L225 Difference]: With dead ends: 6158 [2021-08-06 19:30:05,637 INFO L226 Difference]: Without dead ends: 6158 [2021-08-06 19:30:05,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 819.5ms TimeCoverageRelationStatistics Valid=651, Invalid=2319, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 19:30:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6158 states. [2021-08-06 19:30:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6158 to 2596. [2021-08-06 19:30:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2595 states have (on average 2.2940269749518305) internal successors, (5953), 2595 states have internal predecessors, (5953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 5953 transitions. [2021-08-06 19:30:05,729 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 5953 transitions. Word has length 25 [2021-08-06 19:30:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:05,729 INFO L470 AbstractCegarLoop]: Abstraction has 2596 states and 5953 transitions. [2021-08-06 19:30:05,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:05,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 5953 transitions. [2021-08-06 19:30:05,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:05,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:05,733 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:05,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:05,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:05,949 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:05,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:05,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1634140004, now seen corresponding path program 16 times [2021-08-06 19:30:05,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:05,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078704041] [2021-08-06 19:30:05,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:05,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:06,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:06,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078704041] [2021-08-06 19:30:06,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078704041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:06,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392234113] [2021-08-06 19:30:06,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:06,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:06,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:06,009 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:06,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 19:30:06,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:30:06,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:06,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:30:06,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:06,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392234113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:06,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:06,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:30:06,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572364011] [2021-08-06 19:30:06,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:30:06,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:06,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:30:06,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:30:06,982 INFO L87 Difference]: Start difference. First operand 2596 states and 5953 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:30:07,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:07,690 INFO L93 Difference]: Finished difference Result 3534 states and 7618 transitions. [2021-08-06 19:30:07,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 19:30:07,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:30:07,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:07,699 INFO L225 Difference]: With dead ends: 3534 [2021-08-06 19:30:07,699 INFO L226 Difference]: Without dead ends: 3528 [2021-08-06 19:30:07,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 571.0ms TimeCoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 19:30:07,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2021-08-06 19:30:07,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 2638. [2021-08-06 19:30:07,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.291998483124763) internal successors, (6044), 2637 states have internal predecessors, (6044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 6044 transitions. [2021-08-06 19:30:07,741 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 6044 transitions. Word has length 25 [2021-08-06 19:30:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:07,742 INFO L470 AbstractCegarLoop]: Abstraction has 2638 states and 6044 transitions. [2021-08-06 19:30:07,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:30:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 6044 transitions. [2021-08-06 19:30:07,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:07,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:07,745 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:07,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:07,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:07,956 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:07,956 INFO L82 PathProgramCache]: Analyzing trace with hash 142645092, now seen corresponding path program 17 times [2021-08-06 19:30:07,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:07,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469921867] [2021-08-06 19:30:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:07,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:07,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:08,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:08,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469921867] [2021-08-06 19:30:08,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469921867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:08,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743532639] [2021-08-06 19:30:08,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:30:08,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:08,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:08,004 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:08,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 19:30:08,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:30:08,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:08,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:30:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:08,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743532639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:08,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:08,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:30:08,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493467927] [2021-08-06 19:30:08,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:30:08,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:08,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:30:08,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:30:08,911 INFO L87 Difference]: Start difference. First operand 2638 states and 6044 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:30:10,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:10,280 INFO L93 Difference]: Finished difference Result 3574 states and 7702 transitions. [2021-08-06 19:30:10,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 19:30:10,280 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:30:10,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:10,285 INFO L225 Difference]: With dead ends: 3574 [2021-08-06 19:30:10,285 INFO L226 Difference]: Without dead ends: 3574 [2021-08-06 19:30:10,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1045.0ms TimeCoverageRelationStatistics Valid=1100, Invalid=3060, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 19:30:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2021-08-06 19:30:10,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 2473. [2021-08-06 19:30:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 2.2851941747572817) internal successors, (5649), 2472 states have internal predecessors, (5649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:10,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 5649 transitions. [2021-08-06 19:30:10,324 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 5649 transitions. Word has length 25 [2021-08-06 19:30:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:10,324 INFO L470 AbstractCegarLoop]: Abstraction has 2473 states and 5649 transitions. [2021-08-06 19:30:10,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:30:10,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 5649 transitions. [2021-08-06 19:30:10,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:10,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:10,334 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:10,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:10,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:10,545 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash 867413860, now seen corresponding path program 18 times [2021-08-06 19:30:10,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:10,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216325738] [2021-08-06 19:30:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:10,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:10,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:10,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216325738] [2021-08-06 19:30:10,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216325738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:10,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417902348] [2021-08-06 19:30:10,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:30:10,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:10,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:10,607 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:10,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 19:30:11,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:30:11,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:11,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:30:11,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:11,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417902348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:11,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:11,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:30:11,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339706026] [2021-08-06 19:30:11,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:30:11,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:11,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:30:11,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:30:11,569 INFO L87 Difference]: Start difference. First operand 2473 states and 5649 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:30:12,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:12,173 INFO L93 Difference]: Finished difference Result 4198 states and 9107 transitions. [2021-08-06 19:30:12,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 19:30:12,174 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:30:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:12,180 INFO L225 Difference]: With dead ends: 4198 [2021-08-06 19:30:12,180 INFO L226 Difference]: Without dead ends: 4180 [2021-08-06 19:30:12,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 502.8ms TimeCoverageRelationStatistics Valid=400, Invalid=1322, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 19:30:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2021-08-06 19:30:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 3042. [2021-08-06 19:30:12,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3042 states, 3041 states have (on average 2.299572509043078) internal successors, (6993), 3041 states have internal predecessors, (6993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:12,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3042 states to 3042 states and 6993 transitions. [2021-08-06 19:30:12,228 INFO L78 Accepts]: Start accepts. Automaton has 3042 states and 6993 transitions. Word has length 25 [2021-08-06 19:30:12,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:12,228 INFO L470 AbstractCegarLoop]: Abstraction has 3042 states and 6993 transitions. [2021-08-06 19:30:12,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:30:12,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3042 states and 6993 transitions. [2021-08-06 19:30:12,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:12,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:12,233 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:12,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:12,450 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,SelfDestructingSolverStorable33 [2021-08-06 19:30:12,450 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:12,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:12,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2059880292, now seen corresponding path program 19 times [2021-08-06 19:30:12,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:12,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727106217] [2021-08-06 19:30:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:12,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:12,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:12,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727106217] [2021-08-06 19:30:12,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727106217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:12,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365510087] [2021-08-06 19:30:12,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:12,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:12,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:12,512 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:12,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 19:30:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:13,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:30:13,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:13,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365510087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:13,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:13,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:30:13,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885102214] [2021-08-06 19:30:13,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:30:13,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:13,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:30:13,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:30:13,480 INFO L87 Difference]: Start difference. First operand 3042 states and 6993 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:30:14,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:14,183 INFO L93 Difference]: Finished difference Result 4418 states and 9487 transitions. [2021-08-06 19:30:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 19:30:14,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:30:14,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:14,189 INFO L225 Difference]: With dead ends: 4418 [2021-08-06 19:30:14,190 INFO L226 Difference]: Without dead ends: 4406 [2021-08-06 19:30:14,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 540.4ms TimeCoverageRelationStatistics Valid=477, Invalid=1503, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 19:30:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4406 states. [2021-08-06 19:30:14,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4406 to 3332. [2021-08-06 19:30:14,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 2.290003002101471) internal successors, (7628), 3331 states have internal predecessors, (7628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 7628 transitions. [2021-08-06 19:30:14,243 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 7628 transitions. Word has length 25 [2021-08-06 19:30:14,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:14,244 INFO L470 AbstractCegarLoop]: Abstraction has 3332 states and 7628 transitions. [2021-08-06 19:30:14,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:30:14,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 7628 transitions. [2021-08-06 19:30:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:14,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:14,249 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:14,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:14,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:14,461 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:14,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:14,461 INFO L82 PathProgramCache]: Analyzing trace with hash 568385380, now seen corresponding path program 20 times [2021-08-06 19:30:14,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:14,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142121967] [2021-08-06 19:30:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:14,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:14,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:14,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142121967] [2021-08-06 19:30:14,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142121967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:14,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305820397] [2021-08-06 19:30:14,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:30:14,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:14,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:14,528 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:14,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 19:30:15,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:30:15,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:15,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:30:15,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:15,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305820397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:15,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:15,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:30:15,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546946486] [2021-08-06 19:30:15,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:30:15,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:15,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:30:15,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:30:15,533 INFO L87 Difference]: Start difference. First operand 3332 states and 7628 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:30:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:16,721 INFO L93 Difference]: Finished difference Result 4437 states and 9528 transitions. [2021-08-06 19:30:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-06 19:30:16,722 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:30:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:16,727 INFO L225 Difference]: With dead ends: 4437 [2021-08-06 19:30:16,727 INFO L226 Difference]: Without dead ends: 4437 [2021-08-06 19:30:16,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 952.9ms TimeCoverageRelationStatistics Valid=1040, Invalid=2866, Unknown=0, NotChecked=0, Total=3906 [2021-08-06 19:30:16,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4437 states. [2021-08-06 19:30:16,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4437 to 3174. [2021-08-06 19:30:16,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3174 states, 3173 states have (on average 2.300346675070911) internal successors, (7299), 3173 states have internal predecessors, (7299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 7299 transitions. [2021-08-06 19:30:16,771 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 7299 transitions. Word has length 25 [2021-08-06 19:30:16,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:16,771 INFO L470 AbstractCegarLoop]: Abstraction has 3174 states and 7299 transitions. [2021-08-06 19:30:16,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:30:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 7299 transitions. [2021-08-06 19:30:16,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:16,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:16,775 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:16,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:16,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:16,990 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:16,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:16,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1517002908, now seen corresponding path program 21 times [2021-08-06 19:30:16,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:16,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616512860] [2021-08-06 19:30:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:16,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:17,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:17,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616512860] [2021-08-06 19:30:17,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616512860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:17,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869786517] [2021-08-06 19:30:17,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:30:17,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:17,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:17,079 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:17,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 19:30:17,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:30:17,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:17,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:30:17,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:18,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869786517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:18,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:18,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 19:30:18,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587994168] [2021-08-06 19:30:18,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:30:18,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:18,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:30:18,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:30:18,105 INFO L87 Difference]: Start difference. First operand 3174 states and 7299 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:30:18,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:18,621 INFO L93 Difference]: Finished difference Result 4688 states and 10241 transitions. [2021-08-06 19:30:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 19:30:18,622 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 25 [2021-08-06 19:30:18,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:18,627 INFO L225 Difference]: With dead ends: 4688 [2021-08-06 19:30:18,627 INFO L226 Difference]: Without dead ends: 4668 [2021-08-06 19:30:18,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=360, Invalid=1122, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:30:18,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2021-08-06 19:30:18,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 3658. [2021-08-06 19:30:18,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 3657 states have (on average 2.3035274815422477) internal successors, (8424), 3657 states have internal predecessors, (8424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 8424 transitions. [2021-08-06 19:30:18,677 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 8424 transitions. Word has length 25 [2021-08-06 19:30:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:18,677 INFO L470 AbstractCegarLoop]: Abstraction has 3658 states and 8424 transitions. [2021-08-06 19:30:18,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:30:18,677 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 8424 transitions. [2021-08-06 19:30:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:18,682 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:18,682 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:18,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:18,883 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,SelfDestructingSolverStorable36 [2021-08-06 19:30:18,883 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:18,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:18,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1981937508, now seen corresponding path program 22 times [2021-08-06 19:30:18,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:18,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712032947] [2021-08-06 19:30:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:18,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:18,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:18,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712032947] [2021-08-06 19:30:18,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712032947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:18,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987781369] [2021-08-06 19:30:18,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:18,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:18,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:18,934 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:18,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 19:30:19,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:30:19,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:19,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:30:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:19,968 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:19,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987781369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:19,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:19,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 19:30:19,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750677285] [2021-08-06 19:30:19,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:30:19,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:19,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:30:19,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:30:19,969 INFO L87 Difference]: Start difference. First operand 3658 states and 8424 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:30:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:20,772 INFO L93 Difference]: Finished difference Result 4752 states and 10314 transitions. [2021-08-06 19:30:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 19:30:20,773 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 25 [2021-08-06 19:30:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:20,780 INFO L225 Difference]: With dead ends: 4752 [2021-08-06 19:30:20,780 INFO L226 Difference]: Without dead ends: 4722 [2021-08-06 19:30:20,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 635.4ms TimeCoverageRelationStatistics Valid=466, Invalid=1426, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 19:30:20,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4722 states. [2021-08-06 19:30:20,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4722 to 3852. [2021-08-06 19:30:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 2.299922098156323) internal successors, (8857), 3851 states have internal predecessors, (8857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 8857 transitions. [2021-08-06 19:30:20,837 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 8857 transitions. Word has length 25 [2021-08-06 19:30:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:20,838 INFO L470 AbstractCegarLoop]: Abstraction has 3852 states and 8857 transitions. [2021-08-06 19:30:20,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:30:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 8857 transitions. [2021-08-06 19:30:20,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:20,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:20,843 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:20,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-06 19:30:21,047 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,SelfDestructingSolverStorable37 [2021-08-06 19:30:21,047 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:21,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1120563356, now seen corresponding path program 23 times [2021-08-06 19:30:21,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:21,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126410776] [2021-08-06 