/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 12:57:34,395 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 12:57:34,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 12:57:34,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-21 12:57:34,474 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-21 12:57:34,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 12:57:34,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 12:57:34,490 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-21 12:57:34,490 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-21 12:57:34,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 12:57:34,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 12:57:34,491 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 12:57:34,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 12:57:34,491 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 12:57:34,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 12:57:34,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 12:57:34,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 12:57:34,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 12:57:34,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 12:57:34,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 12:57:34,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 12:57:34,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 12:57:34,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 12:57:34,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 12:57:34,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 12:57:34,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 12:57:34,493 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 12:57:34,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 12:57:34,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:57:34,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 12:57:34,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 12:57:34,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 12:57:34,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 12:57:34,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 12:57:34,494 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 12:57:34,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 12:57:34,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 12:57:34,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 12:57:34,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 12:57:34,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 12:57:34,699 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 12:57:34,700 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 12:57:34,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl [2021-08-21 12:57:34,700 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-sum.wvr.bpl' [2021-08-21 12:57:34,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 12:57:34,738 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 12:57:34,739 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 12:57:34,739 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 12:57:34,739 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 12:57:34,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:57:34" (1/1) ... [2021-08-21 12:57:34,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:57:34" (1/1) ... [2021-08-21 12:57:34,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 12:57:34,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 12:57:34,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 12:57:34,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 12:57:34,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:57:34" (1/1) ... [2021-08-21 12:57:34,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:57:34" (1/1) ... [2021-08-21 12:57:34,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:57:34" (1/1) ... [2021-08-21 12:57:34,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:57:34" (1/1) ... [2021-08-21 12:57:34,771 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:57:34" (1/1) ... [2021-08-21 12:57:34,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:57:34" (1/1) ... [2021-08-21 12:57:34,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:57:34" (1/1) ... [2021-08-21 12:57:34,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 12:57:34,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 12:57:34,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 12:57:34,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 12:57:34,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:57:34" (1/1) ... [2021-08-21 12:57:34,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 12:57:34,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:34,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 12:57:34,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 12:57:34,837 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 12:57:34,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 12:57:34,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 12:57:34,838 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 12:57:34,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 12:57:34,838 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 12:57:34,838 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 12:57:34,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 12:57:34,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 12:57:34,838 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 12:57:34,838 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 12:57:34,839 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 12:57:34,839 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 12:57:35,037 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 12:57:35,037 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 12:57:35,038 INFO L202 PluginConnector]: Adding new model three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:57:35 BoogieIcfgContainer [2021-08-21 12:57:35,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 12:57:35,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 12:57:35,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 12:57:35,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 12:57:35,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 12:57:34" (1/2) ... [2021-08-21 12:57:35,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dccf6d8 and model type three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 12:57:35, skipping insertion in model container [2021-08-21 12:57:35,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 12:57:35" (2/2) ... [2021-08-21 12:57:35,043 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-sum.wvr.bpl [2021-08-21 12:57:35,046 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 12:57:35,046 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 12:57:35,047 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 12:57:35,047 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 12:57:35,073 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 12:57:35,115 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 12:57:35,119 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 12:57:35,120 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 12:57:35,126 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2021-08-21 12:57:35,165 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,167 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 12:57:35,181 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:35,181 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:35,192 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:35,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:35,195 INFO L82 PathProgramCache]: Analyzing trace with hash 510990075, now seen corresponding path program 1 times [2021-08-21 12:57:35,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:35,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921681440] [2021-08-21 12:57:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:35,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:35,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:35,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921681440] [2021-08-21 12:57:35,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921681440] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:57:35,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:57:35,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:57:35,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908123136] [2021-08-21 12:57:35,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:57:35,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:35,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:57:35,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:57:35,404 INFO L87 Difference]: Start difference. First operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:35,425 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2021-08-21 12:57:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:57:35,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 12:57:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:35,435 INFO L225 Difference]: With dead ends: 257 [2021-08-21 12:57:35,435 INFO L226 Difference]: Without dead ends: 230 [2021-08-21 12:57:35,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:57:35,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-08-21 12:57:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2021-08-21 12:57:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2021-08-21 12:57:35,471 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2021-08-21 12:57:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:35,472 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2021-08-21 12:57:35,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2021-08-21 12:57:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:57:35,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:35,474 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:35,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 12:57:35,474 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash 761707259, now seen corresponding path program 1 times [2021-08-21 12:57:35,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:35,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116236638] [2021-08-21 12:57:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:35,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:35,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:35,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116236638] [2021-08-21 12:57:35,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116236638] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:57:35,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:57:35,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:57:35,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095987208] [2021-08-21 12:57:35,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:57:35,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:57:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:57:35,522 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:35,571 INFO L93 Difference]: Finished difference Result 355 states and 1087 transitions. [2021-08-21 12:57:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:57:35,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:57:35,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:35,575 INFO L225 Difference]: With dead ends: 355 [2021-08-21 12:57:35,575 INFO L226 Difference]: Without dead ends: 355 [2021-08-21 12:57:35,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:57:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-08-21 12:57:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 213. [2021-08-21 12:57:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 3.1792452830188678) internal successors, (674), 212 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 674 transitions. [2021-08-21 12:57:35,591 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 674 transitions. Word has length 18 [2021-08-21 12:57:35,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:35,591 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 674 transitions. [2021-08-21 12:57:35,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,591 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 674 transitions. [2021-08-21 12:57:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:57:35,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:35,593 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:35,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 12:57:35,593 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:35,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:35,594 INFO L82 PathProgramCache]: Analyzing trace with hash 988928639, now seen corresponding path program 2 times [2021-08-21 12:57:35,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:35,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603654289] [2021-08-21 12:57:35,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:35,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:35,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:35,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603654289] [2021-08-21 12:57:35,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603654289] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:57:35,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:57:35,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 12:57:35,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260545321] [2021-08-21 12:57:35,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 12:57:35,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:35,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 12:57:35,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:57:35,631 INFO L87 Difference]: Start difference. First operand 213 states and 674 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:35,667 INFO L93 Difference]: Finished difference Result 450 states and 1348 transitions. [2021-08-21 12:57:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:57:35,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:57:35,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:35,670 INFO L225 Difference]: With dead ends: 450 [2021-08-21 12:57:35,670 INFO L226 Difference]: Without dead ends: 450 [2021-08-21 12:57:35,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:57:35,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-08-21 12:57:35,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2021-08-21 12:57:35,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 3.1837606837606836) internal successors, (745), 234 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 745 transitions. [2021-08-21 12:57:35,683 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 745 transitions. Word has length 18 [2021-08-21 12:57:35,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:35,684 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 745 transitions. [2021-08-21 12:57:35,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 745 transitions. [2021-08-21 12:57:35,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 12:57:35,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:35,685 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:35,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 12:57:35,686 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:35,686 INFO L82 PathProgramCache]: Analyzing trace with hash 901635393, now seen corresponding path program 3 times [2021-08-21 12:57:35,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:35,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243150797] [2021-08-21 12:57:35,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:35,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:35,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:35,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:35,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243150797] [2021-08-21 12:57:35,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243150797] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:57:35,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:57:35,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:57:35,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449575369] [2021-08-21 12:57:35,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:57:35,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:57:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:57:35,728 INFO L87 Difference]: Start difference. First operand 235 states and 745 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:35,762 INFO L93 Difference]: Finished difference Result 349 states and 1037 transitions. [2021-08-21 12:57:35,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 12:57:35,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 12:57:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:35,764 INFO L225 Difference]: With dead ends: 349 [2021-08-21 12:57:35,764 INFO L226 Difference]: Without dead ends: 345 [2021-08-21 12:57:35,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:57:35,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-08-21 12:57:35,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 274. [2021-08-21 12:57:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.128205128205128) internal successors, (854), 273 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 854 transitions. [2021-08-21 12:57:35,773 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 854 transitions. Word has length 18 [2021-08-21 12:57:35,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:35,774 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 854 transitions. [2021-08-21 12:57:35,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,774 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 854 transitions. [2021-08-21 12:57:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:57:35,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:35,775 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:35,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-21 12:57:35,776 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:35,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:35,776 INFO L82 PathProgramCache]: Analyzing trace with hash 938496605, now seen corresponding path program 1 times [2021-08-21 12:57:35,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:35,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844089118] [2021-08-21 12:57:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:35,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:35,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:35,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844089118] [2021-08-21 12:57:35,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844089118] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:57:35,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:57:35,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 12:57:35,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278402482] [2021-08-21 12:57:35,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 12:57:35,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:35,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 12:57:35,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 12:57:35,814 INFO L87 Difference]: Start difference. First operand 274 states and 854 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:35,885 INFO L93 Difference]: Finished difference Result 345 states and 1038 transitions. [2021-08-21 12:57:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 12:57:35,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:57:35,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:35,887 INFO L225 Difference]: With dead ends: 345 [2021-08-21 12:57:35,888 INFO L226 Difference]: Without dead ends: 307 [2021-08-21 12:57:35,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 12:57:35,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-21 12:57:35,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 276. [2021-08-21 12:57:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.036363636363636) internal successors, (835), 275 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 835 transitions. [2021-08-21 12:57:35,898 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 835 transitions. Word has length 19 [2021-08-21 12:57:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:35,898 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 835 transitions. [2021-08-21 12:57:35,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,898 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 835 transitions. [2021-08-21 12:57:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 12:57:35,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:35,900 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:35,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 12:57:35,900 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:35,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1599468323, now seen corresponding path program 2 times [2021-08-21 12:57:35,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:35,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838352610] [2021-08-21 12:57:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:35,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:35,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:35,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838352610] [2021-08-21 12:57:35,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838352610] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 12:57:35,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 12:57:35,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-21 12:57:35,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009488516] [2021-08-21 12:57:35,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 12:57:35,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:35,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 12:57:35,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:57:35,942 INFO L87 Difference]: Start difference. First operand 276 states and 835 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:35,951 INFO L93 Difference]: Finished difference Result 257 states and 747 transitions. [2021-08-21 12:57:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 12:57:35,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 12:57:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:35,953 INFO L225 Difference]: With dead ends: 257 [2021-08-21 12:57:35,953 INFO L226 Difference]: Without dead ends: 241 [2021-08-21 12:57:35,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 12:57:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-21 12:57:35,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2021-08-21 12:57:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.017391304347826) internal successors, (694), 230 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 694 transitions. [2021-08-21 12:57:35,958 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 694 transitions. Word has length 19 [2021-08-21 12:57:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:35,958 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 694 transitions. [2021-08-21 12:57:35,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:35,958 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 694 transitions. [2021-08-21 12:57:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 12:57:35,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:35,959 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] [2021-08-21 12:57:35,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-21 12:57:35,959 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:35,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1736700641, now seen corresponding path program 1 times [2021-08-21 12:57:35,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:35,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871620710] [2021-08-21 12:57:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:35,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:35,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:35,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871620710] [2021-08-21 12:57:35,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871620710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:35,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136440246] [2021-08-21 12:57:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:35,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:35,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:35,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:35,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 12:57:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:36,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:57:36,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:36,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136440246] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:36,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:36,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-08-21 12:57:36,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240280075] [2021-08-21 12:57:36,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:57:36,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:57:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:57:36,102 INFO L87 Difference]: Start difference. First operand 231 states and 694 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:36,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:36,149 INFO L93 Difference]: Finished difference Result 295 states and 908 transitions. [2021-08-21 12:57:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:57:36,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 12:57:36,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:36,151 INFO L225 Difference]: With dead ends: 295 [2021-08-21 12:57:36,151 INFO L226 Difference]: Without dead ends: 295 [2021-08-21 12:57:36,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:57:36,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-08-21 12:57:36,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 203. [2021-08-21 12:57:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2021-08-21 12:57:36,157 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 20 [2021-08-21 12:57:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:36,157 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2021-08-21 12:57:36,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2021-08-21 12:57:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 12:57:36,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:36,158 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:36,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:36,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:36,369 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash 345358593, now seen corresponding path program 1 times [2021-08-21 12:57:36,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:36,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936373961] [2021-08-21 12:57:36,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:36,370 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:36,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:36,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936373961] [2021-08-21 12:57:36,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936373961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:36,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702962344] [2021-08-21 12:57:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:36,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:36,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:36,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:36,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 12:57:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:36,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-21 12:57:36,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:36,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702962344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:36,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:36,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-08-21 12:57:36,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076115294] [2021-08-21 12:57:36,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:57:36,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:36,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:57:36,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:57:36,555 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:36,633 INFO L93 Difference]: Finished difference Result 288 states and 873 transitions. [2021-08-21 12:57:36,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 12:57:36,633 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 12:57:36,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:36,634 INFO L225 Difference]: With dead ends: 288 [2021-08-21 12:57:36,635 INFO L226 Difference]: Without dead ends: 288 [2021-08-21 12:57:36,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:57:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-08-21 12:57:36,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 215. [2021-08-21 12:57:36,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2021-08-21 12:57:36,640 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2021-08-21 12:57:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:36,641 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2021-08-21 12:57:36,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2021-08-21 12:57:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:57:36,643 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:36,643 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, 1, 1] [2021-08-21 12:57:36,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:36,858 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,SelfDestructingSolverStorable7 [2021-08-21 12:57:36,858 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:36,859 INFO L82 PathProgramCache]: Analyzing trace with hash -41937549, now seen corresponding path program 1 times [2021-08-21 12:57:36,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:36,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633634795] [2021-08-21 12:57:36,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:36,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:36,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:36,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633634795] [2021-08-21 12:57:36,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633634795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:36,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065796243] [2021-08-21 12:57:36,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:36,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:36,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:36,942 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:36,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 12:57:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:36,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:57:36,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:37,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-08-21 12:57:37,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-21 12:57:37,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2021-08-21 12:57:37,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:57:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:37,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065796243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:37,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:37,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:57:37,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723971844] [2021-08-21 12:57:37,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:57:37,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:57:37,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:57:37,366 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:37,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:37,448 INFO L93 Difference]: Finished difference Result 476 states and 1460 transitions. [2021-08-21 12:57:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:57:37,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:57:37,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:37,450 INFO L225 Difference]: With dead ends: 476 [2021-08-21 12:57:37,450 INFO L226 Difference]: Without dead ends: 449 [2021-08-21 12:57:37,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:57:37,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-08-21 12:57:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 314. [2021-08-21 12:57:37,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:37,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2021-08-21 12:57:37,458 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2021-08-21 12:57:37,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:37,459 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2021-08-21 12:57:37,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:37,459 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2021-08-21 12:57:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:57:37,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:37,460 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, 1, 1] [2021-08-21 12:57:37,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:37,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:37,676 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:37,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:37,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1347256959, now seen corresponding path program 2 times [2021-08-21 12:57:37,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:37,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392110289] [2021-08-21 12:57:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:37,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:37,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:37,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392110289] [2021-08-21 12:57:37,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392110289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:37,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27614309] [2021-08-21 12:57:37,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:57:37,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:37,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:37,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:37,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 12:57:37,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:57:37,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:37,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:57:37,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:38,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:38,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-21 12:57:38,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 12:57:38,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-08-21 12:57:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:38,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27614309] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:38,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:38,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:57:38,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475137822] [2021-08-21 12:57:38,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:57:38,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:38,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:57:38,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:57:38,228 INFO L87 Difference]: Start difference. First operand 314 states and 962 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) [2021-08-21 12:57:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:38,292 INFO L93 Difference]: Finished difference Result 517 states and 1600 transitions. [2021-08-21 12:57:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:57:38,293 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 23 [2021-08-21 12:57:38,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:38,295 INFO L225 Difference]: With dead ends: 517 [2021-08-21 12:57:38,295 INFO L226 Difference]: Without dead ends: 490 [2021-08-21 12:57:38,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:57:38,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-08-21 12:57:38,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 366. [2021-08-21 12:57:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-08-21 