19:30:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:21,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:21,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:21,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126410776] [2021-08-06 19:30:21,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126410776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:21,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774110814] [2021-08-06 19:30:21,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:30:21,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:21,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:21,108 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:21,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 19:30:21,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:30:21,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:21,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:30:21,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:22,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774110814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:22,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:22,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 19:30:22,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812606060] [2021-08-06 19:30:22,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:30:22,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:22,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:30:22,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:30:22,215 INFO L87 Difference]: Start difference. First operand 3852 states and 8857 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:30:23,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:23,002 INFO L93 Difference]: Finished difference Result 5175 states and 11104 transitions. [2021-08-06 19:30:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 19:30:23,003 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 25 [2021-08-06 19:30:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:23,010 INFO L225 Difference]: With dead ends: 5175 [2021-08-06 19:30:23,010 INFO L226 Difference]: Without dead ends: 5163 [2021-08-06 19:30:23,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 640.2ms TimeCoverageRelationStatistics Valid=557, Invalid=1699, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 19:30:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5163 states. [2021-08-06 19:30:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5163 to 4178. [2021-08-06 19:30:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.273401963131434) internal successors, (9496), 4177 states have internal predecessors, (9496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 9496 transitions. [2021-08-06 19:30:23,062 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 9496 transitions. Word has length 25 [2021-08-06 19:30:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:23,062 INFO L470 AbstractCegarLoop]: Abstraction has 4178 states and 9496 transitions. [2021-08-06 19:30:23,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:30:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 9496 transitions. [2021-08-06 19:30:23,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:23,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:23,068 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:23,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:23,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 19:30:23,269 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1682909028, now seen corresponding path program 24 times [2021-08-06 19:30:23,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:23,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440527373] [2021-08-06 19:30:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:23,269 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:23,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:23,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440527373] [2021-08-06 19:30:23,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440527373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:23,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125563524] [2021-08-06 19:30:23,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:30:23,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:23,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:23,345 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:23,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 19:30:24,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:30:24,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:24,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:30:24,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:24,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125563524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:24,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:24,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 19:30:24,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868438924] [2021-08-06 19:30:24,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:30:24,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:24,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:30:24,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:30:24,435 INFO L87 Difference]: Start difference. First operand 4178 states and 9496 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:30:25,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:25,787 INFO L93 Difference]: Finished difference Result 5118 states and 11027 transitions. [2021-08-06 19:30:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 19:30:25,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 25 [2021-08-06 19:30:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:25,794 INFO L225 Difference]: With dead ends: 5118 [2021-08-06 19:30:25,794 INFO L226 Difference]: Without dead ends: 5118 [2021-08-06 19:30:25,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 1117.7ms TimeCoverageRelationStatistics Valid=1133, Invalid=3027, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 19:30:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2021-08-06 19:30:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 4066. [2021-08-06 19:30:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4066 states, 4065 states have (on average 2.278966789667897) internal successors, (9264), 4065 states have internal predecessors, (9264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 9264 transitions. [2021-08-06 19:30:25,844 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 9264 transitions. Word has length 25 [2021-08-06 19:30:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:25,844 INFO L470 AbstractCegarLoop]: Abstraction has 4066 states and 9264 transitions. [2021-08-06 19:30:25,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:30:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 9264 transitions. [2021-08-06 19:30:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:25,850 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:25,850 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:25,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:26,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 19:30:26,050 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:26,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:26,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1634772956, now seen corresponding path program 9 times [2021-08-06 19:30:26,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:26,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941440819] [2021-08-06 19:30:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:26,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:26,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:26,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941440819] [2021-08-06 19:30:26,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941440819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:26,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615747885] [2021-08-06 19:30:26,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:30:26,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:26,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:26,108 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:26,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 19:30:26,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:30:26,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:26,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:30:26,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:27,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615747885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:27,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:27,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:30:27,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140462474] [2021-08-06 19:30:27,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:30:27,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:27,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:30:27,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:27,248 INFO L87 Difference]: Start difference. First operand 4066 states and 9264 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:27,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:27,630 INFO L93 Difference]: Finished difference Result 5785 states and 12816 transitions. [2021-08-06 19:30:27,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:30:27,630 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:30:27,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:27,637 INFO L225 Difference]: With dead ends: 5785 [2021-08-06 19:30:27,638 INFO L226 Difference]: Without dead ends: 5773 [2021-08-06 19:30:27,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:30:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5773 states. [2021-08-06 19:30:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5773 to 4154. [2021-08-06 19:30:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4154 states, 4153 states have (on average 2.27401878160366) internal successors, (9444), 4153 states have internal predecessors, (9444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4154 states to 4154 states and 9444 transitions. [2021-08-06 19:30:27,693 INFO L78 Accepts]: Start accepts. Automaton has 4154 states and 9444 transitions. Word has length 25 [2021-08-06 19:30:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:27,693 INFO L470 AbstractCegarLoop]: Abstraction has 4154 states and 9444 transitions. [2021-08-06 19:30:27,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:27,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4154 states and 9444 transitions. [2021-08-06 19:30:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:27,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:27,700 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:27,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:27,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:27,901 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:27,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1741637608, now seen corresponding path program 10 times [2021-08-06 19:30:27,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:27,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833921533] [2021-08-06 19:30:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:27,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:27,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:27,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833921533] [2021-08-06 19:30:27,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833921533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:27,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086127928] [2021-08-06 19:30:27,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:27,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:27,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:27,988 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:27,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 19:30:28,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:30:28,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:28,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:30:28,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:29,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086127928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:29,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:29,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-06 19:30:29,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845583424] [2021-08-06 19:30:29,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:30:29,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:29,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:30:29,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:30:29,161 INFO L87 Difference]: Start difference. First operand 4154 states and 9444 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 19:30:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:29,791 INFO L93 Difference]: Finished difference Result 6013 states and 13090 transitions. [2021-08-06 19:30:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 19:30:29,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 25 [2021-08-06 19:30:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:29,800 INFO L225 Difference]: With dead ends: 6013 [2021-08-06 19:30:29,800 INFO L226 Difference]: Without dead ends: 5997 [2021-08-06 19:30:29,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 19:30:29,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5997 states. [2021-08-06 19:30:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5997 to 4271. [2021-08-06 19:30:29,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4271 states, 4270 states have (on average 2.2740046838407495) internal successors, (9710), 4270 states have internal predecessors, (9710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:29,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4271 states to 4271 states and 9710 transitions. [2021-08-06 19:30:29,867 INFO L78 Accepts]: Start accepts. Automaton has 4271 states and 9710 transitions. Word has length 25 [2021-08-06 19:30:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:29,867 INFO L470 AbstractCegarLoop]: Abstraction has 4271 states and 9710 transitions. [2021-08-06 19:30:29,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 19:30:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4271 states and 9710 transitions. [2021-08-06 19:30:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:29,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:29,874 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:29,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:30,074 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,SelfDestructingSolverStorable41 [2021-08-06 19:30:30,075 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:30,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:30,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1066966884, now seen corresponding path program 11 times [2021-08-06 19:30:30,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:30,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175328108] [2021-08-06 19:30:30,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:30,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:30,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:30,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175328108] [2021-08-06 19:30:30,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175328108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:30,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580019618] [2021-08-06 19:30:30,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:30:30,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:30,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:30,124 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:30,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 19:30:30,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:30:30,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:30,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:30:30,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:31,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580019618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:31,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:31,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:30:31,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492381938] [2021-08-06 19:30:31,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:30:31,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:31,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:30:31,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:31,350 INFO L87 Difference]: Start difference. First operand 4271 states and 9710 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:32,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:32,536 INFO L93 Difference]: Finished difference Result 9393 states and 20335 transitions. [2021-08-06 19:30:32,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 19:30:32,537 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:30:32,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:32,549 INFO L225 Difference]: With dead ends: 9393 [2021-08-06 19:30:32,549 INFO L226 Difference]: Without dead ends: 9369 [2021-08-06 19:30:32,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 844.9ms TimeCoverageRelationStatistics Valid=755, Invalid=2785, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 19:30:32,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9369 states. [2021-08-06 19:30:32,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9369 to 5107. [2021-08-06 19:30:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5107 states, 5106 states have (on average 2.293184488836663) internal successors, (11709), 5106 states have internal predecessors, (11709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:32,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5107 states to 5107 states and 11709 transitions. [2021-08-06 19:30:32,631 INFO L78 Accepts]: Start accepts. Automaton has 5107 states and 11709 transitions. Word has length 25 [2021-08-06 19:30:32,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:32,631 INFO L470 AbstractCegarLoop]: Abstraction has 5107 states and 11709 transitions. [2021-08-06 19:30:32,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand 5107 states and 11709 transitions. [2021-08-06 19:30:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:32,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:32,637 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:32,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 19:30:32,838 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,SelfDestructingSolverStorable42 [2021-08-06 19:30:32,838 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:32,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:32,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1437253476, now seen corresponding path program 12 times [2021-08-06 19:30:32,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:32,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479708411] [2021-08-06 19:30:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:32,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:32,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:32,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479708411] [2021-08-06 19:30:32,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479708411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:32,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447265673] [2021-08-06 19:30:32,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:30:32,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:32,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:32,889 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:32,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 19:30:33,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:30:33,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:33,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:30:33,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:34,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447265673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:34,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:34,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:30:34,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721536218] [2021-08-06 19:30:34,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:30:34,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:34,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:30:34,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:34,102 INFO L87 Difference]: Start difference. First operand 5107 states and 11709 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:35,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:35,327 INFO L93 Difference]: Finished difference Result 11774 states and 25577 transitions. [2021-08-06 19:30:35,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 19:30:35,328 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:30:35,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:35,345 INFO L225 Difference]: With dead ends: 11774 [2021-08-06 19:30:35,346 INFO L226 Difference]: Without dead ends: 11774 [2021-08-06 19:30:35,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 862.9ms TimeCoverageRelationStatistics Valid=704, Invalid=2266, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 19:30:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11774 states. [2021-08-06 19:30:35,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11774 to 5909. [2021-08-06 19:30:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5909 states, 5908 states have (on average 2.29062288422478) internal successors, (13533), 5908 states have internal predecessors, (13533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5909 states to 5909 states and 13533 transitions. [2021-08-06 19:30:35,468 INFO L78 Accepts]: Start accepts. Automaton has 5909 states and 13533 transitions. Word has length 25 [2021-08-06 19:30:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:35,468 INFO L470 AbstractCegarLoop]: Abstraction has 5909 states and 13533 transitions. [2021-08-06 19:30:35,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 5909 states and 13533 transitions. [2021-08-06 19:30:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:35,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:35,475 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:35,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:35,676 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,SelfDestructingSolverStorable43 [2021-08-06 19:30:35,676 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:35,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:35,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1947040360, now seen corresponding path program 25 times [2021-08-06 19:30:35,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:35,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702671033] [2021-08-06 19:30:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:35,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:35,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:35,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702671033] [2021-08-06 19:30:35,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702671033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:35,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261186017] [2021-08-06 19:30:35,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:35,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:35,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:35,738 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:35,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 19:30:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:36,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:30:36,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:30:36,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261186017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:36,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:36,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 19:30:36,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125824890] [2021-08-06 19:30:36,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:30:36,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:36,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:30:36,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:30:36,911 INFO L87 Difference]: Start difference. First operand 5909 states and 13533 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-08-06 19:30:37,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:37,040 INFO L93 Difference]: Finished difference Result 9608 states and 21241 transitions. [2021-08-06 19:30:37,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 19:30:37,040 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 25 [2021-08-06 19:30:37,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:37,054 INFO L225 Difference]: With dead ends: 9608 [2021-08-06 19:30:37,054 INFO L226 Difference]: Without dead ends: 9608 [2021-08-06 19:30:37,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-08-06 19:30:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9608 states. [2021-08-06 19:30:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9608 to 6764. [2021-08-06 19:30:37,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6764 states, 6763 states have (on average 2.2927694809995565) internal successors, (15506), 6763 states have internal predecessors, (15506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6764 states to 6764 states and 15506 transitions. [2021-08-06 19:30:37,169 INFO L78 Accepts]: Start accepts. Automaton has 6764 states and 15506 transitions. Word has length 25 [2021-08-06 19:30:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:37,169 INFO L470 AbstractCegarLoop]: Abstraction has 6764 states and 15506 transitions. [2021-08-06 19:30:37,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-08-06 19:30:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 6764 states and 15506 transitions. [2021-08-06 19:30:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:37,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:37,178 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:37,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 19:30:37,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:37,393 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:37,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:37,393 INFO L82 PathProgramCache]: Analyzing trace with hash -2018936736, now seen corresponding path program 13 times [2021-08-06 19:30:37,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:37,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590998587] [2021-08-06 19:30:37,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:37,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:37,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:37,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:37,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590998587] [2021-08-06 19:30:37,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590998587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:37,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899805996] [2021-08-06 19:30:37,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:37,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:37,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:37,442 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:37,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 19:30:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:38,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:30:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:38,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899805996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:38,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:38,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:30:38,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883177186] [2021-08-06 19:30:38,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:30:38,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:38,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:30:38,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:38,726 INFO L87 Difference]: Start difference. First operand 6764 states and 15506 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:40,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:40,373 INFO L93 Difference]: Finished difference Result 20583 states and 45324 transitions. [2021-08-06 19:30:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 19:30:40,374 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:30:40,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:40,409 INFO L225 Difference]: With dead ends: 20583 [2021-08-06 19:30:40,410 INFO L226 Difference]: Without dead ends: 20581 [2021-08-06 19:30:40,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1242.7ms TimeCoverageRelationStatistics Valid=1337, Invalid=4213, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 19:30:40,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20581 states. [2021-08-06 19:30:40,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20581 to 9100. [2021-08-06 19:30:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9100 states, 9099 states have (on average 2.3526761182547533) internal successors, (21407), 9099 states have internal predecessors, (21407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:40,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9100 states to 9100 states and 21407 transitions. [2021-08-06 19:30:40,646 INFO L78 Accepts]: Start accepts. Automaton has 9100 states and 21407 transitions. Word has length 25 [2021-08-06 19:30:40,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:40,646 INFO L470 AbstractCegarLoop]: Abstraction has 9100 states and 21407 transitions. [2021-08-06 19:30:40,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 9100 states and 21407 transitions. [2021-08-06 19:30:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:40,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:40,658 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:40,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 19:30:40,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:40,858 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:40,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:40,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1639159904, now seen corresponding path program 14 times [2021-08-06 19:30:40,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:40,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822179929] [2021-08-06 19:30:40,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:40,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:40,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:40,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822179929] [2021-08-06 19:30:40,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822179929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:40,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544033730] [2021-08-06 19:30:40,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:30:40,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:40,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:40,911 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:40,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 19:30:41,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:30:41,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:41,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:30:41,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:42,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544033730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:42,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:42,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:30:42,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007836160] [2021-08-06 19:30:42,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:30:42,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:30:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:42,214 INFO L87 Difference]: Start difference. First operand 9100 states and 21407 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:43,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:43,681 INFO L93 Difference]: Finished difference Result 20484 states and 45626 transitions. [2021-08-06 19:30:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-06 19:30:43,682 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:30:43,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:43,717 INFO L225 Difference]: With dead ends: 20484 [2021-08-06 19:30:43,717 INFO L226 Difference]: Without dead ends: 20484 [2021-08-06 19:30:43,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 1088.4ms TimeCoverageRelationStatistics Valid=1157, Invalid=3265, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 19:30:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20484 states. [2021-08-06 19:30:43,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20484 to 9655. [2021-08-06 19:30:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9655 states, 9654 states have (on average 2.3644085353221462) internal successors, (22826), 9654 states have internal predecessors, (22826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:43,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9655 states to 9655 states and 22826 transitions. [2021-08-06 19:30:43,943 INFO L78 Accepts]: Start accepts. Automaton has 9655 states and 22826 transitions. Word has length 25 [2021-08-06 19:30:43,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:43,943 INFO L470 AbstractCegarLoop]: Abstraction has 9655 states and 22826 transitions. [2021-08-06 19:30:43,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 9655 states and 22826 transitions. [2021-08-06 19:30:43,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:43,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:43,955 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:43,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 19:30:44,156 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,SelfDestructingSolverStorable46 [2021-08-06 19:30:44,156 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:44,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:44,156 INFO L82 PathProgramCache]: Analyzing trace with hash -845380828, now seen corresponding path program 15 times [2021-08-06 19:30:44,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:44,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278856107] [2021-08-06 19:30:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:44,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:44,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:44,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278856107] [2021-08-06 19:30:44,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278856107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:44,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905924804] [2021-08-06 19:30:44,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:30:44,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:44,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:44,241 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:44,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 19:30:45,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:30:45,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:45,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:30:45,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:45,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905924804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:45,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:45,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:30:45,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531379250] [2021-08-06 19:30:45,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:30:45,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:45,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:30:45,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:45,558 INFO L87 Difference]: Start difference. First operand 9655 states and 22826 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:46,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:46,941 INFO L93 Difference]: Finished difference Result 21725 states and 48466 transitions. [2021-08-06 19:30:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 19:30:46,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:30:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:46,977 INFO L225 Difference]: With dead ends: 21725 [2021-08-06 19:30:46,978 INFO L226 Difference]: Without dead ends: 21725 [2021-08-06 19:30:46,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 1075.0ms TimeCoverageRelationStatistics Valid=1289, Invalid=3823, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 19:30:46,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21725 states. [2021-08-06 19:30:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21725 to 9952. [2021-08-06 19:30:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9952 states, 9951 states have (on average 2.3776504873882023) internal successors, (23660), 9951 states have internal predecessors, (23660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9952 states to 9952 states and 23660 transitions. [2021-08-06 19:30:47,289 INFO L78 Accepts]: Start accepts. Automaton has 9952 states and 23660 transitions. Word has length 25 [2021-08-06 19:30:47,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:47,289 INFO L470 AbstractCegarLoop]: Abstraction has 9952 states and 23660 transitions. [2021-08-06 19:30:47,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 9952 states and 23660 transitions. [2021-08-06 19:30:47,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:47,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:47,303 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:47,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:47,512 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,SelfDestructingSolverStorable47 [2021-08-06 19:30:47,513 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1926154464, now seen corresponding path program 16 times [2021-08-06 19:30:47,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:47,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308321779] [2021-08-06 19:30:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:47,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:47,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:47,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308321779] [2021-08-06 19:30:47,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308321779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:47,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569925010] [2021-08-06 19:30:47,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:30:47,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:47,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:47,571 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:47,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 19:30:48,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:30:48,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:48,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:30:48,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:48,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569925010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:48,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:48,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:30:48,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204845199] [2021-08-06 19:30:48,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:30:48,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:48,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:30:48,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:48,927 INFO L87 Difference]: Start difference. First operand 9952 states and 23660 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:49,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:49,640 INFO L93 Difference]: Finished difference Result 24907 states and 56025 transitions. [2021-08-06 19:30:49,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 19:30:49,641 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:30:49,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:49,696 INFO L225 Difference]: With dead ends: 24907 [2021-08-06 19:30:49,696 INFO L226 Difference]: Without dead ends: 24905 [2021-08-06 19:30:49,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:30:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24905 states. [2021-08-06 19:30:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24905 to 13879. [2021-08-06 19:30:50,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13879 states, 13878 states have (on average 2.3992650237786424) internal successors, (33297), 13878 states have internal predecessors, (33297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13879 states to 13879 states and 33297 transitions. [2021-08-06 19:30:50,048 INFO L78 Accepts]: Start accepts. Automaton has 13879 states and 33297 transitions. Word has length 25 [2021-08-06 19:30:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:50,049 INFO L470 AbstractCegarLoop]: Abstraction has 13879 states and 33297 transitions. [2021-08-06 19:30:50,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 13879 states and 33297 transitions. [2021-08-06 19:30:50,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:50,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:50,069 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:50,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:50,284 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,SelfDestructingSolverStorable48 [2021-08-06 19:30:50,285 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:50,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1535778280, now seen corresponding path program 17 times [2021-08-06 19:30:50,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:50,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025513587] [2021-08-06 19:30:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:50,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:50,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:50,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025513587] [2021-08-06 19:30:50,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025513587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:50,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108394212] [2021-08-06 19:30:50,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:30:50,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:50,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:50,377 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:50,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 19:30:51,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:30:51,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:51,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:30:51,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:51,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108394212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:51,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:51,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:30:51,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395653212] [2021-08-06 19:30:51,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:30:51,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:51,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:30:51,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:30:51,776 INFO L87 Difference]: Start difference. First operand 13879 states and 33297 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:53,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:53,715 INFO L93 Difference]: Finished difference Result 27852 states and 64441 transitions. [2021-08-06 19:30:53,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-06 19:30:53,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:30:53,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:53,772 INFO L225 Difference]: With dead ends: 27852 [2021-08-06 19:30:53,772 INFO L226 Difference]: Without dead ends: 27846 [2021-08-06 19:30:53,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 1444.7ms TimeCoverageRelationStatistics Valid=1503, Invalid=4817, Unknown=0, NotChecked=0, Total=6320 [2021-08-06 19:30:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27846 states. [2021-08-06 19:30:54,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27846 to 15832. [2021-08-06 19:30:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15832 states, 15831 states have (on average 2.4242309392963173) internal successors, (38378), 15831 states have internal predecessors, (38378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15832 states to 15832 states and 38378 transitions. [2021-08-06 19:30:54,134 INFO L78 Accepts]: Start accepts. Automaton has 15832 states and 38378 transitions. Word has length 25 [2021-08-06 19:30:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:54,135 INFO L470 AbstractCegarLoop]: Abstraction has 15832 states and 38378 transitions. [2021-08-06 19:30:54,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:30:54,135 INFO L276 IsEmpty]: Start isEmpty. Operand 15832 states and 38378 transitions. [2021-08-06 19:30:54,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:54,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:54,158 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:54,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:54,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:54,358 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:54,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:54,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1165256808, now seen corresponding path program 18 times [2021-08-06 19:30:54,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:54,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240079475] [2021-08-06 19:30:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:54,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:54,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:54,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240079475] [2021-08-06 19:30:54,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240079475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:54,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236030147] [2021-08-06 19:30:54,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:30:54,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:54,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:54,444 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:54,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 19:30:55,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:30:55,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:30:55,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:30:55,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:55,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236030147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:55,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:55,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-06 19:30:55,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501282840] [2021-08-06 19:30:55,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:30:55,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:55,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:30:55,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:30:55,845 INFO L87 Difference]: Start difference. First operand 15832 states and 38378 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 19:30:56,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:56,395 INFO L93 Difference]: Finished difference Result 18160 states and 43151 transitions. [2021-08-06 19:30:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 19:30:56,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 25 [2021-08-06 19:30:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:56,442 INFO L225 Difference]: With dead ends: 18160 [2021-08-06 19:30:56,442 INFO L226 Difference]: Without dead ends: 18154 [2021-08-06 19:30:56,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-08-06 19:30:56,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18154 states. [2021-08-06 19:30:56,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18154 to 15824. [2021-08-06 19:30:56,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15824 states, 15823 states have (on average 2.424192630980219) internal successors, (38358), 15823 states have internal predecessors, (38358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15824 states to 15824 states and 38358 transitions. [2021-08-06 19:30:56,699 INFO L78 Accepts]: Start accepts. Automaton has 15824 states and 38358 transitions. Word has length 25 [2021-08-06 19:30:56,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:56,699 INFO L470 AbstractCegarLoop]: Abstraction has 15824 states and 38358 transitions. [2021-08-06 19:30:56,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 19:30:56,700 INFO L276 IsEmpty]: Start isEmpty. Operand 15824 states and 38358 transitions. [2021-08-06 19:30:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:56,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:56,722 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:56,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 19:30:56,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:56,936 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:30:56,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:30:56,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1005220952, now seen corresponding path program 19 times [2021-08-06 19:30:56,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:30:56,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46732691] [2021-08-06 19:30:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:30:56,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:30:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:57,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:30:57,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46732691] [2021-08-06 19:30:57,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46732691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:57,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937080534] [2021-08-06 19:30:57,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:30:57,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:30:57,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:30:57,004 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:30:57,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 19:30:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:30:58,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:30:58,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:30:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:30:58,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937080534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:30:58,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:30:58,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-06 19:30:58,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22663344] [2021-08-06 19:30:58,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:30:58,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:30:58,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:30:58,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:30:58,503 INFO L87 Difference]: Start difference. First operand 15824 states and 38358 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 19:30:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:30:59,616 INFO L93 Difference]: Finished difference Result 21066 states and 49234 transitions. [2021-08-06 19:30:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 19:30:59,616 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 25 [2021-08-06 19:30:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:30:59,659 INFO L225 Difference]: With dead ends: 21066 [2021-08-06 19:30:59,659 INFO L226 Difference]: Without dead ends: 21050 [2021-08-06 19:30:59,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 831.7ms TimeCoverageRelationStatistics Valid=572, Invalid=2398, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 19:30:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21050 states. [2021-08-06 19:30:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21050 to 15951. [2021-08-06 19:30:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15951 states, 15950 states have (on average 2.422194357366771) internal successors, (38634), 15950 states have internal predecessors, (38634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:30:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15951 states to 15951 states and 38634 transitions. [2021-08-06 19:30:59,936 INFO L78 Accepts]: Start accepts. Automaton has 15951 states and 38634 transitions. Word has length 25 [2021-08-06 19:30:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:30:59,936 INFO L470 AbstractCegarLoop]: Abstraction has 15951 states and 38634 transitions. [2021-08-06 19:30:59,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 19:30:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 15951 states and 38634 transitions. [2021-08-06 19:30:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:30:59,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:30:59,956 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:30:59,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:00,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:00,157 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:00,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:00,157 INFO L82 PathProgramCache]: Analyzing trace with hash 458524520, now seen corresponding path program 3 times [2021-08-06 19:31:00,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:00,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778468741] [2021-08-06 19:31:00,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:00,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:00,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:00,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778468741] [2021-08-06 19:31:00,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778468741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:00,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125236242] [2021-08-06 19:31:00,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:00,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:00,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:00,207 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:00,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 19:31:01,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:31:01,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:01,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:31:01,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:01,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125236242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:01,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:01,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:31:01,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677673110] [2021-08-06 19:31:01,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:01,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:01,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:01,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:01,530 INFO L87 Difference]: Start difference. First operand 15951 states and 38634 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:31:01,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:01,754 INFO L93 Difference]: Finished difference Result 20298 states and 47882 transitions. [2021-08-06 19:31:01,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:31:01,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:31:01,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:01,794 INFO L225 Difference]: With dead ends: 20298 [2021-08-06 19:31:01,795 INFO L226 Difference]: Without dead ends: 20292 [2021-08-06 19:31:01,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-08-06 19:31:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20292 states. [2021-08-06 19:31:02,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20292 to 16803. [2021-08-06 19:31:02,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16803 states, 16802 states have (on average 2.4195929056064753) internal successors, (40654), 16802 states have internal predecessors, (40654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16803 states to 16803 states and 40654 transitions. [2021-08-06 19:31:02,068 INFO L78 Accepts]: Start accepts. Automaton has 16803 states and 40654 transitions. Word has length 25 [2021-08-06 19:31:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:02,068 INFO L470 AbstractCegarLoop]: Abstraction has 16803 states and 40654 transitions. [2021-08-06 19:31:02,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:31:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 16803 states and 40654 transitions. [2021-08-06 