12:57:38,303 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-08-21 12:57:38,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:38,303 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-08-21 12:57:38,303 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) [2021-08-21 12:57:38,303 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-08-21 12:57:38,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 12:57:38,304 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:38,304 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, 1, 1] [2021-08-21 12:57:38,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:38,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:38,520 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:38,521 INFO L82 PathProgramCache]: Analyzing trace with hash 228461667, now seen corresponding path program 3 times [2021-08-21 12:57:38,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:38,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792181359] [2021-08-21 12:57:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:38,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:38,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:38,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792181359] [2021-08-21 12:57:38,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792181359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:38,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623481795] [2021-08-21 12:57:38,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:57:38,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:38,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:38,613 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:38,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 12:57:38,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 12:57:38,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:38,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 12:57:38,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:38,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:38,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-08-21 12:57:38,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-08-21 12:57:39,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-21 12:57:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:39,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623481795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:39,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:39,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-21 12:57:39,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811684148] [2021-08-21 12:57:39,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:57:39,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:39,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:57:39,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:57:39,068 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:39,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:39,147 INFO L93 Difference]: Finished difference Result 572 states and 1775 transitions. [2021-08-21 12:57:39,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 12:57:39,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 12:57:39,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:39,150 INFO L225 Difference]: With dead ends: 572 [2021-08-21 12:57:39,150 INFO L226 Difference]: Without dead ends: 545 [2021-08-21 12:57:39,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:57:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-08-21 12:57:39,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 366. [2021-08-21 12:57:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2021-08-21 12:57:39,158 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2021-08-21 12:57:39,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:39,158 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2021-08-21 12:57:39,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2021-08-21 12:57:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:57:39,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:39,159 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:39,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:39,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 12:57:39,376 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:39,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:39,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1894937297, now seen corresponding path program 4 times [2021-08-21 12:57:39,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:39,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033509054] [2021-08-21 12:57:39,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:39,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:39,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:39,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033509054] [2021-08-21 12:57:39,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033509054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:39,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465179495] [2021-08-21 12:57:39,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:57:39,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:39,417 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:39,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 12:57:39,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:57:39,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:39,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:39,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465179495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:39,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:39,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:57:39,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107127071] [2021-08-21 12:57:39,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:57:39,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:39,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:57:39,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:57:39,658 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:39,740 INFO L93 Difference]: Finished difference Result 886 states and 2662 transitions. [2021-08-21 12:57:39,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:57:39,741 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:57:39,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:39,745 INFO L225 Difference]: With dead ends: 886 [2021-08-21 12:57:39,745 INFO L226 Difference]: Without dead ends: 886 [2021-08-21 12:57:39,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:57:39,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-08-21 12:57:39,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 517. [2021-08-21 12:57:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.203488372093023) internal successors, (1653), 516 states have internal predecessors, (1653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:39,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1653 transitions. [2021-08-21 12:57:39,760 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1653 transitions. Word has length 25 [2021-08-21 12:57:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:39,760 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1653 transitions. [2021-08-21 12:57:39,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1653 transitions. [2021-08-21 12:57:39,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:57:39,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:39,763 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:39,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-21 12:57:39,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:39,977 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:39,977 INFO L82 PathProgramCache]: Analyzing trace with hash -595223613, now seen corresponding path program 5 times [2021-08-21 12:57:39,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:39,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482650145] [2021-08-21 12:57:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:39,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:40,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:40,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482650145] [2021-08-21 12:57:40,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482650145] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:40,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277019107] [2021-08-21 12:57:40,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:57:40,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:40,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:40,013 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:40,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 12:57:40,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:57:40,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:40,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:40,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:40,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277019107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:40,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:40,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-08-21 12:57:40,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223437630] [2021-08-21 12:57:40,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 12:57:40,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 12:57:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-21 12:57:40,290 INFO L87 Difference]: Start difference. First operand 517 states and 1653 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:40,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:40,972 INFO L93 Difference]: Finished difference Result 1033 states and 3239 transitions. [2021-08-21 12:57:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:57:40,973 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:57:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:40,977 INFO L225 Difference]: With dead ends: 1033 [2021-08-21 12:57:40,977 INFO L226 Difference]: Without dead ends: 1033 [2021-08-21 12:57:40,977 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=398, Invalid=1324, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 12:57:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-08-21 12:57:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 646. [2021-08-21 12:57:40,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 3.2496124031007754) internal successors, (2096), 645 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 2096 transitions. [2021-08-21 12:57:40,992 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 2096 transitions. Word has length 25 [2021-08-21 12:57:40,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:40,992 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 2096 transitions. [2021-08-21 12:57:40,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 2096 transitions. [2021-08-21 12:57:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:57:40,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:40,994 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:41,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:41,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:41,209 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:41,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:41,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1959818837, now seen corresponding path program 6 times [2021-08-21 12:57:41,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:41,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240599139] [2021-08-21 12:57:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:41,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:41,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:41,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240599139] [2021-08-21 12:57:41,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240599139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:41,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109922282] [2021-08-21 12:57:41,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:57:41,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:41,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:41,234 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:41,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 12:57:41,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:57:41,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:41,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:57:41,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:41,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109922282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:41,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:41,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-21 12:57:41,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006133315] [2021-08-21 12:57:41,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 12:57:41,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:41,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 12:57:41,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:57:41,493 INFO L87 Difference]: Start difference. First operand 646 states and 2096 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:41,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:41,937 INFO L93 Difference]: Finished difference Result 2177 states and 6995 transitions. [2021-08-21 12:57:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:57:41,937 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:57:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:41,946 INFO L225 Difference]: With dead ends: 2177 [2021-08-21 12:57:41,946 INFO L226 Difference]: Without dead ends: 2151 [2021-08-21 12:57:41,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:57:41,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-08-21 12:57:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1034. [2021-08-21 12:57:41,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 3.478218780251694) internal successors, (3593), 1033 states have internal predecessors, (3593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:41,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3593 transitions. [2021-08-21 12:57:41,974 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3593 transitions. Word has length 25 [2021-08-21 12:57:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:41,974 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 3593 transitions. [2021-08-21 12:57:41,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:41,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3593 transitions. [2021-08-21 12:57:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:57:41,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:41,977 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:41,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:42,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 12:57:42,195 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:42,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:42,196 INFO L82 PathProgramCache]: Analyzing trace with hash -131125633, now seen corresponding path program 7 times [2021-08-21 12:57:42,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:42,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008167988] [2021-08-21 12:57:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:42,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:42,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:42,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008167988] [2021-08-21 12:57:42,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008167988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:42,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232175955] [2021-08-21 12:57:42,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:57:42,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:42,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:42,233 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:42,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 12:57:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:42,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:42,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:42,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232175955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:42,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:42,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:57:42,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194704070] [2021-08-21 12:57:42,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:57:42,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:42,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:57:42,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:57:42,470 INFO L87 Difference]: Start difference. First operand 1034 states and 3593 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:42,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:42,527 INFO L93 Difference]: Finished difference Result 1476 states and 4927 transitions. [2021-08-21 12:57:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:57:42,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:57:42,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:42,533 INFO L225 Difference]: With dead ends: 1476 [2021-08-21 12:57:42,533 INFO L226 Difference]: Without dead ends: 1470 [2021-08-21 12:57:42,534 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:57:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-08-21 12:57:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1051. [2021-08-21 12:57:42,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 3.4647619047619047) internal successors, (3638), 1050 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 3638 transitions. [2021-08-21 12:57:42,557 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 3638 transitions. Word has length 25 [2021-08-21 12:57:42,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:42,557 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 3638 transitions. [2021-08-21 12:57:42,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 3638 transitions. [2021-08-21 12:57:42,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:57:42,559 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:42,559 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:42,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:42,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 12:57:42,776 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:42,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1794697629, now seen corresponding path program 8 times [2021-08-21 12:57:42,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:42,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219621093] [2021-08-21 12:57:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:42,776 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:42,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:42,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219621093] [2021-08-21 12:57:42,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219621093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:42,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016709238] [2021-08-21 12:57:42,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:57:42,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:42,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:42,821 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:42,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 12:57:42,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:57:42,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:42,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:42,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:43,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016709238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:43,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:43,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:57:43,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79451033] [2021-08-21 12:57:43,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:57:43,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:43,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:57:43,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:57:43,054 INFO L87 Difference]: Start difference. First operand 1051 states and 3638 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:43,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:43,152 INFO L93 Difference]: Finished difference Result 1980 states and 6727 transitions. [2021-08-21 12:57:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:57:43,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:57:43,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:43,161 INFO L225 Difference]: With dead ends: 1980 [2021-08-21 12:57:43,161 INFO L226 Difference]: Without dead ends: 1968 [2021-08-21 12:57:43,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:57:43,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-08-21 12:57:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1297. [2021-08-21 12:57:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.580246913580247) internal successors, (4640), 1296 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4640 transitions. [2021-08-21 12:57:43,196 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4640 transitions. Word has length 25 [2021-08-21 12:57:43,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:43,197 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 4640 transitions. [2021-08-21 12:57:43,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:43,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4640 transitions. [2021-08-21 12:57:43,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:57:43,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:43,200 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:43,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-21 12:57:43,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 12:57:43,413 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash -675454435, now seen corresponding path program 9 times [2021-08-21 12:57:43,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:43,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230825098] [2021-08-21 12:57:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:43,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:43,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:43,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230825098] [2021-08-21 12:57:43,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230825098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:43,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930116721] [2021-08-21 12:57:43,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:57:43,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:43,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:43,452 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:43,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 12:57:43,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:57:43,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:43,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:43,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:43,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930116721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:43,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:43,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 12:57:43,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467484388] [2021-08-21 12:57:43,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:57:43,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:43,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:57:43,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:57:43,682 INFO L87 Difference]: Start difference. First operand 1297 states and 4640 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:43,777 INFO L93 Difference]: Finished difference Result 2951 states and 10415 transitions. [2021-08-21 12:57:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:57:43,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 12:57:43,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:43,789 INFO L225 Difference]: With dead ends: 2951 [2021-08-21 12:57:43,789 INFO L226 Difference]: Without dead ends: 2945 [2021-08-21 12:57:43,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:57:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-08-21 12:57:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 2000. [2021-08-21 12:57:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 3.773886943471736) internal successors, (7544), 1999 states have internal predecessors, (7544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 7544 transitions. [2021-08-21 12:57:43,835 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 7544 transitions. Word has length 25 [2021-08-21 12:57:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:43,835 INFO L470 AbstractCegarLoop]: Abstraction has 2000 states and 7544 transitions. [2021-08-21 12:57:43,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:43,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 7544 transitions. [2021-08-21 12:57:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 12:57:43,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:43,839 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:43,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:44,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 12:57:44,053 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1549423517, now seen corresponding path program 10 times [2021-08-21 12:57:44,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:44,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227218719] [2021-08-21 12:57:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:44,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:44,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:44,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227218719] [2021-08-21 12:57:44,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227218719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:44,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679205642] [2021-08-21 12:57:44,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:57:44,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:44,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:44,081 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:44,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 12:57:44,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:57:44,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:44,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:44,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679205642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:44,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:44,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:57:44,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857337701] [2021-08-21 12:57:44,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:57:44,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:44,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:57:44,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:57:44,324 INFO L87 Difference]: Start difference. First operand 2000 states and 7544 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:44,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:44,385 INFO L93 Difference]: Finished difference Result 2777 states and 9915 transitions. [2021-08-21 12:57:44,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:57:44,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 25 [2021-08-21 12:57:44,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:44,392 INFO L225 Difference]: With dead ends: 2777 [2021-08-21 12:57:44,393 INFO L226 Difference]: Without dead ends: 2759 [2021-08-21 12:57:44,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:57:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-08-21 12:57:44,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 1995. [2021-08-21 12:57:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 3.7703109327983952) internal successors, (7518), 1994 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 7518 transitions. [2021-08-21 12:57:44,435 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 7518 transitions. Word has length 25 [2021-08-21 12:57:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:44,436 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 7518 transitions. [2021-08-21 12:57:44,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 7518 transitions. [2021-08-21 12:57:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 12:57:44,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:44,440 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:44,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:44,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 12:57:44,653 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:44,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:44,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1017584555, now seen corresponding path program 11 times [2021-08-21 12:57:44,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:44,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116950] [2021-08-21 12:57:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:44,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:44,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:44,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116950] [2021-08-21 12:57:44,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:44,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194063139] [2021-08-21 12:57:44,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:57:44,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:44,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:44,682 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:44,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 12:57:44,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:57:44,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:44,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 12:57:44,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:44,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194063139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:44,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:44,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-21 12:57:44,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302791875] [2021-08-21 12:57:44,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:57:44,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:44,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:57:44,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:57:44,954 INFO L87 Difference]: Start difference. First operand 1995 states and 7518 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:45,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:45,262 INFO L93 Difference]: Finished difference Result 4088 states and 14079 transitions. [2021-08-21 12:57:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 12:57:45,262 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 12:57:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:45,271 INFO L225 Difference]: With dead ends: 4088 [2021-08-21 12:57:45,271 INFO L226 Difference]: Without dead ends: 3536 [2021-08-21 12:57:45,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:57:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-08-21 12:57:45,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2540. [2021-08-21 12:57:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 3.588814493895234) internal successors, (9112), 2539 states have internal predecessors, (9112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 9112 transitions. [2021-08-21 12:57:45,335 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 9112 transitions. Word has length 26 [2021-08-21 12:57:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:45,335 INFO L470 AbstractCegarLoop]: Abstraction has 2540 states and 9112 transitions. [2021-08-21 12:57:45,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 9112 transitions. [2021-08-21 12:57:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:57:45,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:45,340 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:45,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:45,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:45,553 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:45,553 INFO L82 PathProgramCache]: Analyzing trace with hash 226713273, now seen corresponding path program 12 times [2021-08-21 12:57:45,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:45,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653832897] [2021-08-21 12:57:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:45,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:45,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:45,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653832897] [2021-08-21 12:57:45,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653832897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:45,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438802302] [2021-08-21 12:57:45,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:57:45,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:45,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:45,581 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:45,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 12:57:45,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 12:57:45,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:45,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:45,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:45,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:45,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438802302] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:45,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:45,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:57:45,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575066042] [2021-08-21 12:57:45,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:57:45,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:45,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:57:45,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:57:45,873 INFO L87 Difference]: Start difference. First operand 2540 states and 9112 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:45,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:45,949 INFO L93 Difference]: Finished difference Result 5012 states and 17668 transitions. [2021-08-21 12:57:45,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:57:45,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 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 28 [2021-08-21 12:57:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:45,962 INFO L225 Difference]: With dead ends: 5012 [2021-08-21 12:57:45,962 INFO L226 Difference]: Without dead ends: 4982 [2021-08-21 12:57:45,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:57:45,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4982 states. [2021-08-21 12:57:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4982 to 3891. [2021-08-21 12:57:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3890 states have (on average 3.6817480719794347) internal successors, (14322), 3890 states have internal predecessors, (14322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:46,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 14322 transitions. [2021-08-21 12:57:46,058 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 14322 transitions. Word has length 28 [2021-08-21 12:57:46,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:46,058 INFO L470 AbstractCegarLoop]: Abstraction has 3891 states and 14322 transitions. [2021-08-21 12:57:46,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:46,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 14322 transitions. [2021-08-21 12:57:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:57:46,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:46,066 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:46,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:46,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:46,273 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:46,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1762243953, now seen corresponding path program 13 times [2021-08-21 