19:31:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:02,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:02,091 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:02,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 19:31:02,291 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,SelfDestructingSolverStorable52 [2021-08-06 19:31:02,291 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:02,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:02,292 INFO L82 PathProgramCache]: Analyzing trace with hash 572338212, now seen corresponding path program 20 times [2021-08-06 19:31:02,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:02,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019697828] [2021-08-06 19:31:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:02,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:02,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:02,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019697828] [2021-08-06 19:31:02,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019697828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:02,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662367333] [2021-08-06 19:31:02,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:02,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:02,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:02,346 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:02,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 19:31:03,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:03,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:03,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:31:03,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:03,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662367333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:03,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:03,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:31:03,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105199934] [2021-08-06 19:31:03,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:03,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:03,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:03,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:03,809 INFO L87 Difference]: Start difference. First operand 16803 states and 40654 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:31:04,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:04,702 INFO L93 Difference]: Finished difference Result 28184 states and 65189 transitions. [2021-08-06 19:31:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 19:31:04,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:31:04,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:04,834 INFO L225 Difference]: With dead ends: 28184 [2021-08-06 19:31:04,834 INFO L226 Difference]: Without dead ends: 28184 [2021-08-06 19:31:04,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=481, Invalid=1411, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 19:31:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28184 states. [2021-08-06 19:31:05,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28184 to 19645. [2021-08-06 19:31:05,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19645 states, 19644 states have (on average 2.427916921197312) internal successors, (47694), 19644 states have internal predecessors, (47694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19645 states to 19645 states and 47694 transitions. [2021-08-06 19:31:05,166 INFO L78 Accepts]: Start accepts. Automaton has 19645 states and 47694 transitions. Word has length 25 [2021-08-06 19:31:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:05,166 INFO L470 AbstractCegarLoop]: Abstraction has 19645 states and 47694 transitions. [2021-08-06 19:31:05,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:31:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 19645 states and 47694 transitions. [2021-08-06 19:31:05,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:05,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:05,191 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:05,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 19:31:05,391 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,SelfDestructingSolverStorable53 [2021-08-06 19:31:05,392 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:05,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1091002276, now seen corresponding path program 21 times [2021-08-06 19:31:05,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:05,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835628655] [2021-08-06 19:31:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:05,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:05,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:05,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835628655] [2021-08-06 19:31:05,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835628655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:05,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491393115] [2021-08-06 19:31:05,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:05,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:05,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:05,445 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:05,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 19:31:06,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:31:06,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:06,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:31:06,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:07,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491393115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:07,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:07,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:31:07,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98948099] [2021-08-06 19:31:07,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:31:07,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:07,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:31:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:07,061 INFO L87 Difference]: Start difference. First operand 19645 states and 47694 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:07,699 INFO L93 Difference]: Finished difference Result 20679 states and 49502 transitions. [2021-08-06 19:31:07,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 19:31:07,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:31:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:07,735 INFO L225 Difference]: With dead ends: 20679 [2021-08-06 19:31:07,736 INFO L226 Difference]: Without dead ends: 20661 [2021-08-06 19:31:07,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 484.5ms TimeCoverageRelationStatistics Valid=362, Invalid=1360, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 19:31:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20661 states. [2021-08-06 19:31:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20661 to 19696. [2021-08-06 19:31:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19696 states, 19695 states have (on average 2.426148768723026) internal successors, (47783), 19695 states have internal predecessors, (47783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19696 states to 19696 states and 47783 transitions. [2021-08-06 19:31:08,053 INFO L78 Accepts]: Start accepts. Automaton has 19696 states and 47783 transitions. Word has length 25 [2021-08-06 19:31:08,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:08,053 INFO L470 AbstractCegarLoop]: Abstraction has 19696 states and 47783 transitions. [2021-08-06 19:31:08,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:08,053 INFO L276 IsEmpty]: Start isEmpty. Operand 19696 states and 47783 transitions. [2021-08-06 19:31:08,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:08,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:08,079 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:08,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 19:31:08,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:08,280 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:08,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:08,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2011498588, now seen corresponding path program 22 times [2021-08-06 19:31:08,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:08,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644938668] [2021-08-06 19:31:08,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:08,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:08,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:08,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:08,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644938668] [2021-08-06 19:31:08,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644938668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:08,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492470358] [2021-08-06 19:31:08,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:08,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:08,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:08,371 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:08,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 19:31:09,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:09,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:09,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:31:09,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:09,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492470358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:09,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:09,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:31:09,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040360600] [2021-08-06 19:31:09,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:31:09,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:09,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:31:09,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:09,856 INFO L87 Difference]: Start difference. First operand 19696 states and 47783 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:10,639 INFO L93 Difference]: Finished difference Result 20601 states and 49294 transitions. [2021-08-06 19:31:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 19:31:10,640 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:31:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:10,673 INFO L225 Difference]: With dead ends: 20601 [2021-08-06 19:31:10,673 INFO L226 Difference]: Without dead ends: 20593 [2021-08-06 19:31:10,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 572.6ms TimeCoverageRelationStatistics Valid=531, Invalid=1821, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 19:31:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20593 states. [2021-08-06 19:31:10,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20593 to 19708. [2021-08-06 19:31:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19708 states, 19707 states have (on average 2.4253311006241436) internal successors, (47796), 19707 states have internal predecessors, (47796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19708 states to 19708 states and 47796 transitions. [2021-08-06 19:31:11,035 INFO L78 Accepts]: Start accepts. Automaton has 19708 states and 47796 transitions. Word has length 25 [2021-08-06 19:31:11,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:11,036 INFO L470 AbstractCegarLoop]: Abstraction has 19708 states and 47796 transitions. [2021-08-06 19:31:11,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:11,036 INFO L276 IsEmpty]: Start isEmpty. Operand 19708 states and 47796 transitions. [2021-08-06 19:31:11,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:11,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:11,064 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:11,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:11,264 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,SelfDestructingSolverStorable55 [2021-08-06 19:31:11,264 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:11,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:11,265 INFO L82 PathProgramCache]: Analyzing trace with hash 791973796, now seen corresponding path program 23 times [2021-08-06 19:31:11,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:11,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011767259] [2021-08-06 19:31:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:11,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:11,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:11,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011767259] [2021-08-06 19:31:11,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011767259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:11,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965469951] [2021-08-06 19:31:11,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:11,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:11,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:11,324 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:11,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 19:31:12,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:31:12,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:12,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:31:12,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:12,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965469951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:12,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:12,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:31:12,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305072613] [2021-08-06 19:31:12,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:31:12,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:12,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:31:12,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:12,846 INFO L87 Difference]: Start difference. First operand 19708 states and 47796 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:14,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:14,056 INFO L93 Difference]: Finished difference Result 20677 states and 49446 transitions. [2021-08-06 19:31:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-06 19:31:14,056 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:31:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:14,090 INFO L225 Difference]: With dead ends: 20677 [2021-08-06 19:31:14,090 INFO L226 Difference]: Without dead ends: 20677 [2021-08-06 19:31:14,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 922.1ms TimeCoverageRelationStatistics Valid=1079, Invalid=3343, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 19:31:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20677 states. [2021-08-06 19:31:14,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20677 to 19508. [2021-08-06 19:31:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19508 states, 19507 states have (on average 2.428205259650382) internal successors, (47367), 19507 states have internal predecessors, (47367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19508 states to 19508 states and 47367 transitions. [2021-08-06 19:31:14,402 INFO L78 Accepts]: Start accepts. Automaton has 19508 states and 47367 transitions. Word has length 25 [2021-08-06 19:31:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:14,403 INFO L470 AbstractCegarLoop]: Abstraction has 19508 states and 47367 transitions. [2021-08-06 19:31:14,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 19508 states and 47367 transitions. [2021-08-06 19:31:14,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:14,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:14,427 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:14,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:14,627 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,SelfDestructingSolverStorable56 [2021-08-06 19:31:14,627 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:14,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:14,628 INFO L82 PathProgramCache]: Analyzing trace with hash 663927272, now seen corresponding path program 24 times [2021-08-06 19:31:14,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:14,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423378574] [2021-08-06 19:31:14,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:14,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:14,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:14,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423378574] [2021-08-06 19:31:14,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423378574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:14,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851637231] [2021-08-06 19:31:14,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:14,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:14,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:14,736 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:14,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 19:31:15,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:31:15,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:15,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:31:15,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:16,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851637231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:16,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:16,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:31:16,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74246821] [2021-08-06 19:31:16,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:16,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:16,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:16,258 INFO L87 Difference]: Start difference. First operand 19508 states and 47367 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:31:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:17,076 INFO L93 Difference]: Finished difference Result 34238 states and 79623 transitions. [2021-08-06 19:31:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 19:31:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:31:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:17,131 INFO L225 Difference]: With dead ends: 34238 [2021-08-06 19:31:17,131 INFO L226 Difference]: Without dead ends: 34238 [2021-08-06 19:31:17,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 481.2ms TimeCoverageRelationStatistics Valid=394, Invalid=1088, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 19:31:17,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34238 states. [2021-08-06 19:31:17,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34238 to 21987. [2021-08-06 19:31:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21987 states, 21986 states have (on average 2.423815155098699) internal successors, (53290), 21986 states have internal predecessors, (53290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:17,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21987 states to 21987 states and 53290 transitions. [2021-08-06 19:31:17,546 INFO L78 Accepts]: Start accepts. Automaton has 21987 states and 53290 transitions. Word has length 25 [2021-08-06 19:31:17,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:17,546 INFO L470 AbstractCegarLoop]: Abstraction has 21987 states and 53290 transitions. [2021-08-06 19:31:17,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:31:17,547 INFO L276 IsEmpty]: Start isEmpty. Operand 21987 states and 53290 transitions. [2021-08-06 19:31:17,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:17,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:17,578 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:17,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-06 19:31:17,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:17,778 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:17,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:17,779 INFO L82 PathProgramCache]: Analyzing trace with hash 6646120, now seen corresponding path program 25 times [2021-08-06 19:31:17,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:17,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517044468] [2021-08-06 19:31:17,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:17,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:17,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:17,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517044468] [2021-08-06 19:31:17,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517044468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:17,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339708557] [2021-08-06 19:31:17,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:17,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:17,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:17,837 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:17,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 19:31:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:19,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:31:19,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:19,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339708557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:19,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:19,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:31:19,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116994585] [2021-08-06 19:31:19,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:31:19,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:19,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:31:19,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:19,424 INFO L87 Difference]: Start difference. First operand 21987 states and 53290 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:20,456 INFO L93 Difference]: Finished difference Result 22941 states and 55132 transitions. [2021-08-06 19:31:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 19:31:20,457 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:31:20,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:20,496 INFO L225 Difference]: With dead ends: 22941 [2021-08-06 19:31:20,496 INFO L226 Difference]: Without dead ends: 22941 [2021-08-06 19:31:20,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 757.7ms TimeCoverageRelationStatistics Valid=769, Invalid=2311, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 19:31:20,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22941 states. [2021-08-06 19:31:20,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22941 to 22179. [2021-08-06 19:31:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22179 states, 22178 states have (on average 2.4218144106772477) internal successors, (53711), 22178 states have internal predecessors, (53711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22179 states to 22179 states and 53711 transitions. [2021-08-06 19:31:20,941 INFO L78 Accepts]: Start accepts. Automaton has 22179 states and 53711 transitions. Word has length 25 [2021-08-06 19:31:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:20,941 INFO L470 AbstractCegarLoop]: Abstraction has 22179 states and 53711 transitions. [2021-08-06 19:31:20,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:20,941 INFO L276 IsEmpty]: Start isEmpty. Operand 22179 states and 53711 transitions. [2021-08-06 19:31:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:20,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:20,970 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:20,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 19:31:21,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:21,171 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:21,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1579030888, now seen corresponding path program 26 times [2021-08-06 19:31:21,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:21,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681739219] [2021-08-06 19:31:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:21,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:21,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:21,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681739219] [2021-08-06 19:31:21,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681739219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:21,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774451357] [2021-08-06 19:31:21,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:21,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:21,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:21,235 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:21,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 19:31:22,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:22,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:22,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:31:22,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:22,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774451357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:22,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:22,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:31:22,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178458040] [2021-08-06 19:31:22,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:31:22,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:22,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:31:22,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:22,839 INFO L87 Difference]: Start difference. First operand 22179 states and 53711 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:23,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:23,505 INFO L93 Difference]: Finished difference Result 23087 states and 55351 transitions. [2021-08-06 19:31:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 19:31:23,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:31:23,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:23,544 INFO L225 Difference]: With dead ends: 23087 [2021-08-06 19:31:23,544 INFO L226 Difference]: Without dead ends: 23081 [2021-08-06 19:31:23,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 417.0ms TimeCoverageRelationStatistics Valid=336, Invalid=1224, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 19:31:23,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23081 states. [2021-08-06 19:31:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23081 to 22217. [2021-08-06 19:31:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 2.4213179690313287) internal successors, (53792), 22216 states have internal predecessors, (53792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 53792 transitions. [2021-08-06 19:31:23,926 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 53792 transitions. Word has length 25 [2021-08-06 19:31:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:23,926 INFO L470 AbstractCegarLoop]: Abstraction has 22217 states and 53792 transitions. [2021-08-06 19:31:23,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 53792 transitions. [2021-08-06 19:31:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:23,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:23,958 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:23,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:24,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 19:31:24,158 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:24,159 INFO L82 PathProgramCache]: Analyzing trace with hash 87535976, now seen corresponding path program 27 times [2021-08-06 19:31:24,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:24,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079528208] [2021-08-06 19:31:24,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:24,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:24,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:24,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079528208] [2021-08-06 19:31:24,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079528208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:24,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626602061] [2021-08-06 19:31:24,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:24,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:24,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:24,215 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:24,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 19:31:25,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 19:31:25,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:25,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:31:25,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:25,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626602061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:25,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:25,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:31:25,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808335910] [2021-08-06 19:31:25,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:31:25,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:25,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:31:25,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:25,841 INFO L87 Difference]: Start difference. First operand 22217 states and 53792 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:26,921 INFO L93 Difference]: Finished difference Result 23071 states and 55327 transitions. [2021-08-06 19:31:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 19:31:26,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:31:26,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:26,960 INFO L225 Difference]: With dead ends: 23071 [2021-08-06 19:31:26,960 INFO L226 Difference]: Without dead ends: 23071 [2021-08-06 19:31:26,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 787.4ms TimeCoverageRelationStatistics Valid=804, Invalid=2502, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 19:31:26,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23071 states. [2021-08-06 19:31:27,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23071 to 22189. [2021-08-06 19:31:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22189 states, 22188 states have (on average 2.4209031909140077) internal successors, (53715), 22188 states have internal predecessors, (53715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22189 states to 22189 states and 53715 transitions. [2021-08-06 19:31:27,407 INFO L78 Accepts]: Start accepts. Automaton has 22189 states and 53715 transitions. Word has length 25 [2021-08-06 19:31:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:27,407 INFO L470 AbstractCegarLoop]: Abstraction has 22189 states and 53715 transitions. [2021-08-06 19:31:27,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:27,408 INFO L276 IsEmpty]: Start isEmpty. Operand 22189 states and 53715 transitions. [2021-08-06 19:31:27,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:27,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:27,437 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:27,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 19:31:27,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:27,637 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:27,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:27,638 INFO L82 PathProgramCache]: Analyzing trace with hash -105507932, now seen corresponding path program 28 times [2021-08-06 19:31:27,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:27,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162324674] [2021-08-06 19:31:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:27,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:27,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:27,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162324674] [2021-08-06 19:31:27,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162324674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:27,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085893815] [2021-08-06 19:31:27,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:27,687 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:27,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:27,688 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:27,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 19:31:28,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:28,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:28,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:31:28,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:29,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085893815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:29,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:29,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:31:29,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580145154] [2021-08-06 19:31:29,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:29,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:29,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:29,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:29,290 INFO L87 Difference]: Start difference. First operand 22189 states and 53715 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:31:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:31,185 INFO L93 Difference]: Finished difference Result 42849 states and 100203 transitions. [2021-08-06 19:31:31,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-06 19:31:31,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:31:31,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:31,290 INFO L225 Difference]: With dead ends: 42849 [2021-08-06 19:31:31,290 INFO L226 Difference]: Without dead ends: 42845 [2021-08-06 19:31:31,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 1331.5ms TimeCoverageRelationStatistics Valid=1391, Invalid=4309, Unknown=0, NotChecked=0, Total=5700 [2021-08-06 19:31:31,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42845 states. [2021-08-06 19:31:31,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42845 to 22830. [2021-08-06 19:31:31,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22830 states, 22829 states have (on average 2.4309869026238555) internal successors, (55497), 22829 states have internal predecessors, (55497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22830 states to 22830 states and 55497 transitions. [2021-08-06 19:31:32,025 INFO L78 Accepts]: Start accepts. Automaton has 22830 states and 55497 transitions. Word has length 25 [2021-08-06 19:31:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:32,025 INFO L470 AbstractCegarLoop]: Abstraction has 22830 states and 55497 transitions. [2021-08-06 19:31:32,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:31:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 22830 states and 55497 transitions. [2021-08-06 19:31:32,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:32,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:32,053 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:32,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:32,260 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,SelfDestructingSolverStorable61 [2021-08-06 19:31:32,261 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:32,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:32,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1153352344, now seen corresponding path program 29 times [2021-08-06 19:31:32,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:32,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952014294] [2021-08-06 19:31:32,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:32,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:32,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:32,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952014294] [2021-08-06 19:31:32,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952014294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:32,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136659252] [2021-08-06 19:31:32,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:32,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:32,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:32,361 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:32,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 19:31:33,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:31:33,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:33,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:31:33,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:34,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136659252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:34,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:34,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:31:34,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610289429] [2021-08-06 19:31:34,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:34,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:34,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:34,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:34,076 INFO L87 Difference]: Start difference. First operand 22830 states and 55497 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:31:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:35,864 INFO L93 Difference]: Finished difference Result 43650 states and 101324 transitions. [2021-08-06 19:31:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 19:31:35,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:31:35,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:35,963 INFO L225 Difference]: With dead ends: 43650 [2021-08-06 19:31:35,963 INFO L226 Difference]: Without dead ends: 43646 [2021-08-06 19:31:35,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2171 ImplicationChecksByTransitivity, 1280.6ms TimeCoverageRelationStatistics Valid=1519, Invalid=4643, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 19:31:36,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43646 states. [2021-08-06 19:31:36,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43646 to 25502. [2021-08-06 19:31:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25502 states, 25501 states have (on average 2.4321007019332574) internal successors, (62021), 25501 states have internal predecessors, (62021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25502 states to 25502 states and 62021 transitions. [2021-08-06 19:31:36,607 INFO L78 Accepts]: Start accepts. Automaton has 25502 states and 62021 transitions. Word has length 25 [2021-08-06 19:31:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:36,608 INFO L470 AbstractCegarLoop]: Abstraction has 25502 states and 62021 transitions. [2021-08-06 19:31:36,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:31:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 25502 states and 62021 transitions. [2021-08-06 19:31:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:36,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:36,642 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:36,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 19:31:36,844 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,SelfDestructingSolverStorable62 [2021-08-06 19:31:36,845 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:36,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:36,845 INFO L82 PathProgramCache]: Analyzing trace with hash -290033952, now seen corresponding path program 30 times [2021-08-06 19:31:36,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:36,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569697822] [2021-08-06 19:31:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:36,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:36,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:36,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:36,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569697822] [2021-08-06 19:31:36,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569697822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:36,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841510981] [2021-08-06 19:31:36,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:31:36,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:36,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:36,913 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:36,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 19:31:38,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:31:38,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:38,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:31:38,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:38,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841510981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:38,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:38,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 19:31:38,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571271892] [2021-08-06 19:31:38,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:31:38,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:38,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:31:38,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:31:38,672 INFO L87 Difference]: Start difference. First operand 25502 states and 62021 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:31:39,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:39,042 INFO L93 Difference]: Finished difference Result 25872 states and 62668 transitions. [2021-08-06 19:31:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 19:31:39,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 25 [2021-08-06 19:31:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:39,090 INFO L225 Difference]: With dead ends: 25872 [2021-08-06 19:31:39,090 INFO L226 Difference]: Without dead ends: 25862 [2021-08-06 19:31:39,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-08-06 19:31:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25862 states. [2021-08-06 19:31:39,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25862 to 25566. [2021-08-06 19:31:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25566 states, 25565 states have (on average 2.4312145511441425) internal successors, (62154), 25565 states have internal predecessors, (62154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25566 states to 25566 states and 62154 transitions. [2021-08-06 19:31:39,551 INFO L78 Accepts]: Start accepts. Automaton has 25566 states and 62154 transitions. Word has length 25 [2021-08-06 19:31:39,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:39,551 INFO L470 AbstractCegarLoop]: Abstraction has 25566 states and 62154 transitions. [2021-08-06 19:31:39,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:31:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 25566 states and 62154 transitions. [2021-08-06 19:31:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:39,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:39,583 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:39,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:39,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:39,792 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:39,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:39,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1364758364, now seen corresponding path program 31 times [2021-08-06 19:31:39,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:39,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116883763] [2021-08-06 19:31:39,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:39,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:39,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:39,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116883763] [2021-08-06 19:31:39,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116883763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:39,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732850099] [2021-08-06 19:31:39,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:31:39,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:39,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:39,841 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:39,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 19:31:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:41,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:31:41,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:41,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732850099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:41,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:41,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:31:41,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041675760] [2021-08-06 19:31:41,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:31:41,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:41,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:31:41,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:41,616 INFO L87 Difference]: Start difference. First operand 25566 states and 62154 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:42,073 INFO L93 Difference]: Finished difference Result 25827 states and 62553 transitions. [2021-08-06 19:31:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 19:31:42,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:31:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:42,131 INFO L225 Difference]: With dead ends: 25827 [2021-08-06 19:31:42,131 INFO L226 Difference]: Without dead ends: 25815 [2021-08-06 19:31:42,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 321.4ms TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:31:42,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25815 states. [2021-08-06 19:31:42,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25815 to 25594. [2021-08-06 19:31:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25594 states, 25593 states have (on average 2.4310162935177586) internal successors, (62217), 25593 states have internal predecessors, (62217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25594 states to 25594 states and 62217 transitions. [2021-08-06 19:31:42,655 INFO L78 Accepts]: Start accepts. Automaton has 25594 states and 62217 transitions. Word has length 25 [2021-08-06 19:31:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:42,655 INFO L470 AbstractCegarLoop]: Abstraction has 25594 states and 62217 transitions. [2021-08-06 19:31:42,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 25594 states and 62217 transitions. [2021-08-06 19:31:42,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:42,692 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:42,692 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:42,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:42,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:42,893 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:42,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:42,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2008421224, now seen corresponding path program 32 times [2021-08-06 19:31:42,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:42,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651782724] [2021-08-06 19:31:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:42,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:42,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:42,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651782724] [2021-08-06 19:31:42,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651782724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:42,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058181812] [2021-08-06 19:31:42,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:42,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:42,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:42,957 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:42,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 19:31:44,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:44,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:44,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:31:44,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:44,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058181812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:44,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:44,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:31:44,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191743105] [2021-08-06 19:31:44,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:31:44,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:44,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:31:44,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:44,743 INFO L87 Difference]: Start difference. First operand 25594 states and 62217 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:45,351 INFO L93 Difference]: Finished difference Result 26075 states and 62991 transitions. [2021-08-06 19:31:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 19:31:45,352 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:31:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:45,412 INFO L225 Difference]: With dead ends: 26075 [2021-08-06 19:31:45,412 INFO L226 Difference]: Without dead ends: 26069 [2021-08-06 19:31:45,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 438.6ms TimeCoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 19:31:45,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26069 states. [2021-08-06 19:31:45,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26069 to 25678. [2021-08-06 19:31:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25678 states, 25677 states have (on average 2.429177863457569) internal successors, (62374), 25677 states have internal predecessors, (62374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25678 states to 25678 states and 62374 transitions. [2021-08-06 19:31:45,839 INFO L78 Accepts]: Start accepts. Automaton has 25678 states and 62374 transitions. Word has length 25 [2021-08-06 19:31:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:45,839 INFO L470 AbstractCegarLoop]: Abstraction has 25678 states and 62374 transitions. [2021-08-06 19:31:45,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:45,839 INFO L276 IsEmpty]: Start isEmpty. Operand 25678 states and 62374 transitions. [2021-08-06 19:31:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:45,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:45,877 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:45,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:46,077 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,SelfDestructingSolverStorable65 [2021-08-06 19:31:46,077 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:46,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:46,078 INFO L82 PathProgramCache]: Analyzing trace with hash 516926312, now seen corresponding path program 33 times [2021-08-06 19:31:46,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:46,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051653696] [2021-08-06 19:31:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:46,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:46,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:46,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051653696] [2021-08-06 19:31:46,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051653696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:46,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685662111] [2021-08-06 19:31:46,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:31:46,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:46,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:46,139 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:46,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 19:31:47,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:31:47,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:47,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:31:47,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:47,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685662111] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:47,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:47,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:31:47,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602656123] [2021-08-06 19:31:47,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:31:47,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:47,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:31:47,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:31:47,958 INFO L87 Difference]: Start difference. First operand 25678 states and 62374 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:48,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:48,768 INFO L93 Difference]: Finished difference Result 26028 states and 62928 transitions. [2021-08-06 19:31:48,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 19:31:48,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:31:48,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:48,816 INFO L225 Difference]: With dead ends: 26028 [2021-08-06 19:31:48,816 INFO L226 Difference]: Without dead ends: 26028 [2021-08-06 19:31:48,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 587.2ms TimeCoverageRelationStatistics Valid=561, Invalid=1601, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 19:31:48,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26028 states. [2021-08-06 19:31:49,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26028 to 25702. [2021-08-06 19:31:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25702 states, 25701 states have (on average 2.428115637523832) internal successors, (62405), 25701 states have internal predecessors, (62405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25702 states to 25702 states and 62405 transitions. [2021-08-06 19:31:49,255 INFO L78 Accepts]: Start accepts. Automaton has 25702 states and 62405 transitions. Word has length 25 [2021-08-06 19:31:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:49,255 INFO L470 AbstractCegarLoop]: Abstraction has 25702 states and 62405 transitions. [2021-08-06 19:31:49,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:31:49,255 INFO L276 IsEmpty]: Start isEmpty. Operand 25702 states and 62405 transitions. [2021-08-06 19:31:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:49,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:49,291 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:49,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 19:31:49,501 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,SelfDestructingSolverStorable66 [2021-08-06 19:31:49,501 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:49,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1784629408, now seen corresponding path program 26 times [2021-08-06 19:31:49,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:49,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184522166] [2021-08-06 19:31:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:49,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:49,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:49,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184522166] [2021-08-06 19:31:49,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184522166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:49,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636329298] [2021-08-06 19:31:49,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:31:49,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:49,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:49,557 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:49,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 19:31:51,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:31:51,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:51,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:31:51,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:31:51,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636329298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:51,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:51,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-06 19:31:51,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16228540] [2021-08-06 19:31:51,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:31:51,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:51,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:31:51,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:31:51,385 INFO L87 Difference]: Start difference. First operand 25702 states and 62405 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:51,641 INFO L93 Difference]: Finished difference Result 34903 states and 83144 transitions. [2021-08-06 19:31:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:31:51,641 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 19:31:51,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:51,721 INFO L225 Difference]: With dead ends: 34903 [2021-08-06 19:31:51,721 INFO L226 Difference]: Without dead ends: 34901 [2021-08-06 19:31:51,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:31:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34901 states. [2021-08-06 19:31:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34901 to 30756. [2021-08-06 19:31:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30756 