12:57:46,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:46,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447737811] [2021-08-21 12:57:46,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:46,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:46,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:46,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447737811] [2021-08-21 12:57:46,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447737811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:46,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715798065] [2021-08-21 12:57:46,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:57:46,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:46,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:46,304 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:46,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 12:57:46,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:46,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:46,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:46,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715798065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:46,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:46,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-08-21 12:57:46,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464510971] [2021-08-21 12:57:46,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 12:57:46,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:46,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 12:57:46,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:57:46,604 INFO L87 Difference]: Start difference. First operand 3891 states and 14322 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:46,880 INFO L93 Difference]: Finished difference Result 9890 states and 33297 transitions. [2021-08-21 12:57:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:57:46,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 12:57:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:46,907 INFO L225 Difference]: With dead ends: 9890 [2021-08-21 12:57:46,907 INFO L226 Difference]: Without dead ends: 9836 [2021-08-21 12:57:46,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-08-21 12:57:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-08-21 12:57:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 6083. [2021-08-21 12:57:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6083 states, 6082 states have (on average 3.672640578756988) internal successors, (22337), 6082 states have internal predecessors, (22337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6083 states to 6083 states and 22337 transitions. [2021-08-21 12:57:47,122 INFO L78 Accepts]: Start accepts. Automaton has 6083 states and 22337 transitions. Word has length 28 [2021-08-21 12:57:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:47,123 INFO L470 AbstractCegarLoop]: Abstraction has 6083 states and 22337 transitions. [2021-08-21 12:57:47,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:47,124 INFO L276 IsEmpty]: Start isEmpty. Operand 6083 states and 22337 transitions. [2021-08-21 12:57:47,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:57:47,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:47,135 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:47,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:47,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:47,349 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:47,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:47,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2006057489, now seen corresponding path program 14 times [2021-08-21 12:57:47,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:47,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305378015] [2021-08-21 12:57:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:47,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:47,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:47,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305378015] [2021-08-21 12:57:47,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305378015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:47,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276845563] [2021-08-21 12:57:47,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:57:47,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:47,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:47,386 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:47,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 12:57:47,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:57:47,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:47,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:47,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:47,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:47,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276845563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:47,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:47,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-21 12:57:47,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488337027] [2021-08-21 12:57:47,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 12:57:47,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:47,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 12:57:47,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 12:57:47,647 INFO L87 Difference]: Start difference. First operand 6083 states and 22337 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-08-21 12:57:47,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:47,744 INFO L93 Difference]: Finished difference Result 8194 states and 29343 transitions. [2021-08-21 12:57:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 12:57:47,745 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 28 [2021-08-21 12:57:47,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:47,765 INFO L225 Difference]: With dead ends: 8194 [2021-08-21 12:57:47,765 INFO L226 Difference]: Without dead ends: 8152 [2021-08-21 12:57:47,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-21 12:57:47,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8152 states. [2021-08-21 12:57:47,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8152 to 7162. [2021-08-21 12:57:47,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7162 states, 7161 states have (on average 3.697807568775311) internal successors, (26480), 7161 states have internal predecessors, (26480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7162 states to 7162 states and 26480 transitions. [2021-08-21 12:57:47,992 INFO L78 Accepts]: Start accepts. Automaton has 7162 states and 26480 transitions. Word has length 28 [2021-08-21 12:57:47,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:47,992 INFO L470 AbstractCegarLoop]: Abstraction has 7162 states and 26480 transitions. [2021-08-21 12:57:47,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2021-08-21 12:57:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 7162 states and 26480 transitions. [2021-08-21 12:57:48,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 12:57:48,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:48,006 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:48,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:48,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-21 12:57:48,221 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:48,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:48,221 INFO L82 PathProgramCache]: Analyzing trace with hash -753379127, now seen corresponding path program 15 times [2021-08-21 12:57:48,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:48,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700386920] [2021-08-21 12:57:48,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:48,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:48,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:48,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700386920] [2021-08-21 12:57:48,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700386920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:48,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498977190] [2021-08-21 12:57:48,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:57:48,263 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:48,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:48,264 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:48,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 12:57:48,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:57:48,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:48,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 12:57:48,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 12:57:48,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498977190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:48,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:48,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-21 12:57:48,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339479798] [2021-08-21 12:57:48,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:57:48,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:48,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:57:48,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:57:48,566 INFO L87 Difference]: Start difference. First operand 7162 states and 26480 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:48,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:48,902 INFO L93 Difference]: Finished difference Result 11815 states and 40319 transitions. [2021-08-21 12:57:48,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:57:48,903 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 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 28 [2021-08-21 12:57:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:48,933 INFO L225 Difference]: With dead ends: 11815 [2021-08-21 12:57:48,933 INFO L226 Difference]: Without dead ends: 11657 [2021-08-21 12:57:48,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:57:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11657 states. [2021-08-21 12:57:49,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11657 to 9193. [2021-08-21 12:57:49,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9193 states, 9192 states have (on average 3.609769364664926) internal successors, (33181), 9192 states have internal predecessors, (33181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9193 states to 9193 states and 33181 transitions. [2021-08-21 12:57:49,149 INFO L78 Accepts]: Start accepts. Automaton has 9193 states and 33181 transitions. Word has length 28 [2021-08-21 12:57:49,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:49,149 INFO L470 AbstractCegarLoop]: Abstraction has 9193 states and 33181 transitions. [2021-08-21 12:57:49,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:49,149 INFO L276 IsEmpty]: Start isEmpty. Operand 9193 states and 33181 transitions. [2021-08-21 12:57:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:57:49,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:49,201 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:49,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:49,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:49,405 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:49,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:49,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1894836115, now seen corresponding path program 16 times [2021-08-21 12:57:49,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:49,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244608562] [2021-08-21 12:57:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:49,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:49,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:49,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244608562] [2021-08-21 12:57:49,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244608562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:49,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465569523] [2021-08-21 12:57:49,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:57:49,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:49,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:49,709 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:49,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 12:57:49,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:57:49,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:49,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:57:49,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:50,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:50,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2021-08-21 12:57:50,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-08-21 12:57:50,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-08-21 12:57:50,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:57:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:50,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465569523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:50,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:50,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:57:50,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746663016] [2021-08-21 12:57:50,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:57:50,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:50,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:57:50,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:57:50,530 INFO L87 Difference]: Start difference. First operand 9193 states and 33181 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:51,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:51,145 INFO L93 Difference]: Finished difference Result 12370 states and 43818 transitions. [2021-08-21 12:57:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:57:51,146 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:57:51,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:51,177 INFO L225 Difference]: With dead ends: 12370 [2021-08-21 12:57:51,177 INFO L226 Difference]: Without dead ends: 12349 [2021-08-21 12:57:51,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 390.7ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:57:51,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12349 states. [2021-08-21 12:57:51,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12349 to 9264. [2021-08-21 12:57:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9264 states, 9263 states have (on average 3.607794451041779) internal successors, (33419), 9263 states have internal predecessors, (33419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:51,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9264 states to 9264 states and 33419 transitions. [2021-08-21 12:57:51,367 INFO L78 Accepts]: Start accepts. Automaton has 9264 states and 33419 transitions. Word has length 30 [2021-08-21 12:57:51,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:51,367 INFO L470 AbstractCegarLoop]: Abstraction has 9264 states and 33419 transitions. [2021-08-21 12:57:51,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:51,368 INFO L276 IsEmpty]: Start isEmpty. Operand 9264 states and 33419 transitions. [2021-08-21 12:57:51,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:57:51,384 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:51,385 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:51,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:51,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:51,609 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:51,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:51,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1216905027, now seen corresponding path program 17 times [2021-08-21 12:57:51,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:51,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899411634] [2021-08-21 12:57:51,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:51,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:51,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:51,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899411634] [2021-08-21 12:57:51,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899411634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:51,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809144894] [2021-08-21 12:57:51,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:57:51,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:51,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:51,887 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:51,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 12:57:52,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 12:57:52,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:52,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:57:52,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:52,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:57:52,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2021-08-21 12:57:52,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-08-21 12:57:52,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2021-08-21 12:57:52,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-08-21 12:57:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:52,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809144894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:52,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:52,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 12:57:52,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753214326] [2021-08-21 12:57:52,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:57:52,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:52,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:57:52,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:57:52,655 INFO L87 Difference]: Start difference. First operand 9264 states and 33419 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:53,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:53,394 INFO L93 Difference]: Finished difference Result 12495 states and 44217 transitions. [2021-08-21 12:57:53,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:57:53,395 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:57:53,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:53,423 INFO L225 Difference]: With dead ends: 12495 [2021-08-21 12:57:53,423 INFO L226 Difference]: Without dead ends: 12462 [2021-08-21 12:57:53,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 462.0ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-08-21 12:57:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12462 states. [2021-08-21 12:57:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12462 to 9369. [2021-08-21 12:57:53,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9369 states, 9368 states have (on average 3.6041844577284374) internal successors, (33764), 9368 states have internal predecessors, (33764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9369 states to 9369 states and 33764 transitions. [2021-08-21 12:57:53,604 INFO L78 Accepts]: Start accepts. Automaton has 9369 states and 33764 transitions. Word has length 30 [2021-08-21 12:57:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:53,604 INFO L470 AbstractCegarLoop]: Abstraction has 9369 states and 33764 transitions. [2021-08-21 12:57:53,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 9369 states and 33764 transitions. [2021-08-21 12:57:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:57:53,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:53,621 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:53,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:53,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:53,838 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:53,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:53,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1367781517, now seen corresponding path program 18 times [2021-08-21 12:57:53,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:53,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380602105] [2021-08-21 12:57:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:53,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:54,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:54,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380602105] [2021-08-21 12:57:54,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380602105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:54,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345515545] [2021-08-21 12:57:54,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:57:54,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:54,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:54,117 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:54,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 12:57:54,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 12:57:54,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:54,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:57:54,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:54,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:57:54,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2021-08-21 12:57:54,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 12:57:54,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:57:54,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-08-21 12:57:55,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 12:57:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:55,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345515545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:55,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:55,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:57:55,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044844145] [2021-08-21 12:57:55,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:57:55,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:55,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:57:55,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:57:55,077 INFO L87 Difference]: Start difference. First operand 9369 states and 33764 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:55,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:55,571 INFO L93 Difference]: Finished difference Result 12513 states and 44247 transitions. [2021-08-21 12:57:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:57:55,571 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:57:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:55,602 INFO L225 Difference]: With dead ends: 12513 [2021-08-21 12:57:55,603 INFO L226 Difference]: Without dead ends: 12486 [2021-08-21 12:57:55,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-08-21 12:57:55,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12486 states. [2021-08-21 12:57:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12486 to 9387. [2021-08-21 12:57:55,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9387 states, 9386 states have (on average 3.603771574685702) internal successors, (33825), 9386 states have internal predecessors, (33825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:55,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9387 states to 9387 states and 33825 transitions. [2021-08-21 12:57:55,822 INFO L78 Accepts]: Start accepts. Automaton has 9387 states and 33825 transitions. Word has length 30 [2021-08-21 12:57:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:55,822 INFO L470 AbstractCegarLoop]: Abstraction has 9387 states and 33825 transitions. [2021-08-21 12:57:55,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 9387 states and 33825 transitions. [2021-08-21 12:57:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:57:55,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:55,843 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:55,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 12:57:56,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 12:57:56,049 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:56,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:56,049 INFO L82 PathProgramCache]: Analyzing trace with hash 782322175, now seen corresponding path program 19 times [2021-08-21 12:57:56,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:56,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619582832] [2021-08-21 12:57:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:56,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:56,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:56,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619582832] [2021-08-21 12:57:56,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619582832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:56,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184510940] [2021-08-21 12:57:56,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:57:56,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:56,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:56,346 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:56,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 12:57:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:56,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:57:56,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:56,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:57:57,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-08-21 12:57:57,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-08-21 12:57:57,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-08-21 12:57:57,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-08-21 12:57:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:57,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184510940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:57,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:57,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-08-21 12:57:57,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961717002] [2021-08-21 12:57:57,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:57:57,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:57,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:57:57,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:57:57,296 INFO L87 Difference]: Start difference. First operand 9387 states and 33825 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:58,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:57:58,149 INFO L93 Difference]: Finished difference Result 12759 states and 45117 transitions. [2021-08-21 12:57:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:57:58,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:57:58,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:57:58,179 INFO L225 Difference]: With dead ends: 12759 [2021-08-21 12:57:58,179 INFO L226 Difference]: Without dead ends: 12738 [2021-08-21 12:57:58,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 442.2ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:57:58,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12738 states. [2021-08-21 12:57:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12738 to 9414. [2021-08-21 12:57:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9414 states, 9413 states have (on average 3.603527037076384) internal successors, (33920), 9413 states have internal predecessors, (33920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:58,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9414 states to 9414 states and 33920 transitions. [2021-08-21 12:57:58,424 INFO L78 Accepts]: Start accepts. Automaton has 9414 states and 33920 transitions. Word has length 30 [2021-08-21 12:57:58,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:57:58,424 INFO L470 AbstractCegarLoop]: Abstraction has 9414 states and 33920 transitions. [2021-08-21 12:57:58,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:57:58,425 INFO L276 IsEmpty]: Start isEmpty. Operand 9414 states and 33920 transitions. [2021-08-21 12:57:58,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:57:58,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:57:58,438 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:57:58,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-21 12:57:58,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 12:57:58,641 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:57:58,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:57:58,641 INFO L82 PathProgramCache]: Analyzing trace with hash -336473117, now seen corresponding path program 20 times [2021-08-21 12:57:58,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:57:58,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831689532] [2021-08-21 12:57:58,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:57:58,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:57:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:57:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:58,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:57:58,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831689532] [2021-08-21 12:57:58,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831689532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:58,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205751540] [2021-08-21 12:57:58,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:57:58,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:57:58,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:57:58,918 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:57:58,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 12:57:59,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:57:59,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:57:59,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:57:59,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:57:59,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:57:59,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:57:59,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:57:59,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-08-21 12:57:59,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2021-08-21 12:57:59,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-08-21 12:57:59,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 12:57:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:57:59,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205751540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:57:59,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:57:59,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-08-21 12:57:59,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633627233] [2021-08-21 12:57:59,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:57:59,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:57:59,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:57:59,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:57:59,888 INFO L87 Difference]: Start difference. First operand 9414 states and 33920 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:00,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:00,569 INFO L93 Difference]: Finished difference Result 12709 states and 44911 transitions. [2021-08-21 12:58:00,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:58:00,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:00,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:00,605 INFO L225 Difference]: With dead ends: 12709 [2021-08-21 12:58:00,605 INFO L226 Difference]: Without dead ends: 12688 [2021-08-21 12:58:00,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 461.5ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:58:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12688 states. [2021-08-21 12:58:00,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12688 to 9426. [2021-08-21 12:58:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9426 states, 9425 states have (on average 3.6044562334217507) internal successors, (33972), 9425 states have internal predecessors, (33972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9426 states to 9426 states and 33972 transitions. [2021-08-21 12:58:00,803 INFO L78 Accepts]: Start accepts. Automaton has 9426 states and 33972 transitions. Word has length 30 [2021-08-21 12:58:00,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:00,803 INFO L470 AbstractCegarLoop]: Abstraction has 9426 states and 33972 transitions. [2021-08-21 12:58:00,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:00,804 INFO L276 IsEmpty]: Start isEmpty. Operand 9426 states and 33972 transitions. [2021-08-21 12:58:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:00,819 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:00,819 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:00,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 12:58:01,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 12:58:01,019 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:01,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:01,020 INFO L82 PathProgramCache]: Analyzing trace with hash 418455901, now seen corresponding path program 21 times [2021-08-21 12:58:01,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:01,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640559292] [2021-08-21 12:58:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:01,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:01,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:01,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640559292] [2021-08-21 12:58:01,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640559292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:01,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109551265] [2021-08-21 12:58:01,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:58:01,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:01,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:01,269 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:01,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 12:58:01,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:58:01,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:01,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:58:01,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:01,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:58:02,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:58:02,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 63 [2021-08-21 12:58:02,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:58:02,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 72 [2021-08-21 12:58:02,174 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-21 12:58:02,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 73 [2021-08-21 12:58:02,469 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 12:58:02,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 32 [2021-08-21 12:58:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:02,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109551265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:02,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:02,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-08-21 12:58:02,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873081907] [2021-08-21 12:58:02,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:58:02,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:02,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:58:02,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:58:02,534 INFO L87 Difference]: Start difference. First operand 9426 states and 33972 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:04,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:04,121 INFO L93 Difference]: Finished difference Result 13519 states and 47330 transitions. [2021-08-21 12:58:04,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 12:58:04,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:04,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:04,152 INFO L225 Difference]: With dead ends: 13519 [2021-08-21 12:58:04,152 INFO L226 Difference]: Without dead ends: 13473 [2021-08-21 12:58:04,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 951.5ms TimeCoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:58:04,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13473 states. [2021-08-21 12:58:04,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13473 to 9581. [2021-08-21 12:58:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9581 states, 9580 states have (on average 3.603757828810021) internal successors, (34524), 9580 states have internal predecessors, (34524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:04,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 