states, 30755 states have (on average 2.4291985043082427) internal successors, (74710), 30755 states have internal predecessors, (74710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30756 states to 30756 states and 74710 transitions. [2021-08-06 19:31:52,261 INFO L78 Accepts]: Start accepts. Automaton has 30756 states and 74710 transitions. Word has length 25 [2021-08-06 19:31:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:52,261 INFO L470 AbstractCegarLoop]: Abstraction has 30756 states and 74710 transitions. [2021-08-06 19:31:52,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:52,262 INFO L276 IsEmpty]: Start isEmpty. Operand 30756 states and 74710 transitions. [2021-08-06 19:31:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:52,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:52,304 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:52,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 19:31:52,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:52,505 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:52,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:52,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1482770144, now seen corresponding path program 34 times [2021-08-06 19:31:52,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:52,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478937297] [2021-08-06 19:31:52,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:52,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:52,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:52,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478937297] [2021-08-06 19:31:52,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478937297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:52,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902503169] [2021-08-06 19:31:52,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:31:52,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:52,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:52,560 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:52,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 19:31:54,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:31:54,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:54,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:31:54,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:54,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902503169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:54,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:54,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:31:54,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231866825] [2021-08-06 19:31:54,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:54,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:54,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:54,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:54,404 INFO L87 Difference]: Start difference. First operand 30756 states and 74710 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:31:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:31:55,932 INFO L93 Difference]: Finished difference Result 63290 states and 147049 transitions. [2021-08-06 19:31:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 19:31:55,933 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:31:55,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:31:56,074 INFO L225 Difference]: With dead ends: 63290 [2021-08-06 19:31:56,074 INFO L226 Difference]: Without dead ends: 63282 [2021-08-06 19:31:56,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 992.2ms TimeCoverageRelationStatistics Valid=1049, Invalid=3507, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 19:31:56,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63282 states. [2021-08-06 19:31:56,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63282 to 32847. [2021-08-06 19:31:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32847 states, 32846 states have (on average 2.4371917432868537) internal successors, (80052), 32846 states have internal predecessors, (80052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:31:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32847 states to 32847 states and 80052 transitions. [2021-08-06 19:31:57,156 INFO L78 Accepts]: Start accepts. Automaton has 32847 states and 80052 transitions. Word has length 25 [2021-08-06 19:31:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:31:57,156 INFO L470 AbstractCegarLoop]: Abstraction has 32847 states and 80052 transitions. [2021-08-06 19:31:57,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:31:57,156 INFO L276 IsEmpty]: Start isEmpty. Operand 32847 states and 80052 transitions. [2021-08-06 19:31:57,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:31:57,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:31:57,202 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:31:57,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-06 19:31:57,402 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,SelfDestructingSolverStorable68 [2021-08-06 19:31:57,402 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:31:57,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:31:57,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2071944872, now seen corresponding path program 35 times [2021-08-06 19:31:57,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:31:57,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322502548] [2021-08-06 19:31:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:31:57,403 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:31:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:31:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:57,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:31:57,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322502548] [2021-08-06 19:31:57,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322502548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:57,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021315581] [2021-08-06 19:31:57,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:31:57,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:31:57,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:31:57,540 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:31:57,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 19:31:59,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:31:59,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:31:59,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:31:59,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:31:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:31:59,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021315581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:31:59,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:31:59,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:31:59,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54899035] [2021-08-06 19:31:59,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:31:59,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:31:59,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:31:59,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:31:59,405 INFO L87 Difference]: Start difference. First operand 32847 states and 80052 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:32:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:00,671 INFO L93 Difference]: Finished difference Result 51275 states and 121322 transitions. [2021-08-06 19:32:00,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 19:32:00,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:32:00,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:00,823 INFO L225 Difference]: With dead ends: 51275 [2021-08-06 19:32:00,888 INFO L226 Difference]: Without dead ends: 51269 [2021-08-06 19:32:00,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 840.5ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 19:32:00,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51269 states. [2021-08-06 19:32:01,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51269 to 34433. [2021-08-06 19:32:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34433 states, 34432 states have (on average 2.4446445167286246) internal successors, (84174), 34432 states have internal predecessors, (84174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34433 states to 34433 states and 84174 transitions. [2021-08-06 19:32:01,573 INFO L78 Accepts]: Start accepts. Automaton has 34433 states and 84174 transitions. Word has length 25 [2021-08-06 19:32:01,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:01,573 INFO L470 AbstractCegarLoop]: Abstraction has 34433 states and 84174 transitions. [2021-08-06 19:32:01,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:32:01,573 INFO L276 IsEmpty]: Start isEmpty. Operand 34433 states and 84174 transitions. [2021-08-06 19:32:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:32:01,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:01,618 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:01,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-06 19:32:01,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 19:32:01,819 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:32:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:01,819 INFO L82 PathProgramCache]: Analyzing trace with hash 665927336, now seen corresponding path program 36 times [2021-08-06 19:32:01,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:01,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920367296] [2021-08-06 19:32:01,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:01,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:01,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:01,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920367296] [2021-08-06 19:32:01,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920367296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:01,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460233042] [2021-08-06 19:32:01,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:01,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:01,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:01,885 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:01,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 19:32:03,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 19:32:03,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:03,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:32:03,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:03,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460233042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:03,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:03,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:32:03,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627359429] [2021-08-06 19:32:03,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:03,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:03,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:03,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:03,965 INFO L87 Difference]: Start difference. First operand 34433 states and 84174 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:32:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:05,419 INFO L93 Difference]: Finished difference Result 67784 states and 157866 transitions. [2021-08-06 19:32:05,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 19:32:05,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:32:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:05,625 INFO L225 Difference]: With dead ends: 67784 [2021-08-06 19:32:05,625 INFO L226 Difference]: Without dead ends: 67776 [2021-08-06 19:32:05,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 951.1ms TimeCoverageRelationStatistics Valid=854, Invalid=2806, Unknown=0, NotChecked=0, Total=3660 [2021-08-06 19:32:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67776 states. [2021-08-06 19:32:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67776 to 35613. [2021-08-06 19:32:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35613 states, 35612 states have (on average 2.445776704481635) internal successors, (87099), 35612 states have internal predecessors, (87099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:06,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35613 states to 35613 states and 87099 transitions. [2021-08-06 19:32:06,729 INFO L78 Accepts]: Start accepts. Automaton has 35613 states and 87099 transitions. Word has length 25 [2021-08-06 19:32:06,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:06,729 INFO L470 AbstractCegarLoop]: Abstraction has 35613 states and 87099 transitions. [2021-08-06 19:32:06,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:32:06,730 INFO L276 IsEmpty]: Start isEmpty. Operand 35613 states and 87099 transitions. [2021-08-06 19:32:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:32:06,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:06,790 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:06,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 19:32:06,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:06,991 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:32:06,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:06,991 INFO L82 PathProgramCache]: Analyzing trace with hash -22310556, now seen corresponding path program 27 times [2021-08-06 19:32:06,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:06,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059268593] [2021-08-06 19:32:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:06,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:07,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:07,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059268593] [2021-08-06 19:32:07,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059268593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:07,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883412539] [2021-08-06 19:32:07,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:07,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:07,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:07,036 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:07,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 19:32:08,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:32:08,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:08,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:32:08,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:32:09,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883412539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:09,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:09,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 19:32:09,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50611151] [2021-08-06 19:32:09,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:32:09,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:09,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:32:09,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:32:09,067 INFO L87 Difference]: Start difference. First operand 35613 states and 87099 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-08-06 19:32:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:09,299 INFO L93 Difference]: Finished difference Result 46544 states and 111558 transitions. [2021-08-06 19:32:09,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:32:09,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 25 [2021-08-06 19:32:09,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:09,402 INFO L225 Difference]: With dead ends: 46544 [2021-08-06 19:32:09,402 INFO L226 Difference]: Without dead ends: 46544 [2021-08-06 19:32:09,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:32:09,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46544 states. [2021-08-06 19:32:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46544 to 39733. [2021-08-06 19:32:10,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39733 states, 39732 states have (on average 2.4413067552602437) internal successors, (96998), 39732 states have internal predecessors, (96998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39733 states to 39733 states and 96998 transitions. [2021-08-06 19:32:10,332 INFO L78 Accepts]: Start accepts. Automaton has 39733 states and 96998 transitions. Word has length 25 [2021-08-06 19:32:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:10,332 INFO L470 AbstractCegarLoop]: Abstraction has 39733 states and 96998 transitions. [2021-08-06 19:32:10,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-08-06 19:32:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 39733 states and 96998 transitions. [2021-08-06 19:32:10,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:32:10,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:10,387 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:10,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:10,587 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,SelfDestructingSolverStorable71 [2021-08-06 19:32:10,588 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:32:10,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:10,588 INFO L82 PathProgramCache]: Analyzing trace with hash 634970596, now seen corresponding path program 37 times [2021-08-06 19:32:10,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:10,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124533373] [2021-08-06 19:32:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:10,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:10,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:10,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124533373] [2021-08-06 19:32:10,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124533373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:10,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29678246] [2021-08-06 19:32:10,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:10,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:10,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:10,643 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:10,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 19:32:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:12,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:32:12,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:12,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:12,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29678246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:12,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:12,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:32:12,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303007570] [2021-08-06 19:32:12,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:12,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:12,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:12,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:12,669 INFO L87 Difference]: Start difference. First operand 39733 states and 96998 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:32:13,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:13,830 INFO L93 Difference]: Finished difference Result 66273 states and 155676 transitions. [2021-08-06 19:32:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 19:32:13,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:32:13,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:14,013 INFO L225 Difference]: With dead ends: 66273 [2021-08-06 19:32:14,013 INFO L226 Difference]: Without dead ends: 66273 [2021-08-06 19:32:14,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 729.0ms TimeCoverageRelationStatistics Valid=564, Invalid=1788, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 19:32:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66273 states. [2021-08-06 19:32:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66273 to 41010. [2021-08-06 19:32:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41010 states, 41009 states have (on average 2.443878173083957) internal successors, (100221), 41009 states have internal predecessors, (100221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41010 states to 41010 states and 100221 transitions. [2021-08-06 19:32:15,086 INFO L78 Accepts]: Start accepts. Automaton has 41010 states and 100221 transitions. Word has length 25 [2021-08-06 19:32:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:15,086 INFO L470 AbstractCegarLoop]: Abstraction has 41010 states and 100221 transitions. [2021-08-06 19:32:15,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:32:15,086 INFO L276 IsEmpty]: Start isEmpty. Operand 41010 states and 100221 transitions. [2021-08-06 19:32:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:32:15,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:15,141 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:15,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:15,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:15,342 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:32:15,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:15,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1501121448, now seen corresponding path program 28 times [2021-08-06 19:32:15,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:15,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229044709] [2021-08-06 19:32:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:15,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:15,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:15,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229044709] [2021-08-06 19:32:15,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229044709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:15,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013195135] [2021-08-06 19:32:15,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:15,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:15,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:15,405 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:15,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 19:32:17,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:17,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:17,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:32:17,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:17,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013195135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:17,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:17,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 19:32:17,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944372566] [2021-08-06 19:32:17,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:32:17,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:17,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:32:17,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:32:17,539 INFO L87 Difference]: Start difference. First operand 41010 states and 100221 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:32:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:18,461 INFO L93 Difference]: Finished difference Result 41423 states and 100981 transitions. [2021-08-06 19:32:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 19:32:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 25 [2021-08-06 19:32:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:18,542 INFO L225 Difference]: With dead ends: 41423 [2021-08-06 19:32:18,542 INFO L226 Difference]: Without dead ends: 41423 [2021-08-06 19:32:18,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 631.1ms TimeCoverageRelationStatistics Valid=440, Invalid=1630, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 19:32:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41423 states. [2021-08-06 19:32:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41423 to 40962. [2021-08-06 19:32:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40962 states, 40961 states have (on average 2.444105368521276) internal successors, (100113), 40961 states have internal predecessors, (100113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40962 states to 40962 states and 100113 transitions. [2021-08-06 19:32:19,247 INFO L78 Accepts]: Start accepts. Automaton has 40962 states and 100113 transitions. Word has length 25 [2021-08-06 19:32:19,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:19,247 INFO L470 AbstractCegarLoop]: Abstraction has 40962 states and 100113 transitions. [2021-08-06 19:32:19,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:32:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 40962 states and 100113 transitions. [2021-08-06 19:32:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:32:19,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:19,302 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:19,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:19,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:19,502 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:32:19,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:19,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1849570136, now seen corresponding path program 38 times [2021-08-06 19:32:19,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:19,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476577457] [2021-08-06 19:32:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:19,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:19,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:19,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476577457] [2021-08-06 19:32:19,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476577457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:19,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437383139] [2021-08-06 19:32:19,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:32:19,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:19,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:19,567 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:19,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 19:32:21,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:32:21,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:21,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:32:21,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:21,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437383139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:21,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:21,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:32:21,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694064334] [2021-08-06 19:32:21,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:21,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:21,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:21,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:21,673 INFO L87 Difference]: Start difference. First operand 40962 states and 100113 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:32:22,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:22,739 INFO L93 Difference]: Finished difference Result 69939 states and 159762 transitions. [2021-08-06 19:32:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 19:32:22,740 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:32:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:22,901 INFO L225 Difference]: With dead ends: 69939 [2021-08-06 19:32:22,901 INFO L226 Difference]: Without dead ends: 69939 [2021-08-06 19:32:22,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 704.8ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 19:32:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69939 states. [2021-08-06 19:32:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69939 to 41042. [2021-08-06 19:32:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41042 states, 41041 states have (on average 2.4447260057016154) internal successors, (100334), 41041 states have internal predecessors, (100334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41042 states to 41042 states and 100334 transitions. [2021-08-06 19:32:24,014 INFO L78 Accepts]: Start accepts. Automaton has 41042 states and 100334 transitions. Word has length 25 [2021-08-06 19:32:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:24,014 INFO L470 AbstractCegarLoop]: Abstraction has 41042 states and 100334 transitions. [2021-08-06 19:32:24,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:32:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 41042 states and 100334 transitions. [2021-08-06 19:32:24,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:32:24,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:24,070 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:24,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-06 19:32:24,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:24,270 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:32:24,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:24,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1688819940, now seen corresponding path program 29 times [2021-08-06 19:32:24,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:24,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358917729] [2021-08-06 19:32:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:24,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:24,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:24,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358917729] [2021-08-06 19:32:24,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358917729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:24,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162868676] [2021-08-06 19:32:24,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:24,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:24,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:24,350 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:24,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 19:32:26,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 19:32:26,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:26,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:32:26,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:26,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162868676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:26,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:26,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 19:32:26,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189329476] [2021-08-06 19:32:26,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:32:26,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:32:26,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:32:26,605 INFO L87 Difference]: Start difference. First operand 41042 states and 100334 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:32:27,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:27,162 INFO L93 Difference]: Finished difference Result 41536 states and 101198 transitions. [2021-08-06 19:32:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:32:27,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 25 [2021-08-06 19:32:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:27,244 INFO L225 Difference]: With dead ends: 41536 [2021-08-06 19:32:27,245 INFO L226 Difference]: Without dead ends: 41528 [2021-08-06 19:32:27,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-08-06 19:32:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41528 states. [2021-08-06 19:32:27,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41528 to 41258. [2021-08-06 19:32:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41258 states, 41257 states have (on average 2.4420340790653707) internal successors, (100751), 41257 states have internal predecessors, (100751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41258 states to 41258 states and 100751 transitions. [2021-08-06 19:32:28,022 INFO L78 Accepts]: Start accepts. Automaton has 41258 states and 100751 transitions. Word has length 25 [2021-08-06 19:32:28,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:28,023 INFO L470 AbstractCegarLoop]: Abstraction has 41258 states and 100751 transitions. [2021-08-06 19:32:28,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:32:28,023 INFO L276 IsEmpty]: Start isEmpty. Operand 41258 states and 100751 transitions. [2021-08-06 19:32:28,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:32:28,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:28,078 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:28,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 19:32:28,278 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,SelfDestructingSolverStorable75 [2021-08-06 19:32:28,278 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:32:28,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:28,279 INFO L82 PathProgramCache]: Analyzing trace with hash 197325028, now seen corresponding path program 30 times [2021-08-06 19:32:28,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:28,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321924938] [2021-08-06 19:32:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:28,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:28,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:28,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321924938] [2021-08-06 19:32:28,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321924938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:28,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143195382] [2021-08-06 19:32:28,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:28,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:28,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:28,346 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:28,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 19:32:30,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:32:30,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:30,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:32:30,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:30,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143195382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:30,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:30,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 19:32:30,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899252415] [2021-08-06 19:32:30,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:32:30,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:30,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:32:30,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:32:30,476 INFO L87 Difference]: Start difference. First operand 41258 states and 100751 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:32:31,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:31,322 INFO L93 Difference]: Finished difference Result 41469 states and 101092 transitions. [2021-08-06 19:32:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 19:32:31,322 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 25 [2021-08-06 19:32:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:31,407 INFO L225 Difference]: With dead ends: 41469 [2021-08-06 19:32:31,407 INFO L226 Difference]: Without dead ends: 41469 [2021-08-06 19:32:31,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 542.6ms TimeCoverageRelationStatistics Valid=401, Invalid=1579, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 19:32:31,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41469 states. [2021-08-06 19:32:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41469 to 41228. [2021-08-06 19:32:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41228 states, 41227 states have (on average 2.442210202052053) internal successors, (100685), 41227 states have internal predecessors, (100685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:32,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41228 states to 41228 states and 100685 transitions. [2021-08-06 19:32:32,115 INFO L78 Accepts]: Start accepts. Automaton has 41228 states and 100685 transitions. Word has length 25 [2021-08-06 19:32:32,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:32,116 INFO L470 AbstractCegarLoop]: Abstraction has 41228 states and 100685 transitions. [2021-08-06 19:32:32,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:32:32,116 INFO L276 IsEmpty]: Start isEmpty. Operand 41228 states and 100685 transitions. [2021-08-06 19:32:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:32:32,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:32,171 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:32,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 19:32:32,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:32,371 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:32:32,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:32,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1033027108, now seen corresponding path program 39 times [2021-08-06 19:32:32,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:32,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669310468] [2021-08-06 19:32:32,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:32,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:32,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:32,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669310468] [2021-08-06 19:32:32,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669310468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:32,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990696294] [2021-08-06 19:32:32,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:32:32,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:32,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:32,438 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:32,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 19:32:34,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:32:34,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:34,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:32:34,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:34,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990696294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:34,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:34,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:32:34,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863296125] [2021-08-06 19:32:34,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:34,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:34,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:34,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:34,654 INFO L87 Difference]: Start difference. First operand 41228 states and 100685 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:32:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:35,815 INFO L93 Difference]: Finished difference Result 75946 states and 176798 transitions. [2021-08-06 19:32:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 19:32:35,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:32:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:35,986 INFO L225 Difference]: With dead ends: 75946 [2021-08-06 19:32:35,987 INFO L226 Difference]: Without dead ends: 75944 [2021-08-06 19:32:35,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 689.7ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 19:32:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75944 states. [2021-08-06 19:32:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75944 to 42891. [2021-08-06 19:32:37,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42891 states, 42890 states have (on average 2.4465376544649104) internal successors, (104932), 42890 states have internal predecessors, (104932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42891 states to 42891 states and 104932 transitions. [2021-08-06 19:32:37,292 INFO L78 Accepts]: Start accepts. Automaton has 42891 states and 104932 transitions. Word has length 25 [2021-08-06 19:32:37,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:37,292 INFO L470 AbstractCegarLoop]: Abstraction has 42891 states and 104932 transitions. [2021-08-06 19:32:37,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:32:37,292 INFO L276 IsEmpty]: Start isEmpty. Operand 42891 states and 104932 transitions. [2021-08-06 19:32:37,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:32:37,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:37,362 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:37,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:37,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:37,562 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:32:37,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:37,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1114595804, now seen corresponding path program 40 times [2021-08-06 19:32:37,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:37,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653428156] [2021-08-06 19:32:37,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:37,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:37,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:37,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653428156] [2021-08-06 19:32:37,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653428156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:37,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865754218] [2021-08-06 19:32:37,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:37,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:37,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:37,633 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:37,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 19:32:39,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:32:39,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:39,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:32:39,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:39,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865754218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:39,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:39,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-08-06 19:32:39,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215252268] [2021-08-06 19:32:39,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:32:39,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:39,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:32:39,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:32:39,836 INFO L87 Difference]: Start difference. First operand 42891 states and 104932 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 19:32:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:41,227 INFO L93 Difference]: Finished difference Result 81934 states and 189327 transitions. [2021-08-06 19:32:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 19:32:41,228 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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 25 [2021-08-06 19:32:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:41,439 INFO L225 Difference]: With dead ends: 81934 [2021-08-06 19:32:41,439 INFO L226 Difference]: Without dead ends: 81934 [2021-08-06 19:32:41,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 958.7ms TimeCoverageRelationStatistics Valid=749, Invalid=2443, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 19:32:41,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81934 states. [2021-08-06 19:32:42,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81934 to 42556. [2021-08-06 19:32:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42556 states, 42555 states have (on average 2.4457055575138056) internal successors, (104077), 42555 states have internal predecessors, (104077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42556 states to 42556 states and 104077 transitions. [2021-08-06 19:32:42,687 INFO L78 Accepts]: Start accepts. Automaton has 42556 states and 104077 transitions. Word has length 25 [2021-08-06 19:32:42,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:42,688 INFO L470 AbstractCegarLoop]: Abstraction has 42556 states and 104077 transitions. [2021-08-06 19:32:42,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 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) [2021-08-06 19:32:42,688 INFO L276 IsEmpty]: Start isEmpty. Operand 42556 states and 104077 transitions. [2021-08-06 19:32:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:32:42,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:42,758 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:42,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 19:32:42,958 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,SelfDestructingSolverStorable78 [2021-08-06 19:32:42,959 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:32:42,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:42,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1659016996, now seen corresponding path program 41 times [2021-08-06 19:32:42,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:42,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592434786] [2021-08-06 19:32:42,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:42,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:43,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:43,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592434786] [2021-08-06 19:32:43,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592434786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:43,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557995525] [2021-08-06 19:32:43,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:32:43,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:43,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:43,029 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:43,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 19:32:45,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:32:45,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:32:45,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:45,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557995525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:45,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:45,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 19:32:45,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67731203] [2021-08-06 19:32:45,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:32:45,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:32:45,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:32:45,351 INFO L87 Difference]: Start difference. First operand 42556 states and 104077 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:32:46,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:46,011 INFO L93 Difference]: Finished difference Result 42762 states and 104454 transitions. [2021-08-06 19:32:46,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:32:46,011 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 25 [2021-08-06 19:32:46,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:46,101 INFO L225 Difference]: With dead ends: 42762 [2021-08-06 19:32:46,101 INFO L226 Difference]: Without dead ends: 42762 [2021-08-06 19:32:46,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 19:32:46,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42762 states. [2021-08-06 19:32:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42762 to 42566. [2021-08-06 19:32:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42566 states, 42565 states have (on average 2.445553858804182) internal successors, (104095), 42565 states have internal predecessors, (104095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42566 states to 42566 states and 104095 transitions. [2021-08-06 19:32:46,972 INFO L78 Accepts]: Start accepts. Automaton has 42566 states and 104095 transitions. Word has length 25 [2021-08-06 19:32:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:46,972 INFO L470 AbstractCegarLoop]: Abstraction has 42566 states and 104095 transitions. [2021-08-06 19:32:46,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:32:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 42566 states and 104095 transitions. [2021-08-06 19:32:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:32:47,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:47,026 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:47,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 19:32:47,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-06 19:32:47,226 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:32:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:47,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1298766364, now seen corresponding path program 42 times [2021-08-06 19:32:47,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:47,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460552580] [2021-08-06 19:32:47,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:47,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:47,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:47,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460552580] [2021-08-06 19:32:47,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460552580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:47,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815131173] [2021-08-06 19:32:47,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:32:47,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:47,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:47,276 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:47,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 19:32:49,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:32:49,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:32:49,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:32:49,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:49,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815131173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:49,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:49,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:32:49,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36873296] [2021-08-06 19:32:49,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:32:49,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:49,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:32:49,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:32:49,494 INFO L87 Difference]: Start difference. First operand 42566 states and 104095 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:32:50,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:50,842 INFO L93 Difference]: Finished difference Result 96710 states and 225104 transitions. [2021-08-06 19:32:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 19:32:50,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:32:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:51,203 INFO L225 Difference]: With dead ends: 96710 [2021-08-06 19:32:51,204 INFO L226 Difference]: Without dead ends: 96710 [2021-08-06 19:32:51,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 758.7ms TimeCoverageRelationStatistics Valid=981, Invalid=2325, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 19:32:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96710 states. [2021-08-06 19:32:52,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96710 to 67253. [2021-08-06 19:32:52,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67253 states, 67252 states have (on average 2.487866531850354) internal successors, (167314), 67252 states have internal predecessors, (167314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:53,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67253 states to 67253 states and 167314 transitions. [2021-08-06 19:32:53,250 INFO L78 Accepts]: Start accepts. Automaton has 67253 states and 167314 transitions. Word has length 25 [2021-08-06 19:32:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:53,251 INFO L470 AbstractCegarLoop]: Abstraction has 67253 states and 167314 transitions. [2021-08-06 19:32:53,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:32:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 67253 states and 167314 transitions. [2021-08-06 19:32:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:32:53,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:53,356 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:53,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:53,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:53,556 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:32:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:53,557 INFO L82 PathProgramCache]: Analyzing trace with hash -385275684, now seen corresponding path program 43 times [2021-08-06 19:32:53,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:53,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256286875] [2021-08-06 19:32:53,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:53,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:53,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:53,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:53,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256286875] [2021-08-06 19:32:53,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256286875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:53,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148869400] [2021-08-06 19:32:53,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:32:53,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:53,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:53,621 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:53,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 19:32:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:55,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:32:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:32:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:56,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148869400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:56,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:32:56,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 19:32:56,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020502912] [2021-08-06 19:32:56,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:32:56,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:32:56,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:32:56,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:32:56,018 INFO L87 Difference]: Start difference. First operand 67253 states and 167314 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:32:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:32:56,920 INFO L93 Difference]: Finished difference Result 67439 states and 167646 transitions. [2021-08-06 19:32:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 19:32:56,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 25 [2021-08-06 19:32:56,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:32:57,084 INFO L225 Difference]: With dead ends: 67439 [2021-08-06 19:32:57,085 INFO L226 Difference]: Without dead ends: 67439 [2021-08-06 19:32:57,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 530.3ms TimeCoverageRelationStatistics Valid=398, Invalid=1242, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 19:32:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67439 states. [2021-08-06 19:32:58,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67439 to 67249. [2021-08-06 19:32:58,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67249 states, 67248 states have (on average 2.4878806804663336) internal successors, (167305), 67248 states have internal predecessors, (167305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:32:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67249 states to 67249 states and 167305 transitions. [2021-08-06 19:32:58,705 INFO L78 Accepts]: Start accepts. Automaton has 67249 states and 167305 transitions. Word has length 25 [2021-08-06 19:32:58,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:32:58,705 INFO L470 AbstractCegarLoop]: Abstraction has 67249 states and 167305 transitions. [2021-08-06 19:32:58,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:32:58,705 INFO L276 IsEmpty]: Start isEmpty. Operand 67249 states and 167305 transitions. [2021-08-06 19:32:58,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:32:58,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:32:58,806 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:32:58,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 19:32:59,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:59,009 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:32:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:32:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2038461020, now seen corresponding path program 4 times [2021-08-06 19:32:59,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:32:59,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166017696] [2021-08-06 19:32:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:32:59,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:32:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:32:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:32:59,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:32:59,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166017696] [2021-08-06 19:32:59,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166017696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:32:59,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968039315] [2021-08-06 19:32:59,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:32:59,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:32:59,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:32:59,049 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:32:59,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 19:33:01,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:33:01,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:01,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:33:01,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:01,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968039315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:01,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:01,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-06 19:33:01,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850832825] [2021-08-06 19:33:01,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 19:33:01,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:01,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 19:33:01,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 19:33:01,355 INFO L87 Difference]: Start difference. First operand 67249 states and 167305 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-08-06 19:33:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:01,808 INFO L93 Difference]: Finished difference Result 91810 states and 222486 transitions. [2021-08-06 19:33:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:33:01,809 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 25 [2021-08-06 19:33:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:02,047 INFO L225 Difference]: With dead ends: 91810 [2021-08-06 19:33:02,047 INFO L226 Difference]: Without dead ends: 91810 [2021-08-06 19:33:02,047 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-08-06 19:33:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91810 states. [2021-08-06 19:33:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91810 to 75563. [2021-08-06 19:33:03,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75563 states, 75562 states have (on average 2.490259654323602) internal successors, (188169), 75562 states have internal predecessors, (188169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75563 states to 75563 states and 188169 transitions. [2021-08-06 19:33:04,182 INFO L78 Accepts]: Start accepts. Automaton has 75563 states and 188169 transitions. Word has length 25 [2021-08-06 19:33:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:04,182 INFO L470 AbstractCegarLoop]: Abstraction has 75563 states and 188169 transitions. [2021-08-06 19:33:04,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-08-06 19:33:04,182 INFO L276 IsEmpty]: Start isEmpty. Operand 75563 states and 188169 transitions. [2021-08-06 19:33:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:33:04,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:04,299 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:04,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 19:33:04,499 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,SelfDestructingSolverStorable82 [2021-08-06 19:33:04,499 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:33:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:04,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1235862368, now seen corresponding path program 44 times [2021-08-06 19:33:04,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:04,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935415308] [2021-08-06 19:33:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:04,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:04,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:04,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935415308] [2021-08-06 19:33:04,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935415308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:04,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751184995] [2021-08-06 19:33:04,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 19:33:04,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:04,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:04,837 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:04,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 19:33:06,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 19:33:06,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:33:06,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:07,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751184995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:07,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:07,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 19:33:07,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598699813] [2021-08-06 19:33:07,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:33:07,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:07,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:33:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:33:07,203 INFO L87 Difference]: Start difference. First operand 75563 states and 188169 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:33:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:08,098 INFO L93 Difference]: Finished difference Result 75721 states and 188452 transitions. [2021-08-06 19:33:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 19:33:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 25 [2021-08-06 19:33:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:08,307 INFO L225 Difference]: With dead ends: 75721 [2021-08-06 19:33:08,307 INFO L226 Difference]: Without dead ends: 75721 [2021-08-06 19:33:08,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=303, Invalid=1029, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 19:33:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75721 states. [2021-08-06 19:33:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75721 to 75555. [2021-08-06 19:33:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75555 states, 75554 states have (on average 2.4903512719379517) internal successors, (188156), 75554 states have internal predecessors, (188156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:09,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75555 states to 75555 states and 188156 transitions. [2021-08-06 19:33:09,917 INFO L78 Accepts]: Start accepts. Automaton has 75555 states and 188156 transitions. Word has length 25 [2021-08-06 19:33:09,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:09,917 INFO L470 AbstractCegarLoop]: Abstraction has 75555 states and 188156 transitions. [2021-08-06 19:33:09,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:33:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 75555 states and 188156 transitions. [2021-08-06 19:33:10,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:33:10,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:10,034 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:10,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:10,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:10,240 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:33:10,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:10,241 INFO L82 PathProgramCache]: Analyzing trace with hash -816414808, now seen corresponding path program 45 times [2021-08-06 19:33:10,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:10,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045365242] [2021-08-06 19:33:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:10,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:10,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:10,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045365242] [2021-08-06 19:33:10,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045365242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:10,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262582081] [2021-08-06 19:33:10,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 19:33:10,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:10,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:10,575 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:10,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 19:33:12,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 19:33:12,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:12,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:33:12,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:13,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262582081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:13,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:13,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:33:13,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781504693] [2021-08-06 19:33:13,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:33:13,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:13,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:33:13,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:33:13,089 INFO L87 Difference]: Start difference. First operand 75555 states and 188156 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:33:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:14,588 INFO L93 Difference]: Finished difference Result 108901 states and 262650 transitions. [2021-08-06 19:33:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 19:33:14,588 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:33:14,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:14,919 INFO L225 Difference]: With dead ends: 108901 [2021-08-06 19:33:14,919 INFO L226 Difference]: Without dead ends: 108895 [2021-08-06 19:33:14,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1076.0ms TimeCoverageRelationStatistics Valid=850, Invalid=2230, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 19:33:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108895 states. [2021-08-06 19:33:16,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108895 to 77028. [2021-08-06 19:33:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77028 states, 77027 states have (on average 2.492736313240812) internal successors, (192008), 77027 states have internal predecessors, (192008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:16,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77028 states to 77028 states and 192008 transitions. [2021-08-06 19:33:16,995 INFO L78 Accepts]: Start accepts. Automaton has 77028 states and 192008 transitions. Word has length 25 [2021-08-06 19:33:16,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:16,995 INFO L470 AbstractCegarLoop]: Abstraction has 77028 states and 192008 transitions. [2021-08-06 19:33:16,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:33:16,996 INFO L276 IsEmpty]: Start isEmpty. Operand 77028 states and 192008 transitions. [2021-08-06 19:33:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:33:17,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:17,141 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:17,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:17,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:17,342 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:33:17,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:17,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1289633184, now seen corresponding path program 46 times [2021-08-06 19:33:17,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:17,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087111966] [2021-08-06 19:33:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:17,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:17,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:17,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:17,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087111966] [2021-08-06 19:33:17,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087111966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:17,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376201941] [2021-08-06 19:33:17,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 19:33:17,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:17,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:17,700 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:17,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 19:33:19,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 19:33:19,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:19,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 19:33:19,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:20,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376201941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:20,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:20,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-08-06 19:33:20,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901892236] [2021-08-06 19:33:20,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 19:33:20,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:20,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 19:33:20,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-06 19:33:20,110 INFO L87 Difference]: Start difference. First operand 77028 states and 192008 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:33:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:21,512 INFO L93 Difference]: Finished difference Result 111801 states and 276954 transitions. [2021-08-06 19:33:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 19:33:21,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-08-06 19:33:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:21,846 INFO L225 Difference]: With dead ends: 111801 [2021-08-06 19:33:21,846 INFO L226 Difference]: Without dead ends: 111797 [2021-08-06 19:33:21,847 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 739.9ms TimeCoverageRelationStatistics Valid=647, Invalid=2005, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 19:33:22,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111797 states. [2021-08-06 19:33:23,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111797 to 81642. [2021-08-06 19:33:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81642 states, 81641 states have (on average 2.5040359623228525) internal successors, (204432), 81641 states have internal predecessors, (204432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:24,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81642 states to 81642 states and 204432 transitions. [2021-08-06 19:33:24,029 INFO L78 Accepts]: Start accepts. Automaton has 81642 states and 204432 transitions. Word has length 25 [2021-08-06 19:33:24,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:24,029 INFO L470 AbstractCegarLoop]: Abstraction has 81642 states and 204432 transitions. [2021-08-06 19:33:24,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2021-08-06 19:33:24,030 INFO L276 IsEmpty]: Start isEmpty. Operand 81642 states and 204432 transitions. [2021-08-06 19:33:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:33:24,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:24,155 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:24,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:24,355 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,SelfDestructingSolverStorable85 [2021-08-06 19:33:24,355 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:33:24,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:24,356 INFO L82 PathProgramCache]: Analyzing trace with hash -2081468896, now seen corresponding path program 5 times [2021-08-06 19:33:24,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:24,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968150539] [2021-08-06 19:33:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:24,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:24,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:24,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968150539] [2021-08-06 19:33:24,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968150539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:24,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643445214] [2021-08-06 19:33:24,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:33:24,678 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:24,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:24,693 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:24,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 19:33:26,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 19:33:26,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:26,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 19:33:26,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:26,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643445214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:26,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:26,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-08-06 19:33:26,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718542961] [2021-08-06 19:33:26,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 19:33:26,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:26,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 19:33:26,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-08-06 19:33:26,909 INFO L87 Difference]: Start difference. First operand 81642 states and 204432 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-08-06 19:33:27,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:27,413 INFO L93 Difference]: Finished difference Result 105074 states and 257760 transitions. [2021-08-06 19:33:27,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 19:33:27,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 25 [2021-08-06 19:33:27,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:27,709 INFO L225 Difference]: With dead ends: 105074 [2021-08-06 19:33:27,709 INFO L226 Difference]: Without dead ends: 105072 [2021-08-06 19:33:27,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-08-06 19:33:27,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105072 states. [2021-08-06 19:33:29,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105072 to 91481. [2021-08-06 19:33:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91481 states, 91480 states have (on average 2.5031591604722343) internal successors, (228989), 91480 states have internal predecessors, (228989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:30,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91481 states to 91481 states and 228989 transitions. [2021-08-06 19:33:30,194 INFO L78 Accepts]: Start accepts. Automaton has 91481 states and 228989 transitions. Word has length 25 [2021-08-06 19:33:30,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:30,194 INFO L470 AbstractCegarLoop]: Abstraction has 91481 states and 228989 transitions. [2021-08-06 19:33:30,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-08-06 19:33:30,194 INFO L276 IsEmpty]: Start isEmpty. Operand 91481 states and 228989 transitions. [2021-08-06 19:33:30,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:33:30,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:30,340 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:30,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:30,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:30,541 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:33:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:30,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1938159396, now seen corresponding path program 47 times [2021-08-06 19:33:30,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:30,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163095424] [2021-08-06 19:33:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:30,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:30,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:30,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163095424] [2021-08-06 19:33:30,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163095424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:30,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115771817] [2021-08-06 19:33:30,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 19:33:30,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:30,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:30,603 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:30,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 19:33:32,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 19:33:32,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:32,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:33:32,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:33,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115771817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:33,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:33,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-08-06 19:33:33,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687700712] [2021-08-06 19:33:33,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 19:33:33,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:33,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 19:33:33,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-06 19:33:33,094 INFO L87 Difference]: Start difference. First operand 91481 states and 228989 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:33:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:33,818 INFO L93 Difference]: Finished difference Result 92268 states and 230374 transitions. [2021-08-06 19:33:33,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 19:33:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 25 [2021-08-06 19:33:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:34,045 INFO L225 Difference]: With dead ends: 92268 [2021-08-06 19:33:34,045 INFO L226 Difference]: Without dead ends: 92256 [2021-08-06 19:33:34,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-08-06 19:33:34,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92256 states. [2021-08-06 19:33:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92256 to 91699. [2021-08-06 19:33:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91699 states, 91698 states have (on average 2.5018539117538006) internal successors, (229415), 91698 states have internal predecessors, (229415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91699 states to 91699 states and 229415 transitions. [2021-08-06 19:33:36,248 INFO L78 Accepts]: Start accepts. Automaton has 91699 states and 229415 transitions. Word has length 25 [2021-08-06 19:33:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:36,248 INFO L470 AbstractCegarLoop]: Abstraction has 91699 states and 229415 transitions. [2021-08-06 19:33:36,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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) [2021-08-06 19:33:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 91699 states and 229415 transitions. [2021-08-06 19:33:36,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:33:36,423 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:36,424 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:36,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:36,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:36,629 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:33:36,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:36,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1435020192, now seen corresponding path program 48 times [2021-08-06 19:33:36,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:36,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030630829] [2021-08-06 19:33:36,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:36,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:33:36,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:36,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030630829] [2021-08-06 19:33:36,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030630829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:36,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595530185] [2021-08-06 19:33:36,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 19:33:36,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:36,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:36,691 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:36,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 19:33:38,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 19:33:38,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 19:33:38,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 19:33:38,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 19:33:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 19:33:39,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595530185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:39,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 19:33:39,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-08-06 19:33:39,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216132806] [2021-08-06 19:33:39,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 19:33:39,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 19:33:39,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 19:33:39,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-08-06 19:33:39,231 INFO L87 Difference]: Start difference. First operand 91699 states and 229415 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:33:39,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 19:33:39,994 INFO L93 Difference]: Finished difference Result 91957 states and 229838 transitions. [2021-08-06 19:33:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 19:33:39,995 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-08-06 19:33:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 19:33:40,226 INFO L225 Difference]: With dead ends: 91957 [2021-08-06 19:33:40,226 INFO L226 Difference]: Without dead ends: 91953 [2021-08-06 19:33:40,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-08-06 19:33:40,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91953 states. [2021-08-06 19:33:41,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91953 to 91747. [2021-08-06 19:33:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91747 states, 91746 states have (on average 2.5014932531118523) internal successors, (229502), 91746 states have internal predecessors, (229502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 19:33:42,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91747 states to 91747 states and 229502 transitions. [2021-08-06 19:33:42,600 INFO L78 Accepts]: Start accepts. Automaton has 91747 states and 229502 transitions. Word has length 25 [2021-08-06 19:33:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 19:33:42,600 INFO L470 AbstractCegarLoop]: Abstraction has 91747 states and 229502 transitions. [2021-08-06 19:33:42,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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) [2021-08-06 19:33:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 91747 states and 229502 transitions. [2021-08-06 19:33:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 19:33:42,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 19:33:42,758 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 19:33:42,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 19:33:42,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-06 19:33:42,959 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 19:33:42,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 19:33:42,959 INFO L82 PathProgramCache]: Analyzing trace with hash -56474720, now seen corresponding path program 49 times [2021-08-06 19:33:42,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 19:33:42,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076468877] [2021-08-06 19:33:42,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 19:33:42,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 19:33:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 19:33:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 19:33:43,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 19:33:43,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076468877] [2021-08-06 19:33:43,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076468877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 19:33:43,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035887669] [2021-08-06 19:33:43,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 19:33:43,018 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 19:33:43,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 19:33:43,019 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 19:33:43,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process