34524 transitions. [2021-08-21 12:58:04,365 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 34524 transitions. Word has length 30 [2021-08-21 12:58:04,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:04,366 INFO L470 AbstractCegarLoop]: Abstraction has 9581 states and 34524 transitions. [2021-08-21 12:58:04,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 34524 transitions. [2021-08-21 12:58:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:04,381 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:04,381 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:04,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:04,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:04,582 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:04,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:04,583 INFO L82 PathProgramCache]: Analyzing trace with hash 2138468893, now seen corresponding path program 22 times [2021-08-21 12:58:04,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:04,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351438803] [2021-08-21 12:58:04,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:04,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:04,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:04,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351438803] [2021-08-21 12:58:04,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351438803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:04,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622470995] [2021-08-21 12:58:04,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:58:04,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:04,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:04,821 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:04,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 12:58:05,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:58:05,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:05,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:58:05,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:05,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:05,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2021-08-21 12:58:05,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-08-21 12:58:05,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2021-08-21 12:58:05,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-08-21 12:58:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:05,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622470995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:05,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:05,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-21 12:58:05,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314288901] [2021-08-21 12:58:05,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 12:58:05,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:05,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 12:58:05,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:58:05,805 INFO L87 Difference]: Start difference. First operand 9581 states and 34524 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:06,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:06,558 INFO L93 Difference]: Finished difference Result 12919 states and 45588 transitions. [2021-08-21 12:58:06,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 12:58:06,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:06,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:06,587 INFO L225 Difference]: With dead ends: 12919 [2021-08-21 12:58:06,587 INFO L226 Difference]: Without dead ends: 12876 [2021-08-21 12:58:06,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:58:06,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12876 states. [2021-08-21 12:58:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12876 to 9654. [2021-08-21 12:58:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9654 states, 9653 states have (on average 3.601678234745675) internal successors, (34767), 9653 states have internal predecessors, (34767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9654 states to 9654 states and 34767 transitions. [2021-08-21 12:58:06,754 INFO L78 Accepts]: Start accepts. Automaton has 9654 states and 34767 transitions. Word has length 30 [2021-08-21 12:58:06,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:06,754 INFO L470 AbstractCegarLoop]: Abstraction has 9654 states and 34767 transitions. [2021-08-21 12:58:06,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:06,754 INFO L276 IsEmpty]: Start isEmpty. Operand 9654 states and 34767 transitions. [2021-08-21 12:58:06,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:06,768 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:06,768 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:06,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:06,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:06,969 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:06,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:06,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1506453511, now seen corresponding path program 23 times [2021-08-21 12:58:06,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:06,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794420647] [2021-08-21 12:58:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:06,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:07,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:07,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794420647] [2021-08-21 12:58:07,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794420647] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:07,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494894405] [2021-08-21 12:58:07,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:58:07,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:07,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:07,179 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:07,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 12:58:07,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:58:07,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:07,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:58:07,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:07,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:58:08,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2021-08-21 12:58:08,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-08-21 12:58:08,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:58:08,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2021-08-21 12:58:08,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 12:58:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:08,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494894405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:08,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:08,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-21 12:58:08,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154696200] [2021-08-21 12:58:08,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:58:08,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:08,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:58:08,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:58:08,270 INFO L87 Difference]: Start difference. First operand 9654 states and 34767 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:08,888 INFO L93 Difference]: Finished difference Result 13930 states and 49032 transitions. [2021-08-21 12:58:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 12:58:08,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:08,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:08,919 INFO L225 Difference]: With dead ends: 13930 [2021-08-21 12:58:08,919 INFO L226 Difference]: Without dead ends: 13903 [2021-08-21 12:58:08,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-08-21 12:58:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13903 states. [2021-08-21 12:58:09,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13903 to 9629. [2021-08-21 12:58:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9629 states, 9628 states have (on average 3.6018903199002907) internal successors, (34679), 9628 states have internal predecessors, (34679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9629 states to 9629 states and 34679 transitions. [2021-08-21 12:58:09,097 INFO L78 Accepts]: Start accepts. Automaton has 9629 states and 34679 transitions. Word has length 30 [2021-08-21 12:58:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:09,097 INFO L470 AbstractCegarLoop]: Abstraction has 9629 states and 34679 transitions. [2021-08-21 12:58:09,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:09,097 INFO L276 IsEmpty]: Start isEmpty. Operand 9629 states and 34679 transitions. [2021-08-21 12:58:09,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:09,112 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:09,112 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:09,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:09,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-21 12:58:09,318 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:09,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:09,318 INFO L82 PathProgramCache]: Analyzing trace with hash -586467713, now seen corresponding path program 24 times [2021-08-21 12:58:09,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:09,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700923419] [2021-08-21 12:58:09,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:09,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:09,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:09,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700923419] [2021-08-21 12:58:09,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700923419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:09,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741550541] [2021-08-21 12:58:09,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:58:09,620 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:09,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:09,621 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:09,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 12:58:10,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 12:58:10,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:10,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:58:10,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:10,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:10,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-08-21 12:58:10,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-08-21 12:58:10,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-08-21 12:58:10,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-21 12:58:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:10,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741550541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:10,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:10,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-08-21 12:58:10,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929445309] [2021-08-21 12:58:10,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:58:10,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:10,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:58:10,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:58:10,809 INFO L87 Difference]: Start difference. First operand 9629 states and 34679 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:11,779 INFO L93 Difference]: Finished difference Result 13350 states and 47128 transitions. [2021-08-21 12:58:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:58:11,780 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:11,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:11,809 INFO L225 Difference]: With dead ends: 13350 [2021-08-21 12:58:11,809 INFO L226 Difference]: Without dead ends: 13311 [2021-08-21 12:58:11,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 520.6ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:58:11,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13311 states. [2021-08-21 12:58:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13311 to 9698. [2021-08-21 12:58:11,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9698 states, 9697 states have (on average 3.599463751675776) internal successors, (34904), 9697 states have internal predecessors, (34904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9698 states to 9698 states and 34904 transitions. [2021-08-21 12:58:11,979 INFO L78 Accepts]: Start accepts. Automaton has 9698 states and 34904 transitions. Word has length 30 [2021-08-21 12:58:11,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:11,980 INFO L470 AbstractCegarLoop]: Abstraction has 9698 states and 34904 transitions. [2021-08-21 12:58:11,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:11,980 INFO L276 IsEmpty]: Start isEmpty. Operand 9698 states and 34904 transitions. [2021-08-21 12:58:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:11,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:11,995 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:12,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:12,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-21 12:58:12,209 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:12,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:12,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1705263005, now seen corresponding path program 25 times [2021-08-21 12:58:12,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:12,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483230218] [2021-08-21 12:58:12,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:12,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:12,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:12,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483230218] [2021-08-21 12:58:12,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483230218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:12,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5426014] [2021-08-21 12:58:12,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:58:12,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:12,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:12,511 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:12,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 12:58:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:13,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:58:13,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:13,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:13,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:13,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:58:13,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-08-21 12:58:13,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-21 12:58:13,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 12:58:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:13,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5426014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:13,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:13,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-08-21 12:58:13,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246610297] [2021-08-21 12:58:13,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:58:13,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:13,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:58:13,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:58:13,702 INFO L87 Difference]: Start difference. First operand 9698 states and 34904 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:14,609 INFO L93 Difference]: Finished difference Result 13176 states and 46517 transitions. [2021-08-21 12:58:14,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 12:58:14,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:14,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:14,640 INFO L225 Difference]: With dead ends: 13176 [2021-08-21 12:58:14,640 INFO L226 Difference]: Without dead ends: 13137 [2021-08-21 12:58:14,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-08-21 12:58:14,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13137 states. [2021-08-21 12:58:14,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13137 to 9693. [2021-08-21 12:58:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9693 states, 9692 states have (on average 3.6015270326042095) internal successors, (34906), 9692 states have internal predecessors, (34906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9693 states to 9693 states and 34906 transitions. [2021-08-21 12:58:14,812 INFO L78 Accepts]: Start accepts. Automaton has 9693 states and 34906 transitions. Word has length 30 [2021-08-21 12:58:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:14,812 INFO L470 AbstractCegarLoop]: Abstraction has 9693 states and 34906 transitions. [2021-08-21 12:58:14,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 9693 states and 34906 transitions. [2021-08-21 12:58:14,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:14,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:14,827 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:14,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 12:58:15,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:15,028 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash 639992413, now seen corresponding path program 26 times [2021-08-21 12:58:15,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:15,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554094312] [2021-08-21 12:58:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:15,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:15,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:15,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554094312] [2021-08-21 12:58:15,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554094312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:15,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27131276] [2021-08-21 12:58:15,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:58:15,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:15,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:15,397 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:15,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 12:58:16,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:58:16,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:16,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:58:16,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:16,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:16,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:16,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:58:16,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-08-21 12:58:16,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-21 12:58:16,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-08-21 12:58:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:16,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27131276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:16,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:16,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2021-08-21 12:58:16,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547487069] [2021-08-21 12:58:16,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:58:16,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:16,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:58:16,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:58:16,555 INFO L87 Difference]: Start difference. First operand 9693 states and 34906 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:17,261 INFO L93 Difference]: Finished difference Result 12936 states and 45740 transitions. [2021-08-21 12:58:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 12:58:17,262 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:17,291 INFO L225 Difference]: With dead ends: 12936 [2021-08-21 12:58:17,291 INFO L226 Difference]: Without dead ends: 12897 [2021-08-21 12:58:17,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 461.6ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-08-21 12:58:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12897 states. [2021-08-21 12:58:17,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12897 to 9700. [2021-08-21 12:58:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9700 states, 9699 states have (on average 3.602536343952985) internal successors, (34941), 9699 states have internal predecessors, (34941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9700 states to 9700 states and 34941 transitions. [2021-08-21 12:58:17,506 INFO L78 Accepts]: Start accepts. Automaton has 9700 states and 34941 transitions. Word has length 30 [2021-08-21 12:58:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:17,506 INFO L470 AbstractCegarLoop]: Abstraction has 9700 states and 34941 transitions. [2021-08-21 12:58:17,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 9700 states and 34941 transitions. [2021-08-21 12:58:17,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:17,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:17,521 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:17,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:17,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:17,723 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:17,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:17,723 INFO L82 PathProgramCache]: Analyzing trace with hash -35543505, now seen corresponding path program 27 times [2021-08-21 12:58:17,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:17,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634451962] [2021-08-21 12:58:17,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:17,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:17,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:17,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634451962] [2021-08-21 12:58:17,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634451962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:17,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453018696] [2021-08-21 12:58:17,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:58:17,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:17,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:17,920 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:17,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 12:58:18,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:58:18,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:18,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 12:58:18,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:18,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:19,211 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 12:58:19,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 50 [2021-08-21 12:58:19,218 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 12:58:19,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 36 [2021-08-21 12:58:19,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-08-21 12:58:19,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:58:19,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-08-21 12:58:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:19,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453018696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:19,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:19,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-21 12:58:19,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522660623] [2021-08-21 12:58:19,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:58:19,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:19,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:58:19,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:58:19,511 INFO L87 Difference]: Start difference. First operand 9700 states and 34941 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:21,102 INFO L93 Difference]: Finished difference Result 12748 states and 43758 transitions. [2021-08-21 12:58:21,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 12:58:21,103 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:21,134 INFO L225 Difference]: With dead ends: 12748 [2021-08-21 12:58:21,134 INFO L226 Difference]: Without dead ends: 12676 [2021-08-21 12:58:21,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 940.7ms TimeCoverageRelationStatistics Valid=230, Invalid=1576, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 12:58:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12676 states. [2021-08-21 12:58:21,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12676 to 9745. [2021-08-21 12:58:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9745 states, 9744 states have (on average 3.6026272577996714) internal successors, (35104), 9744 states have internal predecessors, (35104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9745 states to 9745 states and 35104 transitions. [2021-08-21 12:58:21,316 INFO L78 Accepts]: Start accepts. Automaton has 9745 states and 35104 transitions. Word has length 30 [2021-08-21 12:58:21,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:21,316 INFO L470 AbstractCegarLoop]: Abstraction has 9745 states and 35104 transitions. [2021-08-21 12:58:21,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 9745 states and 35104 transitions. [2021-08-21 12:58:21,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:21,330 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:21,330 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:21,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:21,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:21,531 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:21,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:21,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1499987175, now seen corresponding path program 28 times [2021-08-21 12:58:21,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:21,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114958268] [2021-08-21 12:58:21,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:21,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:21,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:21,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114958268] [2021-08-21 12:58:21,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114958268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:21,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516424673] [2021-08-21 12:58:21,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:58:21,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:21,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:21,732 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:21,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 12:58:22,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:58:22,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:22,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:58:22,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:22,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:22,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2021-08-21 12:58:22,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-08-21 12:58:22,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-08-21 12:58:22,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:58:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:22,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516424673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:22,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:22,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:58:22,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439978796] [2021-08-21 12:58:22,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:58:22,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:22,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:58:22,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:58:22,987 INFO L87 Difference]: Start difference. First operand 9745 states and 35104 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:24,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:24,274 INFO L93 Difference]: Finished difference Result 15810 states and 56110 transitions. [2021-08-21 12:58:24,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 12:58:24,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:24,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:24,309 INFO L225 Difference]: With dead ends: 15810 [2021-08-21 12:58:24,310 INFO L226 Difference]: Without dead ends: 15789 [2021-08-21 12:58:24,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 917.8ms TimeCoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 12:58:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15789 states. [2021-08-21 12:58:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15789 to 9784. [2021-08-21 12:58:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9784 states, 9783 states have (on average 3.6043136052335685) internal successors, (35261), 9783 states have internal predecessors, (35261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:24,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9784 states to 9784 states and 35261 transitions. [2021-08-21 12:58:24,500 INFO L78 Accepts]: Start accepts. Automaton has 9784 states and 35261 transitions. Word has length 30 [2021-08-21 12:58:24,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:24,500 INFO L470 AbstractCegarLoop]: Abstraction has 9784 states and 35261 transitions. [2021-08-21 12:58:24,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:24,500 INFO L276 IsEmpty]: Start isEmpty. Operand 9784 states and 35261 transitions. [2021-08-21 12:58:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:24,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:24,515 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:24,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:24,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 12:58:24,719 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:24,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2114560187, now seen corresponding path program 29 times [2021-08-21 12:58:24,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:24,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652059908] [2021-08-21 12:58:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:24,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:24,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:24,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652059908] [2021-08-21 12:58:24,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652059908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:24,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709297057] [2021-08-21 12:58:24,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:58:24,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:24,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:24,953 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:24,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 12:58:25,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:58:25,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:25,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 12:58:25,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:25,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:26,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:58:26,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:26,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-08-21 12:58:26,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:26,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-08-21 12:58:26,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-08-21 12:58:26,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-08-21 12:58:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:26,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709297057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:26,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:26,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 12:58:26,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087681433] [2021-08-21 12:58:26,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:58:26,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:26,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:58:26,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:58:26,447 INFO L87 Difference]: Start difference. First operand 9784 states and 35261 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:27,445 INFO L93 Difference]: Finished difference Result 15202 states and 54235 transitions. [2021-08-21 12:58:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:58:27,446 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:27,489 INFO L225 Difference]: With dead ends: 15202 [2021-08-21 12:58:27,489 INFO L226 Difference]: Without dead ends: 15151 [2021-08-21 12:58:27,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 768.2ms TimeCoverageRelationStatistics Valid=261, Invalid=929, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:58:27,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15151 states. [2021-08-21 12:58:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15151 to 9862. [2021-08-21 12:58:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9862 states, 9861 states have (on average 3.5999391542439914) internal successors, (35499), 9861 states have internal predecessors, (35499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9862 states to 9862 states and 35499 transitions. [2021-08-21 12:58:27,711 INFO L78 Accepts]: Start accepts. Automaton has 9862 states and 35499 transitions. Word has length 30 [2021-08-21 12:58:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:27,711 INFO L470 AbstractCegarLoop]: Abstraction has 9862 states and 35499 transitions. [2021-08-21 12:58:27,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 9862 states and 35499 transitions. [2021-08-21 12:58:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:27,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:27,726 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:27,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:27,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 12:58:27,941 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:27,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash 995764895, now seen corresponding path program 30 times [2021-08-21 12:58:27,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:27,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711638193] [2021-08-21 12:58:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:27,942 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:28,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:28,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:28,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711638193] [2021-08-21 12:58:28,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711638193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:28,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997602416] [2021-08-21 12:58:28,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:58:28,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:28,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:28,157 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:28,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 12:58:28,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:58:28,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:28,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:58:28,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:29,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:29,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:58:29,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:29,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-08-21 12:58:29,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-21 12:58:29,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-21 12:58:29,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 12:58:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:29,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997602416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:29,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:29,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:58:29,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432806337] [2021-08-21 12:58:29,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:58:29,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:29,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:58:29,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:58:29,535 INFO L87 Difference]: Start difference. First operand 9862 states and 35499 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:30,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:30,415 INFO L93 Difference]: Finished difference Result 15337 states and 54556 transitions. [2021-08-21 12:58:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 12:58:30,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:30,457 INFO L225 Difference]: With dead ends: 15337 [2021-08-21 12:58:30,457 INFO L226 Difference]: Without dead ends: 15310 [2021-08-21 12:58:30,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 607.4ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-08-21 12:58:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15310 states. [2021-08-21 12:58:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15310 to 9860. [2021-08-21 12:58:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9860 states, 9859 states have (on average 3.6010751597525106) internal successors, (35503), 9859 states have internal predecessors, (35503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9860 states to 9860 states and 35503 transitions. [2021-08-21 12:58:30,646 INFO L78 Accepts]: Start accepts. Automaton has 9860 states and 35503 transitions. Word has length 30 [2021-08-21 12:58:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:30,646 INFO L470 AbstractCegarLoop]: Abstraction has 9860 states and 35503 transitions. [2021-08-21 12:58:30,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 9860 states and 35503 transitions. [2021-08-21 12:58:30,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:30,660 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:30,661 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:30,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:30,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 12:58:30,861 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:30,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:30,861 INFO L82 PathProgramCache]: Analyzing trace with hash -382774213, now seen corresponding path program 31 times [2021-08-21 12:58:30,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:30,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459088603] [2021-08-21 12:58:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:30,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:31,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:31,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459088603] [2021-08-21 12:58:31,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459088603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:31,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914334628] [2021-08-21 12:58:31,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:58:31,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:31,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:31,091 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:31,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 12:58:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:31,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:58:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:32,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:58:32,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:32,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-08-21 12:58:32,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:32,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 34 [2021-08-21 12:58:32,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-08-21 12:58:32,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-08-21 12:58:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:32,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914334628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:32,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:32,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:58:32,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340666469] [2021-08-21 12:58:32,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:58:32,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:32,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:58:32,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:58:32,605 INFO L87 Difference]: Start difference. First operand 9860 states and 35503 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:33,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:33,696 INFO L93 Difference]: Finished difference Result 15717 states and 55928 transitions. [2021-08-21 12:58:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:58:33,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:33,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:33,737 INFO L225 Difference]: With dead ends: 15717 [2021-08-21 12:58:33,737 INFO L226 Difference]: Without dead ends: 15696 [2021-08-21 12:58:33,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 847.0ms TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:58:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15696 states. [2021-08-21 12:58:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15696 to 9936. [2021-08-21 12:58:33,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9936 states, 9935 states have (on average 3.5978862606945143) internal successors, (35745), 9935 states have internal predecessors, (35745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9936 states to 9936 states and 35745 transitions. [2021-08-21 12:58:33,944 INFO L78 Accepts]: Start accepts. Automaton has 9936 states and 35745 transitions. Word has length 30 [2021-08-21 12:58:33,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:33,944 INFO L470 AbstractCegarLoop]: Abstraction has 9936 states and 35745 transitions. [2021-08-21 12:58:33,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 9936 states and 35745 transitions. [2021-08-21 12:58:33,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:33,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:33,961 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:33,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 12:58:34,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 12:58:34,161 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:34,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:34,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1803225825, now seen corresponding path program 32 times [2021-08-21 12:58:34,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:34,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481801242] [2021-08-21 12:58:34,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:34,162 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:34,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:34,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481801242] [2021-08-21 12:58:34,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481801242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:34,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625963880] [2021-08-21 12:58:34,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:58:34,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:34,374 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:34,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 12:58:35,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:58:35,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:35,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:58:35,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:35,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:58:35,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:35,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 37 [2021-08-21 12:58:35,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:35,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-08-21 12:58:35,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-08-21 12:58:35,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-08-21 12:58:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:35,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625963880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:35,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:35,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:58:35,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043653932] [2021-08-21 12:58:35,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:58:35,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:35,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:58:35,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:58:35,897 INFO L87 Difference]: Start difference. First operand 9936 states and 35745 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:36,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:36,875 INFO L93 Difference]: Finished difference Result 15460 states and 55078 transitions. [2021-08-21 12:58:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 12:58:36,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:36,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:36,916 INFO L225 Difference]: With dead ends: 15460 [2021-08-21 12:58:36,916 INFO L226 Difference]: Without dead ends: 15409 [2021-08-21 12:58:36,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 683.8ms TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2021-08-21 12:58:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15409 states. [2021-08-21 12:58:37,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15409 to 9983. [2021-08-21 12:58:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9983 states, 9982 states have (on average 3.595972750951713) internal successors, (35895), 9982 states have internal predecessors, (35895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:37,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9983 states to 9983 states and 35895 transitions. [2021-08-21 12:58:37,132 INFO L78 Accepts]: Start accepts. Automaton has 9983 states and 35895 transitions. Word has length 30 [2021-08-21 12:58:37,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:37,132 INFO L470 AbstractCegarLoop]: Abstraction has 9983 states and 35895 transitions. [2021-08-21 12:58:37,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:37,132 INFO L276 IsEmpty]: Start isEmpty. Operand 9983 states and 35895 transitions. [2021-08-21 12:58:37,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:37,147 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:37,147 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:37,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:37,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 12:58:37,347 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:37,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:37,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1471923427, now seen corresponding path program 33 times [2021-08-21 12:58:37,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:37,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252484296] [2021-08-21 12:58:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:37,348 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:37,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:37,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252484296] [2021-08-21 12:58:37,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252484296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:37,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309585104] [2021-08-21 12:58:37,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:58:37,549 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:37,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:37,550 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:37,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 12:58:38,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:58:38,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:38,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 12:58:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:38,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:58:38,803 INFO L354 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2021-08-21 12:58:38,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2021-08-21 12:58:39,227 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 12:58:39,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 47 [2021-08-21 12:58:39,252 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 12:58:39,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 33 [2021-08-21 12:58:39,317 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-08-21 12:58:39,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2021-08-21 12:58:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:39,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309585104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:39,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:39,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-21 12:58:39,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007531350] [2021-08-21 12:58:39,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:58:39,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:39,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:58:39,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:58:39,483 INFO L87 Difference]: Start difference. First operand 9983 states and 35895 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:42,351 INFO L93 Difference]: Finished difference Result 15341 states and 54586 transitions. [2021-08-21 12:58:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 12:58:42,351 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:42,389 INFO L225 Difference]: With dead ends: 15341 [2021-08-21 12:58:42,389 INFO L226 Difference]: Without dead ends: 15305 [2021-08-21 12:58:42,390 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 1978.1ms TimeCoverageRelationStatistics Valid=326, Invalid=2026, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 12:58:42,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15305 states. [2021-08-21 12:58:42,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15305 to 10011. [2021-08-21 12:58:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10011 states, 10010 states have (on average 3.595304695304695) internal successors, (35989), 10010 states have internal predecessors, (35989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10011 states to 10011 states and 35989 transitions. [2021-08-21 12:58:42,617 INFO L78 Accepts]: Start accepts. Automaton has 10011 states and 35989 transitions. Word has length 30 [2021-08-21 12:58:42,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:42,617 INFO L470 AbstractCegarLoop]: Abstraction has 10011 states and 35989 transitions. [2021-08-21 12:58:42,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:42,617 INFO L276 IsEmpty]: Start isEmpty. Operand 10011 states and 35989 transitions. [2021-08-21 12:58:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:42,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:42,632 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:42,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 12:58:42,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:42,833 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:42,833 INFO L82 PathProgramCache]: Analyzing trace with hash -863874717, now seen corresponding path program 34 times [2021-08-21 12:58:42,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:42,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623176642] [2021-08-21 12:58:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:42,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:42,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:43,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:43,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623176642] [2021-08-21 12:58:43,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623176642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:43,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841217226] [2021-08-21 12:58:43,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:58:43,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:43,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:43,057 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:43,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 12:58:44,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:58:44,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:44,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:58:44,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:44,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:44,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:58:44,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-08-21 12:58:44,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-08-21 12:58:44,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-08-21 12:58:44,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-21 12:58:44,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:44,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841217226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:44,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:44,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:58:44,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932081523] [2021-08-21 12:58:44,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:58:44,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:44,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:58:44,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:58:44,616 INFO L87 Difference]: Start difference. First operand 10011 states and 35989 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:45,552 INFO L93 Difference]: Finished difference Result 17873 states and 63641 transitions. [2021-08-21 12:58:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 12:58:45,554 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:45,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:45,596 INFO L225 Difference]: With dead ends: 17873 [2021-08-21 12:58:45,596 INFO L226 Difference]: Without dead ends: 17846 [2021-08-21 12:58:45,596 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 630.5ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 12:58:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17846 states. [2021-08-21 12:58:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17846 to 10030. [2021-08-21 12:58:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10030 states, 10029 states have (on average 3.5957722604447104) internal successors, (36062), 10029 states have internal predecessors, (36062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:45,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10030 states to 10030 states and 36062 transitions. [2021-08-21 12:58:45,801 INFO L78 Accepts]: Start accepts. Automaton has 10030 states and 36062 transitions. Word has length 30 [2021-08-21 12:58:45,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:45,801 INFO L470 AbstractCegarLoop]: Abstraction has 10030 states and 36062 transitions. [2021-08-21 12:58:45,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:45,802 INFO L276 IsEmpty]: Start isEmpty. Operand 10030 states and 36062 transitions. [2021-08-21 12:58:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:45,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:45,817 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:45,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-21 12:58:46,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:46,019 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:46,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:46,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1448303207, now seen corresponding path program 35 times [2021-08-21 12:58:46,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:46,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439839123] [2021-08-21 12:58:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:46,020 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:46,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:46,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439839123] [2021-08-21 12:58:46,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439839123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:46,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552252293] [2021-08-21 12:58:46,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:58:46,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:46,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:46,195 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:46,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 12:58:47,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 12:58:47,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:47,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:58:47,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:47,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:58:47,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2021-08-21 12:58:47,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-08-21 12:58:47,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-08-21 12:58:47,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-21 12:58:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:47,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552252293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:47,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:47,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:58:47,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064795041] [2021-08-21 12:58:47,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:58:47,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:47,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:58:47,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:58:47,802 INFO L87 Difference]: Start difference. First operand 10030 states and 36062 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:48,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:48,726 INFO L93 Difference]: Finished difference Result 13610 states and 46591 transitions. [2021-08-21 12:58:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:58:48,727 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:48,757 INFO L225 Difference]: With dead ends: 13610 [2021-08-21 12:58:48,757 INFO L226 Difference]: Without dead ends: 13574 [2021-08-21 12:58:48,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 567.0ms TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 12:58:48,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13574 states. [2021-08-21 12:58:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13574 to 10072. [2021-08-21 12:58:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10072 states, 10071 states have (on average 3.5973587528547313) internal successors, (36229), 10071 states have internal predecessors, (36229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10072 states to 10072 states and 36229 transitions. [2021-08-21 12:58:48,934 INFO L78 Accepts]: Start accepts. Automaton has 10072 states and 36229 transitions. Word has length 30 [2021-08-21 12:58:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:48,934 INFO L470 AbstractCegarLoop]: Abstraction has 10072 states and 36229 transitions. [2021-08-21 12:58:48,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:48,934 INFO L276 IsEmpty]: Start isEmpty. Operand 10072 states and 36229 transitions. [2021-08-21 12:58:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:48,949 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:48,949 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:48,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 12:58:49,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:49,150 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:49,150 INFO L82 PathProgramCache]: Analyzing trace with hash 701800485, now seen corresponding path program 36 times [2021-08-21 12:58:49,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:49,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338548313] [2021-08-21 12:58:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:49,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:49,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:49,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338548313] [2021-08-21 12:58:49,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338548313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:49,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624063615] [2021-08-21 12:58:49,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:58:49,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:49,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:49,450 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:49,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 12:58:50,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:58:50,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:50,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:58:50,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:50,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:58:50,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-08-21 12:58:51,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-08-21 12:58:51,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-08-21 12:58:51,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-21 12:58:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:51,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624063615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:51,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:51,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:58:51,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23574580] [2021-08-21 12:58:51,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:58:51,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:51,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:58:51,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:58:51,104 INFO L87 Difference]: Start difference. First operand 10072 states and 36229 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:52,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:52,343 INFO L93 Difference]: Finished difference Result 15970 states and 56713 transitions. [2021-08-21 12:58:52,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 12:58:52,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:52,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:52,378 INFO L225 Difference]: With dead ends: 15970 [2021-08-21 12:58:52,379 INFO L226 Difference]: Without dead ends: 15931 [2021-08-21 12:58:52,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 872.2ms TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 12:58:52,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15931 states. [2021-08-21 12:58:52,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15931 to 10124. [2021-08-21 12:58:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10124 states, 10123 states have (on average 3.5954756495110147) internal successors, (36397), 10123 states have internal predecessors, (36397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10124 states to 10124 states and 36397 transitions. [2021-08-21 12:58:52,567 INFO L78 Accepts]: Start accepts. Automaton has 10124 states and 36397 transitions. Word has length 30 [2021-08-21 12:58:52,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:52,568 INFO L470 AbstractCegarLoop]: Abstraction has 10124 states and 36397 transitions. [2021-08-21 12:58:52,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:52,568 INFO L276 IsEmpty]: Start isEmpty. Operand 10124 states and 36397 transitions. [2021-08-21 12:58:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:52,583 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:52,583 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:52,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 12:58:52,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-21 12:58:52,783 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:52,784 INFO L82 PathProgramCache]: Analyzing trace with hash -416994807, now seen corresponding path program 37 times [2021-08-21 12:58:52,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:52,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172930385] [2021-08-21 12:58:52,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:52,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:53,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:53,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172930385] [2021-08-21 12:58:53,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172930385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:53,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586088606] [2021-08-21 12:58:53,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:58:53,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:53,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:53,020 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:53,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 12:58:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:54,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:58:54,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:54,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:54,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 12:58:54,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:58:54,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-08-21 12:58:54,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-08-21 12:58:54,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-21 12:58:54,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 12:58:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:54,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586088606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:54,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:54,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-21 12:58:54,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37485606] [2021-08-21 12:58:54,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:58:54,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:54,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:58:54,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:58:54,823 INFO L87 Difference]: Start difference. First operand 10124 states and 36397 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:55,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:58:55,981 INFO L93 Difference]: Finished difference Result 15945 states and 56594 transitions. [2021-08-21 12:58:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 12:58:55,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:58:55,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:58:56,064 INFO L225 Difference]: With dead ends: 15945 [2021-08-21 12:58:56,064 INFO L226 Difference]: Without dead ends: 15918 [2021-08-21 12:58:56,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 825.3ms TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 12:58:56,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15918 states. [2021-08-21 12:58:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15918 to 10124. [2021-08-21 12:58:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10124 states, 10123 states have (on average 3.5969574236886297) internal successors, (36412), 10123 states have internal predecessors, (36412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:56,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10124 states to 10124 states and 36412 transitions. [2021-08-21 12:58:56,229 INFO L78 Accepts]: Start accepts. Automaton has 10124 states and 36412 transitions. Word has length 30 [2021-08-21 12:58:56,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:58:56,230 INFO L470 AbstractCegarLoop]: Abstraction has 10124 states and 36412 transitions. [2021-08-21 12:58:56,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:58:56,230 INFO L276 IsEmpty]: Start isEmpty. Operand 10124 states and 36412 transitions. [2021-08-21 12:58:56,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:58:56,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:58:56,245 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:58:56,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 12:58:56,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-21 12:58:56,446 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:58:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:58:56,447 INFO L82 PathProgramCache]: Analyzing trace with hash -22684839, now seen corresponding path program 38 times [2021-08-21 12:58:56,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:58:56,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902540402] [2021-08-21 12:58:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:58:56,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:58:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:58:56,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:56,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:58:56,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902540402] [2021-08-21 12:58:56,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902540402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:56,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827000079] [2021-08-21 12:58:56,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:58:56,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:58:56,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:58:56,645 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:58:56,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 12:58:57,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:58:57,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:58:57,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:58:57,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:58:58,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:58:58,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2021-08-21 12:58:58,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2021-08-21 12:58:58,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-08-21 12:58:58,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 12:58:58,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 37 [2021-08-21 12:58:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:58:58,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827000079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:58:58,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:58:58,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-21 12:58:58,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635612101] [2021-08-21 12:58:58,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 12:58:58,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:58:58,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 12:58:58,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:58:58,595 INFO L87 Difference]: Start difference. First operand 10124 states and 36412 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:00,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:00,783 INFO L93 Difference]: Finished difference Result 19053 states and 63427 transitions. [2021-08-21 12:59:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 12:59:00,784 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:59:00,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:00,824 INFO L225 Difference]: With dead ends: 19053 [2021-08-21 12:59:00,824 INFO L226 Difference]: Without dead ends: 18894 [2021-08-21 12:59:00,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1526.2ms TimeCoverageRelationStatistics Valid=524, Invalid=2898, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 12:59:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18894 states. [2021-08-21 12:59:01,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18894 to 10655. [2021-08-21 12:59:01,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10655 states, 10654 states have (on average 3.6141355359489395) internal successors, (38505), 10654 states have internal predecessors, (38505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10655 states to 10655 states and 38505 transitions. [2021-08-21 12:59:01,055 INFO L78 Accepts]: Start accepts. Automaton has 10655 states and 38505 transitions. Word has length 30 [2021-08-21 12:59:01,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:01,056 INFO L470 AbstractCegarLoop]: Abstraction has 10655 states and 38505 transitions. [2021-08-21 12:59:01,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:01,056 INFO L276 IsEmpty]: Start isEmpty. Operand 10655 states and 38505 transitions. [2021-08-21 12:59:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:59:01,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:01,072 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:01,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:01,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 12:59:01,277 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:01,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:01,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1697328153, now seen corresponding path program 39 times [2021-08-21 12:59:01,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:01,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240967522] [2021-08-21 12:59:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:01,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:01,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:01,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240967522] [2021-08-21 12:59:01,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240967522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:01,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028297824] [2021-08-21 12:59:01,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:59:01,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:01,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:01,525 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:01,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 12:59:02,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 12:59:02,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:02,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:59:02,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:02,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:59:03,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2021-08-21 12:59:03,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2021-08-21 12:59:03,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 16 [2021-08-21 12:59:03,355 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 12:59:03,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 [2021-08-21 12:59:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:03,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028297824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:03,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:03,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 12:59:03,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959599574] [2021-08-21 12:59:03,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 12:59:03,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:03,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 12:59:03,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-21 12:59:03,435 INFO L87 Difference]: Start difference. First operand 10655 states and 38505 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:06,121 INFO L93 Difference]: Finished difference Result 14583 states and 49998 transitions. [2021-08-21 12:59:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 12:59:06,121 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:59:06,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:06,154 INFO L225 Difference]: With dead ends: 14583 [2021-08-21 12:59:06,154 INFO L226 Difference]: Without dead ends: 14499 [2021-08-21 12:59:06,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 2079.9ms TimeCoverageRelationStatistics Valid=451, Invalid=3089, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 12:59:06,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14499 states. [2021-08-21 12:59:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14499 to 10788. [2021-08-21 12:59:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10788 states, 10787 states have (on average 3.614628719755261) internal successors, (38991), 10787 states have internal predecessors, (38991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:06,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10788 states to 10788 states and 38991 transitions. [2021-08-21 12:59:06,386 INFO L78 Accepts]: Start accepts. Automaton has 10788 states and 38991 transitions. Word has length 30 [2021-08-21 12:59:06,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:06,387 INFO L470 AbstractCegarLoop]: Abstraction has 10788 states and 38991 transitions. [2021-08-21 12:59:06,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:06,387 INFO L276 IsEmpty]: Start isEmpty. Operand 10788 states and 38991 transitions. [2021-08-21 12:59:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:59:06,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:06,402 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:06,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:06,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 12:59:06,622 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:06,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:06,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1027608453, now seen corresponding path program 40 times [2021-08-21 12:59:06,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:06,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878973298] [2021-08-21 12:59:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:06,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:06,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:06,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878973298] [2021-08-21 12:59:06,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878973298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:06,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575817130] [2021-08-21 12:59:06,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:59:06,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:06,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:06,832 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:06,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 12:59:08,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:59:08,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:08,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:59:08,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:08,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:59:08,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:08,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:08,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-08-21 12:59:08,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-08-21 12:59:08,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-21 12:59:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:08,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575817130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:08,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:08,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 12:59:08,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073402265] [2021-08-21 12:59:08,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:59:08,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:08,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:59:08,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:59:08,716 INFO L87 Difference]: Start difference. First operand 10788 states and 38991 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:09,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:09,085 INFO L93 Difference]: Finished difference Result 11919 states and 42568 transitions. [2021-08-21 12:59:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:59:09,086 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:59:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:09,112 INFO L225 Difference]: With dead ends: 11919 [2021-08-21 12:59:09,112 INFO L226 Difference]: Without dead ends: 11886 [2021-08-21 12:59:09,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:59:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2021-08-21 12:59:09,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 10827. [2021-08-21 12:59:09,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10827 states, 10826 states have (on average 3.6134306299648995) internal successors, (39119), 10826 states have internal predecessors, (39119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:09,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10827 states to 10827 states and 39119 transitions. [2021-08-21 12:59:09,283 INFO L78 Accepts]: Start accepts. Automaton has 10827 states and 39119 transitions. Word has length 30 [2021-08-21 12:59:09,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:09,283 INFO L470 AbstractCegarLoop]: Abstraction has 10827 states and 39119 transitions. [2021-08-21 12:59:09,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 10827 states and 39119 transitions. [2021-08-21 12:59:09,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:59:09,300 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:09,300 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:09,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:09,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:09,504 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:09,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2146403745, now seen corresponding path program 41 times [2021-08-21 12:59:09,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:09,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75497468] [2021-08-21 12:59:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:09,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:09,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:09,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75497468] [2021-08-21 12:59:09,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75497468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:09,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482655837] [2021-08-21 12:59:09,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:59:09,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:09,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:09,731 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:09,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 12:59:11,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:59:11,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:11,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:59:11,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:11,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:59:11,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:11,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:11,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-08-21 12:59:11,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-08-21 12:59:11,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 12:59:11,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:11,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482655837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:11,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:11,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:59:11,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382471207] [2021-08-21 12:59:11,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:59:11,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:11,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:59:11,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:59:11,649 INFO L87 Difference]: Start difference. First operand 10827 states and 39119 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:11,939 INFO L93 Difference]: Finished difference Result 11546 states and 41350 transitions. [2021-08-21 12:59:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:59:11,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:59:11,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:11,965 INFO L225 Difference]: With dead ends: 11546 [2021-08-21 12:59:11,965 INFO L226 Difference]: Without dead ends: 11521 [2021-08-21 12:59:11,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 294.6ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-21 12:59:11,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11521 states. [2021-08-21 12:59:12,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11521 to 10819. [2021-08-21 12:59:12,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10819 states, 10818 states have (on average 3.615363283416528) internal successors, (39111), 10818 states have internal predecessors, (39111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:12,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10819 states to 10819 states and 39111 transitions. [2021-08-21 12:59:12,132 INFO L78 Accepts]: Start accepts. Automaton has 10819 states and 39111 transitions. Word has length 30 [2021-08-21 12:59:12,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:12,132 INFO L470 AbstractCegarLoop]: Abstraction has 10819 states and 39111 transitions. [2021-08-21 12:59:12,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:12,133 INFO L276 IsEmpty]: Start isEmpty. Operand 10819 states and 39111 transitions. [2021-08-21 12:59:12,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:59:12,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:12,149 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:12,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:12,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 12:59:12,349 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:12,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:12,350 INFO L82 PathProgramCache]: Analyzing trace with hash 198851673, now seen corresponding path program 42 times [2021-08-21 12:59:12,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:12,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153477466] [2021-08-21 12:59:12,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:12,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:12,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:12,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153477466] [2021-08-21 12:59:12,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153477466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:12,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831328489] [2021-08-21 12:59:12,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:59:12,565 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:12,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:12,566 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:12,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 12:59:14,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:59:14,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:14,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:59:14,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:14,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:59:14,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:14,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:14,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:14,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2021-08-21 12:59:14,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:14,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-08-21 12:59:14,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 12:59:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:14,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831328489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:14,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:14,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 12:59:14,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508202541] [2021-08-21 12:59:14,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:59:14,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:14,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:59:14,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:59:14,583 INFO L87 Difference]: Start difference. First operand 10819 states and 39111 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:14,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:14,923 INFO L93 Difference]: Finished difference Result 11476 states and 41080 transitions. [2021-08-21 12:59:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:59:14,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:59:14,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:14,950 INFO L225 Difference]: With dead ends: 11476 [2021-08-21 12:59:14,950 INFO L226 Difference]: Without dead ends: 11451 [2021-08-21 12:59:14,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:59:14,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11451 states. [2021-08-21 12:59:15,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11451 to 10827. [2021-08-21 12:59:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10827 states, 10826 states have (on average 3.6166635876593385) internal successors, (39154), 10826 states have internal predecessors, (39154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10827 states to 10827 states and 39154 transitions. [2021-08-21 12:59:15,122 INFO L78 Accepts]: Start accepts. Automaton has 10827 states and 39154 transitions. Word has length 30 [2021-08-21 12:59:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:15,122 INFO L470 AbstractCegarLoop]: Abstraction has 10827 states and 39154 transitions. [2021-08-21 12:59:15,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 10827 states and 39154 transitions. [2021-08-21 12:59:15,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:59:15,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:15,139 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:15,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:15,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 12:59:15,340 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:15,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:15,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1529864005, now seen corresponding path program 43 times [2021-08-21 12:59:15,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:15,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441810754] [2021-08-21 12:59:15,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:15,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:15,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:15,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441810754] [2021-08-21 12:59:15,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441810754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:15,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678741128] [2021-08-21 12:59:15,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:59:15,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:15,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:15,647 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:15,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 12:59:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:17,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:59:17,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:17,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:59:17,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:17,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:17,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:17,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-08-21 12:59:17,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-08-21 12:59:17,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-21 12:59:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:17,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678741128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:17,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:17,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 12:59:17,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135141200] [2021-08-21 12:59:17,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:59:17,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:17,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:59:17,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:59:17,643 INFO L87 Difference]: Start difference. First operand 10827 states and 39154 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:17,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:17,987 INFO L93 Difference]: Finished difference Result 11961 states and 42825 transitions. [2021-08-21 12:59:17,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:59:17,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:59:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:18,013 INFO L225 Difference]: With dead ends: 11961 [2021-08-21 12:59:18,014 INFO L226 Difference]: Without dead ends: 11928 [2021-08-21 12:59:18,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:59:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11928 states. [2021-08-21 12:59:18,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11928 to 10860. [2021-08-21 12:59:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10860 states, 10859 states have (on average 3.6163550971544343) internal successors, (39270), 10859 states have internal predecessors, (39270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10860 states to 10860 states and 39270 transitions. [2021-08-21 12:59:18,184 INFO L78 Accepts]: Start accepts. Automaton has 10860 states and 39270 transitions. Word has length 30 [2021-08-21 12:59:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:18,185 INFO L470 AbstractCegarLoop]: Abstraction has 10860 states and 39270 transitions. [2021-08-21 12:59:18,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand 10860 states and 39270 transitions. [2021-08-21 12:59:18,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:59:18,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:18,201 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:18,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 12:59:18,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-08-21 12:59:18,402 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:18,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:18,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1344651679, now seen corresponding path program 44 times [2021-08-21 12:59:18,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:18,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623958930] [2021-08-21 12:59:18,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:18,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:18,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:18,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623958930] [2021-08-21 12:59:18,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623958930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:18,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584965800] [2021-08-21 12:59:18,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:59:18,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:18,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:18,572 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:18,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 12:59:20,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:59:20,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:20,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:59:20,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:20,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:59:20,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:20,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:20,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-08-21 12:59:20,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-08-21 12:59:20,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-08-21 12:59:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:20,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584965800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:20,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:20,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 12:59:20,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712375381] [2021-08-21 12:59:20,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:59:20,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:20,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:59:20,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:59:20,665 INFO L87 Difference]: Start difference. First operand 10860 states and 39270 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:20,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:20,991 INFO L93 Difference]: Finished difference Result 11760 states and 42170 transitions. [2021-08-21 12:59:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:59:20,991 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:59:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:21,017 INFO L225 Difference]: With dead ends: 11760 [2021-08-21 12:59:21,017 INFO L226 Difference]: Without dead ends: 11697 [2021-08-21 12:59:21,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 253.5ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:59:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11697 states. [2021-08-21 12:59:21,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11697 to 10805. [2021-08-21 12:59:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10805 states, 10804 states have (on average 3.6201406886338394) internal successors, (39112), 10804 states have internal predecessors, (39112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10805 states to 10805 states and 39112 transitions. [2021-08-21 12:59:21,190 INFO L78 Accepts]: Start accepts. Automaton has 10805 states and 39112 transitions. Word has length 30 [2021-08-21 12:59:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:21,190 INFO L470 AbstractCegarLoop]: Abstraction has 10805 states and 39112 transitions. [2021-08-21 12:59:21,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:21,190 INFO L276 IsEmpty]: Start isEmpty. Operand 10805 states and 39112 transitions. [2021-08-21 12:59:21,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:59:21,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:21,207 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:21,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 12:59:21,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:21,407 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:21,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:21,408 INFO L82 PathProgramCache]: Analyzing trace with hash 324833635, now seen corresponding path program 45 times [2021-08-21 12:59:21,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:21,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9339504] [2021-08-21 12:59:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:21,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:21,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:21,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9339504] [2021-08-21 12:59:21,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9339504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:21,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116531202] [2021-08-21 12:59:21,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:59:21,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:21,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:21,586 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:21,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 12:59:23,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:59:23,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:23,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 12:59:23,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:23,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:59:23,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:23,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:23,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-08-21 12:59:23,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-21 12:59:23,751 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 12:59:23,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 22 [2021-08-21 12:59:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:23,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116531202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:23,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:23,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 12:59:23,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900186355] [2021-08-21 12:59:23,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 12:59:23,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:23,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 12:59:23,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-21 12:59:23,799 INFO L87 Difference]: Start difference. First operand 10805 states and 39112 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:24,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:24,292 INFO L93 Difference]: Finished difference Result 12029 states and 43013 transitions. [2021-08-21 12:59:24,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 12:59:24,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:59:24,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:24,321 INFO L225 Difference]: With dead ends: 12029 [2021-08-21 12:59:24,321 INFO L226 Difference]: Without dead ends: 11996 [2021-08-21 12:59:24,322 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-21 12:59:24,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11996 states. [2021-08-21 12:59:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11996 to 10845. [2021-08-21 12:59:24,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10845 states, 10844 states have (on average 3.6207119144227224) internal successors, (39263), 10844 states have internal predecessors, (39263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10845 states to 10845 states and 39263 transitions. [2021-08-21 12:59:24,530 INFO L78 Accepts]: Start accepts. Automaton has 10845 states and 39263 transitions. Word has length 30 [2021-08-21 12:59:24,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:24,531 INFO L470 AbstractCegarLoop]: Abstraction has 10845 states and 39263 transitions. [2021-08-21 12:59:24,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 10845 states and 39263 transitions. [2021-08-21 12:59:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:59:24,548 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:24,548 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:24,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 12:59:24,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:24,749 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:24,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:24,749 INFO L82 PathProgramCache]: Analyzing trace with hash 277277977, now seen corresponding path program 46 times [2021-08-21 12:59:24,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:24,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578585605] [2021-08-21 12:59:24,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:24,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:24,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:24,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578585605] [2021-08-21 12:59:24,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578585605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:24,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678357895] [2021-08-21 12:59:24,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:59:24,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:24,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:24,948 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:24,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 12:59:26,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:59:26,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:26,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:59:26,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:26,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:59:26,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:26,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:27,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-08-21 12:59:27,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-08-21 12:59:27,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-08-21 12:59:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:27,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678357895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:27,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:27,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 12:59:27,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710926370] [2021-08-21 12:59:27,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:59:27,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:27,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:59:27,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:59:27,135 INFO L87 Difference]: Start difference. First operand 10845 states and 39263 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:27,531 INFO L93 Difference]: Finished difference Result 11789 states and 42308 transitions. [2021-08-21 12:59:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:59:27,532 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:59:27,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:27,557 INFO L225 Difference]: With dead ends: 11789 [2021-08-21 12:59:27,557 INFO L226 Difference]: Without dead ends: 11756 [2021-08-21 12:59:27,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:59:27,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11756 states. [2021-08-21 12:59:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11756 to 10893. [2021-08-21 12:59:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10893 states, 10892 states have (on average 3.621740727139185) internal successors, (39448), 10892 states have internal predecessors, (39448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10893 states to 10893 states and 39448 transitions. [2021-08-21 12:59:27,732 INFO L78 Accepts]: Start accepts. Automaton has 10893 states and 39448 transitions. Word has length 30 [2021-08-21 12:59:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:27,732 INFO L470 AbstractCegarLoop]: Abstraction has 10893 states and 39448 transitions. [2021-08-21 12:59:27,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:27,733 INFO L276 IsEmpty]: Start isEmpty. Operand 10893 states and 39448 transitions. [2021-08-21 12:59:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:59:27,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:27,749 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:27,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 12:59:27,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:27,950 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:27,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:27,950 INFO L82 PathProgramCache]: Analyzing trace with hash -742540067, now seen corresponding path program 47 times [2021-08-21 12:59:27,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:27,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572626770] [2021-08-21 12:59:27,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:27,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:28,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:28,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572626770] [2021-08-21 12:59:28,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572626770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:28,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632396952] [2021-08-21 12:59:28,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:59:28,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:28,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:28,130 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:28,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 12:59:29,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:59:29,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:29,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 12:59:29,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:29,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 12:59:30,075 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-21 12:59:30,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2021-08-21 12:59:30,642 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 12:59:30,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 69 [2021-08-21 12:59:30,727 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 12:59:30,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 88 [2021-08-21 12:59:30,841 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-08-21 12:59:30,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 75 [2021-08-21 12:59:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:31,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632396952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:31,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:31,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-08-21 12:59:31,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077547608] [2021-08-21 12:59:31,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 12:59:31,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:31,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 12:59:31,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=360, Unknown=1, NotChecked=0, Total=420 [2021-08-21 12:59:31,008 INFO L87 Difference]: Start difference. First operand 10893 states and 39448 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:38,271 INFO L93 Difference]: Finished difference Result 11615 states and 41483 transitions. [2021-08-21 12:59:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 12:59:38,271 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:59:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:38,297 INFO L225 Difference]: With dead ends: 11615 [2021-08-21 12:59:38,297 INFO L226 Difference]: Without dead ends: 11573 [2021-08-21 12:59:38,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1131.8ms TimeCoverageRelationStatistics Valid=171, Invalid=949, Unknown=2, NotChecked=0, Total=1122 [2021-08-21 12:59:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11573 states. [2021-08-21 12:59:38,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11573 to 10915. [2021-08-21 12:59:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10915 states, 10914 states have (on average 3.620762323621037) internal successors, (39517), 10914 states have internal predecessors, (39517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10915 states to 10915 states and 39517 transitions. [2021-08-21 12:59:38,469 INFO L78 Accepts]: Start accepts. Automaton has 10915 states and 39517 transitions. Word has length 30 [2021-08-21 12:59:38,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:38,469 INFO L470 AbstractCegarLoop]: Abstraction has 10915 states and 39517 transitions. [2021-08-21 12:59:38,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:38,469 INFO L276 IsEmpty]: Start isEmpty. Operand 10915 states and 39517 transitions. [2021-08-21 12:59:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:59:38,486 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:38,486 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:38,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:38,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 12:59:38,687 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:38,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1465748903, now seen corresponding path program 48 times [2021-08-21 12:59:38,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:38,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97973057] [2021-08-21 12:59:38,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:38,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:38,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:38,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97973057] [2021-08-21 12:59:38,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97973057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:38,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772640972] [2021-08-21 12:59:38,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:59:38,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:38,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:38,856 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:38,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 12:59:40,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 12:59:40,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:40,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:59:40,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:40,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:59:40,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:40,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-08-21 12:59:40,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2021-08-21 12:59:40,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-08-21 12:59:41,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 12:59:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:41,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772640972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:41,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:41,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 12:59:41,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320874556] [2021-08-21 12:59:41,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:59:41,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:59:41,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:59:41,078 INFO L87 Difference]: Start difference. First operand 10915 states and 39517 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:41,365 INFO L93 Difference]: Finished difference Result 11693 states and 41917 transitions. [2021-08-21 12:59:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:59:41,365 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:59:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:41,391 INFO L225 Difference]: With dead ends: 11693 [2021-08-21 12:59:41,391 INFO L226 Difference]: Without dead ends: 11660 [2021-08-21 12:59:41,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:59:41,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11660 states. [2021-08-21 12:59:41,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11660 to 10919. [2021-08-21 12:59:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10919 states, 10918 states have (on average 3.6230994687671734) internal successors, (39557), 10918 states have internal predecessors, (39557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10919 states to 10919 states and 39557 transitions. [2021-08-21 12:59:41,594 INFO L78 Accepts]: Start accepts. Automaton has 10919 states and 39557 transitions. Word has length 30 [2021-08-21 12:59:41,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:41,594 INFO L470 AbstractCegarLoop]: Abstraction has 10919 states and 39557 transitions. [2021-08-21 12:59:41,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 10919 states and 39557 transitions. [2021-08-21 12:59:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 12:59:41,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:41,611 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:41,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 12:59:41,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 12:59:41,811 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:41,812 INFO L82 PathProgramCache]: Analyzing trace with hash 571495377, now seen corresponding path program 49 times [2021-08-21 12:59:41,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:41,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889473395] [2021-08-21 12:59:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:41,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:41,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:41,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889473395] [2021-08-21 12:59:41,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889473395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:41,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694067285] [2021-08-21 12:59:41,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 12:59:41,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:41,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:41,990 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:41,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 12:59:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:43,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 12:59:43,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:43,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-08-21 12:59:44,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:44,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-08-21 12:59:44,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:44,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 57 [2021-08-21 12:59:44,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 12:59:44,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2021-08-21 12:59:44,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-21 12:59:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:44,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694067285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:44,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:44,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-08-21 12:59:44,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726794467] [2021-08-21 12:59:44,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 12:59:44,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:44,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 12:59:44,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-21 12:59:44,314 INFO L87 Difference]: Start difference. First operand 10919 states and 39557 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:44,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:44,695 INFO L93 Difference]: Finished difference Result 11835 states and 42425 transitions. [2021-08-21 12:59:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:59:44,695 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 12:59:44,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:44,722 INFO L225 Difference]: With dead ends: 11835 [2021-08-21 12:59:44,723 INFO L226 Difference]: Without dead ends: 11814 [2021-08-21 12:59:44,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 243.6ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 12:59:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11814 states. [2021-08-21 12:59:44,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11814 to 10903. [2021-08-21 12:59:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10903 states, 10902 states have (on average 3.6238304898183817) internal successors, (39507), 10902 states have internal predecessors, (39507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:44,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10903 states to 10903 states and 39507 transitions. [2021-08-21 12:59:44,898 INFO L78 Accepts]: Start accepts. Automaton has 10903 states and 39507 transitions. Word has length 30 [2021-08-21 12:59:44,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:44,898 INFO L470 AbstractCegarLoop]: Abstraction has 10903 states and 39507 transitions. [2021-08-21 12:59:44,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:44,898 INFO L276 IsEmpty]: Start isEmpty. Operand 10903 states and 39507 transitions. [2021-08-21 12:59:44,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:59:44,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:44,915 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:44,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-21 12:59:45,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-21 12:59:45,121 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:45,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:45,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1959107467, now seen corresponding path program 50 times [2021-08-21 12:59:45,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:45,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107839479] [2021-08-21 12:59:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:45,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:45,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:45,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107839479] [2021-08-21 12:59:45,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107839479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:45,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205585832] [2021-08-21 12:59:45,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 12:59:45,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:45,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:45,165 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:45,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 12:59:46,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 12:59:46,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:46,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:59:46,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:47,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205585832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:47,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:47,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 12:59:47,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067946203] [2021-08-21 12:59:47,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 12:59:47,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:47,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 12:59:47,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 12:59:47,031 INFO L87 Difference]: Start difference. First operand 10903 states and 39507 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:47,212 INFO L93 Difference]: Finished difference Result 15151 states and 53367 transitions. [2021-08-21 12:59:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 12:59:47,213 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:59:47,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:47,249 INFO L225 Difference]: With dead ends: 15151 [2021-08-21 12:59:47,249 INFO L226 Difference]: Without dead ends: 15085 [2021-08-21 12:59:47,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 12:59:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15085 states. [2021-08-21 12:59:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15085 to 11585. [2021-08-21 12:59:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11585 states, 11584 states have (on average 3.620942679558011) internal successors, (41945), 11584 states have internal predecessors, (41945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:47,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11585 states to 11585 states and 41945 transitions. [2021-08-21 12:59:47,535 INFO L78 Accepts]: Start accepts. Automaton has 11585 states and 41945 transitions. Word has length 32 [2021-08-21 12:59:47,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:47,535 INFO L470 AbstractCegarLoop]: Abstraction has 11585 states and 41945 transitions. [2021-08-21 12:59:47,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:47,535 INFO L276 IsEmpty]: Start isEmpty. Operand 11585 states and 41945 transitions. [2021-08-21 12:59:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:59:47,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:47,553 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:47,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 12:59:47,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-21 12:59:47,753 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:47,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:47,754 INFO L82 PathProgramCache]: Analyzing trace with hash -78658891, now seen corresponding path program 51 times [2021-08-21 12:59:47,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:47,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8816381] [2021-08-21 12:59:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:47,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:47,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:47,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:47,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8816381] [2021-08-21 12:59:47,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8816381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:47,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21670723] [2021-08-21 12:59:47,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 12:59:47,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:47,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:47,800 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:47,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 12:59:49,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 12:59:49,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:49,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:59:49,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:49,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21670723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:49,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:49,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 12:59:49,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964874852] [2021-08-21 12:59:49,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 12:59:49,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:49,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 12:59:49,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:59:49,702 INFO L87 Difference]: Start difference. First operand 11585 states and 41945 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:51,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:51,130 INFO L93 Difference]: Finished difference Result 30964 states and 106377 transitions. [2021-08-21 12:59:51,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-08-21 12:59:51,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:59:51,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:51,209 INFO L225 Difference]: With dead ends: 30964 [2021-08-21 12:59:51,209 INFO L226 Difference]: Without dead ends: 30682 [2021-08-21 12:59:51,211 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3648 ImplicationChecksByTransitivity, 789.7ms TimeCoverageRelationStatistics Valid=1722, Invalid=7784, Unknown=0, NotChecked=0, Total=9506 [2021-08-21 12:59:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30682 states. [2021-08-21 12:59:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30682 to 21397. [2021-08-21 12:59:51,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21397 states, 21396 states have (on average 3.7230323424939242) internal successors, (79658), 21396 states have internal predecessors, (79658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21397 states to 21397 states and 79658 transitions. [2021-08-21 12:59:51,777 INFO L78 Accepts]: Start accepts. Automaton has 21397 states and 79658 transitions. Word has length 32 [2021-08-21 12:59:51,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:51,777 INFO L470 AbstractCegarLoop]: Abstraction has 21397 states and 79658 transitions. [2021-08-21 12:59:51,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 21397 states and 79658 transitions. [2021-08-21 12:59:51,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:59:51,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:51,815 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:51,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 12:59:52,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-21 12:59:52,015 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:52,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:52,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1606264049, now seen corresponding path program 52 times [2021-08-21 12:59:52,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:52,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827813906] [2021-08-21 12:59:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:52,016 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:52,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:52,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827813906] [2021-08-21 12:59:52,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827813906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:52,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484614330] [2021-08-21 12:59:52,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 12:59:52,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:52,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:52,062 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:52,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 12:59:53,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 12:59:53,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:53,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:59:53,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 12:59:54,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484614330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:54,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:54,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 12:59:54,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569057497] [2021-08-21 12:59:54,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:59:54,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:54,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:59:54,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:59:54,009 INFO L87 Difference]: Start difference. First operand 21397 states and 79658 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:54,179 INFO L93 Difference]: Finished difference Result 22758 states and 83579 transitions. [2021-08-21 12:59:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 12:59:54,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:59:54,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:54,238 INFO L225 Difference]: With dead ends: 22758 [2021-08-21 12:59:54,238 INFO L226 Difference]: Without dead ends: 22734 [2021-08-21 12:59:54,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-08-21 12:59:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22734 states. [2021-08-21 12:59:54,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22734 to 21321. [2021-08-21 12:59:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21321 states, 21320 states have (on average 3.723968105065666) internal successors, (79395), 21320 states have internal predecessors, (79395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21321 states to 21321 states and 79395 transitions. [2021-08-21 12:59:54,732 INFO L78 Accepts]: Start accepts. Automaton has 21321 states and 79395 transitions. Word has length 32 [2021-08-21 12:59:54,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:54,732 INFO L470 AbstractCegarLoop]: Abstraction has 21321 states and 79395 transitions. [2021-08-21 12:59:54,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:54,732 INFO L276 IsEmpty]: Start isEmpty. Operand 21321 states and 79395 transitions. [2021-08-21 12:59:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:59:54,767 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:54,767 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:54,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 12:59:54,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 12:59:54,967 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:54,968 INFO L82 PathProgramCache]: Analyzing trace with hash -257388111, now seen corresponding path program 53 times [2021-08-21 12:59:54,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:54,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760059264] [2021-08-21 12:59:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:54,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:59:55,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:55,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760059264] [2021-08-21 12:59:55,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760059264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:55,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581600841] [2021-08-21 12:59:55,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 12:59:55,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:55,016 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:55,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 12:59:57,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 12:59:57,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 12:59:57,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 12:59:57,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 12:59:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 12:59:57,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581600841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:57,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 12:59:57,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-21 12:59:57,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070508039] [2021-08-21 12:59:57,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 12:59:57,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 12:59:57,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 12:59:57,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-21 12:59:57,077 INFO L87 Difference]: Start difference. First operand 21321 states and 79395 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:57,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 12:59:57,557 INFO L93 Difference]: Finished difference Result 60664 states and 222623 transitions. [2021-08-21 12:59:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 12:59:57,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 12:59:57,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 12:59:57,841 INFO L225 Difference]: With dead ends: 60664 [2021-08-21 12:59:57,841 INFO L226 Difference]: Without dead ends: 60664 [2021-08-21 12:59:57,842 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-21 12:59:57,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60664 states. [2021-08-21 12:59:58,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60664 to 41106. [2021-08-21 12:59:58,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41106 states, 41105 states have (on average 3.7976645176985766) internal successors, (156103), 41105 states have internal predecessors, (156103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:58,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41106 states to 41106 states and 156103 transitions. [2021-08-21 12:59:58,994 INFO L78 Accepts]: Start accepts. Automaton has 41106 states and 156103 transitions. Word has length 32 [2021-08-21 12:59:58,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 12:59:58,995 INFO L470 AbstractCegarLoop]: Abstraction has 41106 states and 156103 transitions. [2021-08-21 12:59:58,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 12:59:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 41106 states and 156103 transitions. [2021-08-21 12:59:59,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 12:59:59,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 12:59:59,062 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 12:59:59,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 12:59:59,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:59,263 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 12:59:59,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 12:59:59,263 INFO L82 PathProgramCache]: Analyzing trace with hash 252646705, now seen corresponding path program 54 times [2021-08-21 12:59:59,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 12:59:59,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433153860] [2021-08-21 12:59:59,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 12:59:59,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 12:59:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 12:59:59,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 12:59:59,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 12:59:59,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433153860] [2021-08-21 12:59:59,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433153860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 12:59:59,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051637281] [2021-08-21 12:59:59,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 12:59:59,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 12:59:59,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 12:59:59,499 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 12:59:59,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 13:00:01,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 13:00:01,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:01,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:00:01,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:00:01,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051637281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:01,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:01,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-08-21 13:00:01,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680553434] [2021-08-21 13:00:01,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 13:00:01,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 13:00:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-21 13:00:01,551 INFO L87 Difference]: Start difference. First operand 41106 states and 156103 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:02,937 INFO L93 Difference]: Finished difference Result 72093 states and 257328 transitions. [2021-08-21 13:00:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-21 13:00:02,937 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 13:00:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:03,176 INFO L225 Difference]: With dead ends: 72093 [2021-08-21 13:00:03,176 INFO L226 Difference]: Without dead ends: 72069 [2021-08-21 13:00:03,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 629.9ms TimeCoverageRelationStatistics Valid=1390, Invalid=4160, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 13:00:03,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72069 states. [2021-08-21 13:00:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72069 to 30987. [2021-08-21 13:00:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30987 states, 30986 states have (on average 3.7476602336539084) internal successors, (116125), 30986 states have internal predecessors, (116125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:04,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30987 states to 30987 states and 116125 transitions. [2021-08-21 13:00:04,963 INFO L78 Accepts]: Start accepts. Automaton has 30987 states and 116125 transitions. Word has length 32 [2021-08-21 13:00:04,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:04,963 INFO L470 AbstractCegarLoop]: Abstraction has 30987 states and 116125 transitions. [2021-08-21 13:00:04,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:04,963 INFO L276 IsEmpty]: Start isEmpty. Operand 30987 states and 116125 transitions. [2021-08-21 13:00:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:00:05,018 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:05,018 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:05,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 13:00:05,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:05,219 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:05,219 INFO L82 PathProgramCache]: Analyzing trace with hash 58249501, now seen corresponding path program 55 times [2021-08-21 13:00:05,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:05,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595662208] [2021-08-21 13:00:05,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:05,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:00:05,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:05,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595662208] [2021-08-21 13:00:05,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595662208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:05,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351883736] [2021-08-21 13:00:05,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:00:05,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:05,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:05,265 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:05,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 13:00:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:07,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:00:07,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:07,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351883736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:07,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:07,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-21 13:00:07,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434667612] [2021-08-21 13:00:07,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:00:07,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:07,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:00:07,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:00:07,371 INFO L87 Difference]: Start difference. First operand 30987 states and 116125 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:08,433 INFO L93 Difference]: Finished difference Result 80900 states and 291756 transitions. [2021-08-21 13:00:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 13:00:08,434 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 13:00:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:08,732 INFO L225 Difference]: With dead ends: 80900 [2021-08-21 13:00:08,732 INFO L226 Difference]: Without dead ends: 79810 [2021-08-21 13:00:08,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 257.6ms TimeCoverageRelationStatistics Valid=459, Invalid=1433, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:00:08,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79810 states. [2021-08-21 13:00:10,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79810 to 53693. [2021-08-21 13:00:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53693 states, 53692 states have (on average 3.8039931460925276) internal successors, (204244), 53692 states have internal predecessors, (204244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:10,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53693 states to 53693 states and 204244 transitions. [2021-08-21 13:00:10,820 INFO L78 Accepts]: Start accepts. Automaton has 53693 states and 204244 transitions. Word has length 32 [2021-08-21 13:00:10,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:10,820 INFO L470 AbstractCegarLoop]: Abstraction has 53693 states and 204244 transitions. [2021-08-21 13:00:10,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:10,820 INFO L276 IsEmpty]: Start isEmpty. Operand 53693 states and 204244 transitions. [2021-08-21 13:00:10,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:00:10,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:10,891 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:10,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:11,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:11,092 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash -187024611, now seen corresponding path program 56 times [2021-08-21 13:00:11,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:11,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225524510] [2021-08-21 13:00:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:11,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:11,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:11,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225524510] [2021-08-21 13:00:11,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225524510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:11,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822862152] [2021-08-21 13:00:11,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:00:11,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:11,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:11,133 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:11,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 13:00:13,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:00:13,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:00:13,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:00:13,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822862152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:13,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:13,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 13:00:13,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215010782] [2021-08-21 13:00:13,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:00:13,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:13,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:00:13,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:00:13,341 INFO L87 Difference]: Start difference. First operand 53693 states and 204244 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:14,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:14,759 INFO L93 Difference]: Finished difference Result 86730 states and 310993 transitions. [2021-08-21 13:00:14,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-21 13:00:14,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 13:00:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:15,123 INFO L225 Difference]: With dead ends: 86730 [2021-08-21 13:00:15,124 INFO L226 Difference]: Without dead ends: 86696 [2021-08-21 13:00:15,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 567.7ms TimeCoverageRelationStatistics Valid=1091, Invalid=4609, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 13:00:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86696 states. [2021-08-21 13:00:16,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86696 to 47596. [2021-08-21 13:00:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47596 states, 47595 states have (on average 3.773589662779704) internal successors, (179604), 47595 states have internal predecessors, (179604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47596 states to 47596 states and 179604 transitions. [2021-08-21 13:00:17,299 INFO L78 Accepts]: Start accepts. Automaton has 47596 states and 179604 transitions. Word has length 32 [2021-08-21 13:00:17,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:17,299 INFO L470 AbstractCegarLoop]: Abstraction has 47596 states and 179604 transitions. [2021-08-21 13:00:17,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:17,299 INFO L276 IsEmpty]: Start isEmpty. Operand 47596 states and 179604 transitions. [2021-08-21 13:00:17,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:00:17,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:17,371 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:17,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:17,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-21 13:00:17,573 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:17,581 INFO L82 PathProgramCache]: Analyzing trace with hash 168882257, now seen corresponding path program 57 times [2021-08-21 13:00:17,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:17,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210784038] [2021-08-21 13:00:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:17,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:17,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:17,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210784038] [2021-08-21 13:00:17,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210784038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:17,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722071115] [2021-08-21 13:00:17,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:00:17,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:17,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:17,617 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:17,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 13:00:19,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 13:00:19,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:19,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 13:00:19,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:19,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-08-21 13:00:20,391 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-08-21 13:00:20,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 68 [2021-08-21 13:00:20,409 INFO L354 Elim1Store]: treesize reduction 72, result has 11.1 percent of original size [2021-08-21 13:00:20,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 57 [2021-08-21 13:00:20,423 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-08-21 13:00:20,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 47 [2021-08-21 13:00:20,635 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-21 13:00:20,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2021-08-21 13:00:20,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:00:20,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722071115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:20,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:20,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15] total 20 [2021-08-21 13:00:20,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364654511] [2021-08-21 13:00:20,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 13:00:20,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:20,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 13:00:20,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-21 13:00:20,874 INFO L87 Difference]: Start difference. First operand 47596 states and 179604 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:23,638 INFO L93 Difference]: Finished difference Result 57291 states and 213003 transitions. [2021-08-21 13:00:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:00:23,638 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 13:00:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:23,833 INFO L225 Difference]: With dead ends: 57291 [2021-08-21 13:00:23,833 INFO L226 Difference]: Without dead ends: 57255 [2021-08-21 13:00:23,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1224.9ms TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 13:00:23,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57255 states. [2021-08-21 13:00:24,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57255 to 49148. [2021-08-21 13:00:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49148 states, 49147 states have (on average 3.7865179970293203) internal successors, (186096), 49147 states have internal predecessors, (186096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:25,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49148 states to 49148 states and 186096 transitions. [2021-08-21 13:00:25,267 INFO L78 Accepts]: Start accepts. Automaton has 49148 states and 186096 transitions. Word has length 32 [2021-08-21 13:00:25,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:25,267 INFO L470 AbstractCegarLoop]: Abstraction has 49148 states and 186096 transitions. [2021-08-21 13:00:25,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:25,268 INFO L276 IsEmpty]: Start isEmpty. Operand 49148 states and 186096 transitions. [2021-08-21 13:00:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:00:25,352 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:25,352 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:25,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:25,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 13:00:25,553 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:25,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1704412937, now seen corresponding path program 58 times [2021-08-21 13:00:25,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:25,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6032171] [2021-08-21 13:00:25,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:25,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:00:25,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:25,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6032171] [2021-08-21 13:00:25,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6032171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:25,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388501434] [2021-08-21 13:00:25,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:00:25,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:25,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:25,609 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:25,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 13:00:27,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:00:27,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:27,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:00:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 13:00:27,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388501434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:27,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:27,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 13:00:27,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309789729] [2021-08-21 13:00:27,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:00:27,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:27,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:00:27,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:00:27,815 INFO L87 Difference]: Start difference. First operand 49148 states and 186096 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) [2021-08-21 13:00:28,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:28,578 INFO L93 Difference]: Finished difference Result 116806 states and 436020 transitions. [2021-08-21 13:00:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 13:00:28,578 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 32 [2021-08-21 13:00:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:29,297 INFO L225 Difference]: With dead ends: 116806 [2021-08-21 13:00:29,297 INFO L226 Difference]: Without dead ends: 116806 [2021-08-21 13:00:29,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:00:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116806 states. [2021-08-21 13:00:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116806 to 86374. [2021-08-21 13:00:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86374 states, 86373 states have (on average 3.8497910226575436) internal successors, (332518), 86373 states have internal predecessors, (332518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86374 states to 86374 states and 332518 transitions. [2021-08-21 13:00:32,408 INFO L78 Accepts]: Start accepts. Automaton has 86374 states and 332518 transitions. Word has length 32 [2021-08-21 13:00:32,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:32,409 INFO L470 AbstractCegarLoop]: Abstraction has 86374 states and 332518 transitions. [2021-08-21 13:00:32,409 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) [2021-08-21 13:00:32,409 INFO L276 IsEmpty]: Start isEmpty. Operand 86374 states and 332518 transitions. [2021-08-21 13:00:32,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:00:32,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:32,542 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:32,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 13:00:32,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:32,742 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:32,743 INFO L82 PathProgramCache]: Analyzing trace with hash -294282125, now seen corresponding path program 59 times [2021-08-21 13:00:32,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:32,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918348921] [2021-08-21 13:00:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:32,743 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:32,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:32,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918348921] [2021-08-21 13:00:32,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918348921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:32,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191908803] [2021-08-21 13:00:32,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:00:32,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:32,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:32,790 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:32,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 13:00:35,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 13:00:35,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:35,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:00:35,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:00:35,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191908803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:35,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:35,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-21 13:00:35,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791868696] [2021-08-21 13:00:35,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:00:35,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:35,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:00:35,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:00:35,100 INFO L87 Difference]: Start difference. First operand 86374 states and 332518 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-08-21 13:00:36,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:36,015 INFO L93 Difference]: Finished difference Result 114511 states and 429206 transitions. [2021-08-21 13:00:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:00:36,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 32 [2021-08-21 13:00:36,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:36,768 INFO L225 Difference]: With dead ends: 114511 [2021-08-21 13:00:36,768 INFO L226 Difference]: Without dead ends: 114511 [2021-08-21 13:00:36,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-08-21 13:00:36,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114511 states. [2021-08-21 13:00:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114511 to 65760. [2021-08-21 13:00:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65760 states, 65759 states have (on average 3.8164053589622715) internal successors, (250963), 65759 states have internal predecessors, (250963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:39,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65760 states to 65760 states and 250963 transitions. [2021-08-21 13:00:39,147 INFO L78 Accepts]: Start accepts. Automaton has 65760 states and 250963 transitions. Word has length 32 [2021-08-21 13:00:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:39,148 INFO L470 AbstractCegarLoop]: Abstraction has 65760 states and 250963 transitions. [2021-08-21 13:00:39,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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) [2021-08-21 13:00:39,148 INFO L276 IsEmpty]: Start isEmpty. Operand 65760 states and 250963 transitions. [2021-08-21 13:00:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:00:39,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:39,223 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:39,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-21 13:00:39,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:39,423 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:39,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:39,423 INFO L82 PathProgramCache]: Analyzing trace with hash 785955533, now seen corresponding path program 60 times [2021-08-21 13:00:39,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:39,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812863715] [2021-08-21 13:00:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:39,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:39,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:39,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812863715] [2021-08-21 13:00:39,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812863715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:39,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125865902] [2021-08-21 13:00:39,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 13:00:39,760 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:39,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:39,761 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:39,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 13:00:41,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 13:00:41,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:41,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:00:41,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:00:41,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125865902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:41,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:41,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-21 13:00:41,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210008411] [2021-08-21 13:00:41,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 13:00:41,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:41,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 13:00:41,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 13:00:41,919 INFO L87 Difference]: Start difference. First operand 65760 states and 250963 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:42,502 INFO L93 Difference]: Finished difference Result 73288 states and 274737 transitions. [2021-08-21 13:00:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 13:00:42,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 13:00:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:42,760 INFO L225 Difference]: With dead ends: 73288 [2021-08-21 13:00:42,760 INFO L226 Difference]: Without dead ends: 73270 [2021-08-21 13:00:42,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-21 13:00:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73270 states. [2021-08-21 13:00:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73270 to 65260. [2021-08-21 13:00:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65260 states, 65259 states have (on average 3.7991081689881856) internal successors, (247926), 65259 states have internal predecessors, (247926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65260 states to 65260 states and 247926 transitions. [2021-08-21 13:00:44,737 INFO L78 Accepts]: Start accepts. Automaton has 65260 states and 247926 transitions. Word has length 32 [2021-08-21 13:00:44,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:44,737 INFO L470 AbstractCegarLoop]: Abstraction has 65260 states and 247926 transitions. [2021-08-21 13:00:44,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:44,738 INFO L276 IsEmpty]: Start isEmpty. Operand 65260 states and 247926 transitions. [2021-08-21 13:00:44,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:00:44,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:44,816 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:44,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:45,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 13:00:45,017 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:45,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:45,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1387084889, now seen corresponding path program 61 times [2021-08-21 13:00:45,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:45,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384273705] [2021-08-21 13:00:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:45,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:00:45,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:45,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384273705] [2021-08-21 13:00:45,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384273705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:45,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95142000] [2021-08-21 13:00:45,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 13:00:45,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:45,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:45,056 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:45,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 13:00:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:47,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:00:47,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:47,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95142000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:47,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:47,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 13:00:47,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076194544] [2021-08-21 13:00:47,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:00:47,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:47,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:00:47,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:00:47,375 INFO L87 Difference]: Start difference. First operand 65260 states and 247926 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:48,841 INFO L93 Difference]: Finished difference Result 127469 states and 472422 transitions. [2021-08-21 13:00:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 13:00:48,842 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 13:00:48,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:49,691 INFO L225 Difference]: With dead ends: 127469 [2021-08-21 13:00:49,691 INFO L226 Difference]: Without dead ends: 127049 [2021-08-21 13:00:49,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=456, Invalid=1436, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 13:00:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127049 states. [2021-08-21 13:00:52,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127049 to 94842. [2021-08-21 13:00:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94842 states, 94841 states have (on average 3.829356501934817) internal successors, (363180), 94841 states have internal predecessors, (363180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94842 states to 94842 states and 363180 transitions. [2021-08-21 13:00:53,136 INFO L78 Accepts]: Start accepts. Automaton has 94842 states and 363180 transitions. Word has length 32 [2021-08-21 13:00:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:00:53,136 INFO L470 AbstractCegarLoop]: Abstraction has 94842 states and 363180 transitions. [2021-08-21 13:00:53,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:00:53,136 INFO L276 IsEmpty]: Start isEmpty. Operand 94842 states and 363180 transitions. [2021-08-21 13:00:53,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:00:53,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:00:53,614 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:00:53,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-21 13:00:53,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 13:00:53,817 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:00:53,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:00:53,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1344224781, now seen corresponding path program 62 times [2021-08-21 13:00:53,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:00:53,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884482393] [2021-08-21 13:00:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:00:53,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:00:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:00:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:00:53,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:00:53,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884482393] [2021-08-21 13:00:53,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884482393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:53,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966310015] [2021-08-21 13:00:53,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 13:00:53,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:00:53,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:00:53,852 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:00:53,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 13:00:55,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 13:00:55,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:00:55,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:00:55,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:00:56,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:00:56,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966310015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:00:56,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:00:56,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 13:00:56,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892575116] [2021-08-21 13:00:56,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:00:56,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:00:56,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:00:56,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:00:56,001 INFO L87 Difference]: Start difference. First operand 94842 states and 363180 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-08-21 13:00:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:00:56,904 INFO L93 Difference]: Finished difference Result 120396 states and 452631 transitions. [2021-08-21 13:00:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 13:00:56,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 32 [2021-08-21 13:00:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:00:57,411 INFO L225 Difference]: With dead ends: 120396 [2021-08-21 13:00:57,411 INFO L226 Difference]: Without dead ends: 120278 [2021-08-21 13:00:57,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 13:00:57,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120278 states. [2021-08-21 13:00:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120278 to 109140. [2021-08-21 13:01:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109140 states, 109139 states have (on average 3.8342205810938346) internal successors, (418463), 109139 states have internal predecessors, (418463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109140 states to 109140 states and 418463 transitions. [2021-08-21 13:01:00,842 INFO L78 Accepts]: Start accepts. Automaton has 109140 states and 418463 transitions. Word has length 32 [2021-08-21 13:01:00,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:00,842 INFO L470 AbstractCegarLoop]: Abstraction has 109140 states and 418463 transitions. [2021-08-21 13:01:00,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-08-21 13:01:00,842 INFO L276 IsEmpty]: Start isEmpty. Operand 109140 states and 418463 transitions. [2021-08-21 13:01:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 13:01:00,995 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:00,996 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:01,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:01,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:01,196 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:01:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:01,196 INFO L82 PathProgramCache]: Analyzing trace with hash -534326119, now seen corresponding path program 63 times [2021-08-21 13:01:01,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:01,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711811569] [2021-08-21 13:01:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:01,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 13:01:01,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:01,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711811569] [2021-08-21 13:01:01,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711811569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:01,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432907485] [2021-08-21 13:01:01,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 13:01:01,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:01,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:01,528 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:01,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 13:01:03,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 13:01:03,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:03,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:01:03,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:03,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:01:03,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432907485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:03,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:03,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-21 13:01:03,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302784653] [2021-08-21 13:01:03,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 13:01:03,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:03,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 13:01:03,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-21 13:01:03,541 INFO L87 Difference]: Start difference. First operand 109140 states and 418463 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:05,669 INFO L93 Difference]: Finished difference Result 155520 states and 568317 transitions. [2021-08-21 13:01:05,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-21 13:01:05,669 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-21 13:01:05,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:06,340 INFO L225 Difference]: With dead ends: 155520 [2021-08-21 13:01:06,341 INFO L226 Difference]: Without dead ends: 155466 [2021-08-21 13:01:06,341 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 890.4ms TimeCoverageRelationStatistics Valid=1309, Invalid=5011, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 13:01:06,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155466 states. [2021-08-21 13:01:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155466 to 109705. [2021-08-21 13:01:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109705 states, 109704 states have (on average 3.823178735506454) internal successors, (419418), 109704 states have internal predecessors, (419418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:10,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109705 states to 109705 states and 419418 transitions. [2021-08-21 13:01:10,685 INFO L78 Accepts]: Start accepts. Automaton has 109705 states and 419418 transitions. Word has length 32 [2021-08-21 13:01:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:10,686 INFO L470 AbstractCegarLoop]: Abstraction has 109705 states and 419418 transitions. [2021-08-21 13:01:10,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:10,686 INFO L276 IsEmpty]: Start isEmpty. Operand 109705 states and 419418 transitions. [2021-08-21 13:01:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:01:10,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:10,840 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:10,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 13:01:11,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 13:01:11,045 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:01:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:11,046 INFO L82 PathProgramCache]: Analyzing trace with hash 851154315, now seen corresponding path program 64 times [2021-08-21 13:01:11,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:11,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862953192] [2021-08-21 13:01:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:11,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:11,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:01:11,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:11,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862953192] [2021-08-21 13:01:11,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862953192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:11,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306822507] [2021-08-21 13:01:11,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 13:01:11,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:11,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:11,086 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:11,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 13:01:13,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 13:01:13,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:13,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 13:01:13,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 13:01:13,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306822507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:13,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:13,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-21 13:01:13,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608840803] [2021-08-21 13:01:13,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 13:01:13,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:13,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 13:01:13,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-21 13:01:13,402 INFO L87 Difference]: Start difference. First operand 109705 states and 419418 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:14,672 INFO L93 Difference]: Finished difference Result 156320 states and 595166 transitions. [2021-08-21 13:01:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 13:01:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:01:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 13:01:15,397 INFO L225 Difference]: With dead ends: 156320 [2021-08-21 13:01:15,398 INFO L226 Difference]: Without dead ends: 153804 [2021-08-21 13:01:15,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 13:01:15,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153804 states. [2021-08-21 13:01:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153804 to 147735. [2021-08-21 13:01:19,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147735 states, 147734 states have (on average 3.750896882234286) internal successors, (554135), 147734 states have internal predecessors, (554135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147735 states to 147735 states and 554135 transitions. [2021-08-21 13:01:20,531 INFO L78 Accepts]: Start accepts. Automaton has 147735 states and 554135 transitions. Word has length 33 [2021-08-21 13:01:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 13:01:20,531 INFO L470 AbstractCegarLoop]: Abstraction has 147735 states and 554135 transitions. [2021-08-21 13:01:20,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 147735 states and 554135 transitions. [2021-08-21 13:01:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 13:01:20,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 13:01:20,713 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 13:01:20,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-21 13:01:20,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:20,913 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 13:01:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 13:01:20,913 INFO L82 PathProgramCache]: Analyzing trace with hash -874131995, now seen corresponding path program 65 times [2021-08-21 13:01:20,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 13:01:20,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750055932] [2021-08-21 13:01:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 13:01:20,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 13:01:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 13:01:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 13:01:20,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 13:01:20,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750055932] [2021-08-21 13:01:20,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750055932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:20,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057868504] [2021-08-21 13:01:20,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 13:01:20,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 13:01:20,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 13:01:20,951 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 13:01:20,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 13:01:23,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 13:01:23,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 13:01:23,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 13:01:23,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 13:01:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-21 13:01:23,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057868504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 13:01:23,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 13:01:23,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-21 13:01:23,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577658031] [2021-08-21 13:01:23,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-21 13:01:23,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 13:01:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-21 13:01:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-21 13:01:23,343 INFO L87 Difference]: Start difference. First operand 147735 states and 554135 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 13:01:24,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 13:01:24,990 INFO L93 Difference]: Finished difference Result 214816 states and 794535 transitions. [2021-08-21 13:01:24,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 13:01:24,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-21 13:01:24,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted.