/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-more/sorted.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:33:53,758 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:33:53,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:33:53,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 15:33:53,863 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 [2021-08-06 15:33:53,898 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:33:53,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:33:53,898 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:33:53,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:33:53,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:33:53,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:33:53,902 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:33:53,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:33:53,902 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:33:53,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:33:53,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:33:53,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:33:53,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:33:53,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:33:53,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:33:53,904 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:33:53,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:33:53,904 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:33:53,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:33:53,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:33:53,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:33:53,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:33:53,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:33:53,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:33:53,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:33:53,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:33:53,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:33:53,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:33:53,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:33:53,906 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:33:53,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:33:53,906 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:33:54,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:33:54,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:33:54,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:33:54,243 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:33:54,244 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:33:54,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl [2021-08-06 15:33:54,245 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl' [2021-08-06 15:33:54,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:33:54,359 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:33:54,364 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:33:54,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:33:54,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:33:54,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:54" (1/1) ... [2021-08-06 15:33:54,381 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:54" (1/1) ... [2021-08-06 15:33:54,388 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:33:54,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:33:54,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:33:54,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:33:54,398 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:54" (1/1) ... [2021-08-06 15:33:54,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:54" (1/1) ... [2021-08-06 15:33:54,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:54" (1/1) ... [2021-08-06 15:33:54,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:54" (1/1) ... [2021-08-06 15:33:54,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:54" (1/1) ... [2021-08-06 15:33:54,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:54" (1/1) ... [2021-08-06 15:33:54,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:54" (1/1) ... [2021-08-06 15:33:54,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:33:54,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:33:54,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:33:54,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:33:54,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:54" (1/1) ... [2021-08-06 15:33:54,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:33:54,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:54,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-06 15:33:54,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-06 15:33:54,478 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:33:54,478 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:33:54,478 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:33:54,478 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:33:54,478 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:33:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:33:54,479 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:33:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:33:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:33:54,479 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 15:33:54,479 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 15:33:54,479 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 15:33:54,480 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 15:33:54,649 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:33:54,649 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 15:33:54,651 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:33:54 BoogieIcfgContainer [2021-08-06 15:33:54,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:33:54,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:33:54,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:33:54,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:33:54,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:33:54" (1/2) ... [2021-08-06 15:33:54,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9b8ecd and model type sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:33:54, skipping insertion in model container [2021-08-06 15:33:54,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:33:54" (2/2) ... [2021-08-06 15:33:54,657 INFO L111 eAbstractionObserver]: Analyzing ICFG sorted.wvr.bpl [2021-08-06 15:33:54,677 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:33:54,677 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:33:54,677 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:33:54,678 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:33:54,721 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 15:33:54,759 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:33:54,765 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-06 15:33:54,765 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 15:33:54,775 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-08-06 15:33:54,806 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 115 states, 114 states have (on average 2.763157894736842) internal successors, (315), 114 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 114 states have (on average 2.763157894736842) internal successors, (315), 114 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:54,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 15:33:54,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:54,818 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:33:54,818 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:54,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:54,823 INFO L82 PathProgramCache]: Analyzing trace with hash 490958584, now seen corresponding path program 1 times [2021-08-06 15:33:54,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:54,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253874215] [2021-08-06 15:33:54,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:54,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:55,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:55,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253874215] [2021-08-06 15:33:55,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253874215] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:33:55,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:33:55,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 15:33:55,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240071945] [2021-08-06 15:33:55,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:33:55,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:55,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:33:55,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:33:55,123 INFO L87 Difference]: Start difference. First operand has 115 states, 114 states have (on average 2.763157894736842) internal successors, (315), 114 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:55,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:55,193 INFO L93 Difference]: Finished difference Result 410 states and 1170 transitions. [2021-08-06 15:33:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:33:55,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 15:33:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:55,215 INFO L225 Difference]: With dead ends: 410 [2021-08-06 15:33:55,216 INFO L226 Difference]: Without dead ends: 395 [2021-08-06 15:33:55,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:33:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-08-06 15:33:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 152. [2021-08-06 15:33:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.794701986754967) internal successors, (422), 151 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 422 transitions. [2021-08-06 15:33:55,292 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 422 transitions. Word has length 21 [2021-08-06 15:33:55,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:55,297 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 422 transitions. [2021-08-06 15:33:55,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 422 transitions. [2021-08-06 15:33:55,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:33:55,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:55,299 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] [2021-08-06 15:33:55,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:33:55,300 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:55,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1995951880, now seen corresponding path program 1 times [2021-08-06 15:33:55,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:55,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097665688] [2021-08-06 15:33:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:55,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:55,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:55,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097665688] [2021-08-06 15:33:55,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097665688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:55,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649932365] [2021-08-06 15:33:55,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:55,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:55,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:55,436 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:55,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 15:33:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:55,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:33:55,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:55,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649932365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:55,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:55,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-06 15:33:55,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009506519] [2021-08-06 15:33:55,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:33:55,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:55,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:33:55,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:33:55,868 INFO L87 Difference]: Start difference. First operand 152 states and 422 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:56,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:56,154 INFO L93 Difference]: Finished difference Result 532 states and 1491 transitions. [2021-08-06 15:33:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:33:56,155 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:33:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:56,159 INFO L225 Difference]: With dead ends: 532 [2021-08-06 15:33:56,159 INFO L226 Difference]: Without dead ends: 532 [2021-08-06 15:33:56,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:33:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-06 15:33:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 165. [2021-08-06 15:33:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.8963414634146343) internal successors, (475), 164 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 475 transitions. [2021-08-06 15:33:56,172 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 475 transitions. Word has length 23 [2021-08-06 15:33:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:56,172 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 475 transitions. [2021-08-06 15:33:56,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:56,173 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 475 transitions. [2021-08-06 15:33:56,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:33:56,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:56,174 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] [2021-08-06 15:33:56,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:56,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:56,401 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:56,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:56,402 INFO L82 PathProgramCache]: Analyzing trace with hash -537129352, now seen corresponding path program 2 times [2021-08-06 15:33:56,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:56,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055621035] [2021-08-06 15:33:56,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:56,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:56,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:56,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:56,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055621035] [2021-08-06 15:33:56,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055621035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:56,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621148950] [2021-08-06 15:33:56,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:33:56,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:56,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:56,507 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:56,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 15:33:56,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:33:56,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:56,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:33:56,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:56,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:56,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621148950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:56,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:56,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-06 15:33:56,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466420001] [2021-08-06 15:33:56,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:33:56,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:56,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:33:56,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:33:56,904 INFO L87 Difference]: Start difference. First operand 165 states and 475 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:57,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:57,236 INFO L93 Difference]: Finished difference Result 565 states and 1578 transitions. [2021-08-06 15:33:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:33:57,241 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 23 [2021-08-06 15:33:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:57,247 INFO L225 Difference]: With dead ends: 565 [2021-08-06 15:33:57,248 INFO L226 Difference]: Without dead ends: 565 [2021-08-06 15:33:57,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:33:57,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-08-06 15:33:57,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 166. [2021-08-06 15:33:57,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.878787878787879) internal successors, (475), 165 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 475 transitions. [2021-08-06 15:33:57,263 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 475 transitions. Word has length 23 [2021-08-06 15:33:57,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:57,263 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 475 transitions. [2021-08-06 15:33:57,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:57,263 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 475 transitions. [2021-08-06 15:33:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:33:57,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:57,268 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] [2021-08-06 15:33:57,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:57,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-06 15:33:57,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:57,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:57,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1191055450, now seen corresponding path program 1 times [2021-08-06 15:33:57,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:57,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496002840] [2021-08-06 15:33:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:57,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:57,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:57,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496002840] [2021-08-06 15:33:57,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496002840] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:33:57,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:33:57,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 15:33:57,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307050492] [2021-08-06 15:33:57,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:33:57,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:57,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:33:57,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:33:57,550 INFO L87 Difference]: Start difference. First operand 166 states and 475 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:57,632 INFO L93 Difference]: Finished difference Result 302 states and 837 transitions. [2021-08-06 15:33:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:33:57,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:33:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:57,635 INFO L225 Difference]: With dead ends: 302 [2021-08-06 15:33:57,635 INFO L226 Difference]: Without dead ends: 291 [2021-08-06 15:33:57,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:33:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-08-06 15:33:57,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 219. [2021-08-06 15:33:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.876146788990826) internal successors, (627), 218 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 627 transitions. [2021-08-06 15:33:57,647 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 627 transitions. Word has length 23 [2021-08-06 15:33:57,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:57,647 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 627 transitions. [2021-08-06 15:33:57,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 627 transitions. [2021-08-06 15:33:57,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:33:57,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:57,649 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] [2021-08-06 15:33:57,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 15:33:57,649 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:57,650 INFO L82 PathProgramCache]: Analyzing trace with hash 617689242, now seen corresponding path program 1 times [2021-08-06 15:33:57,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:57,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028609110] [2021-08-06 15:33:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:57,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:57,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:57,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028609110] [2021-08-06 15:33:57,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028609110] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:33:57,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:33:57,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 15:33:57,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120827045] [2021-08-06 15:33:57,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:33:57,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:33:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:33:57,694 INFO L87 Difference]: Start difference. First operand 219 states and 627 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:57,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:57,753 INFO L93 Difference]: Finished difference Result 341 states and 932 transitions. [2021-08-06 15:33:57,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:33:57,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:33:57,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:57,757 INFO L225 Difference]: With dead ends: 341 [2021-08-06 15:33:57,757 INFO L226 Difference]: Without dead ends: 328 [2021-08-06 15:33:57,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:33:57,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-08-06 15:33:57,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 249. [2021-08-06 15:33:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.879032258064516) internal successors, (714), 248 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 714 transitions. [2021-08-06 15:33:57,768 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 714 transitions. Word has length 23 [2021-08-06 15:33:57,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:57,768 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 714 transitions. [2021-08-06 15:33:57,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:57,769 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 714 transitions. [2021-08-06 15:33:57,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:33:57,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:57,770 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] [2021-08-06 15:33:57,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 15:33:57,770 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:57,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:57,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1700490254, now seen corresponding path program 2 times [2021-08-06 15:33:57,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:57,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125796368] [2021-08-06 15:33:57,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:57,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:57,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:57,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125796368] [2021-08-06 15:33:57,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125796368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:57,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699988933] [2021-08-06 15:33:57,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:33:57,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:57,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:57,826 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:57,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 15:33:57,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:33:57,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:57,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:33:57,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:58,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699988933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:58,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:58,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-06 15:33:58,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808550146] [2021-08-06 15:33:58,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:33:58,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:58,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:33:58,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:33:58,134 INFO L87 Difference]: Start difference. First operand 249 states and 714 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:58,195 INFO L93 Difference]: Finished difference Result 311 states and 872 transitions. [2021-08-06 15:33:58,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:33:58,195 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:33:58,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:58,197 INFO L225 Difference]: With dead ends: 311 [2021-08-06 15:33:58,197 INFO L226 Difference]: Without dead ends: 311 [2021-08-06 15:33:58,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:33:58,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-08-06 15:33:58,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 231. [2021-08-06 15:33:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.856521739130435) internal successors, (657), 230 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:58,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 657 transitions. [2021-08-06 15:33:58,207 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 657 transitions. Word has length 23 [2021-08-06 15:33:58,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:58,207 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 657 transitions. [2021-08-06 15:33:58,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:58,208 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 657 transitions. [2021-08-06 15:33:58,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:33:58,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:58,208 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] [2021-08-06 15:33:58,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:58,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:58,432 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:58,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:58,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1103495950, now seen corresponding path program 3 times [2021-08-06 15:33:58,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:58,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887604227] [2021-08-06 15:33:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:58,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:58,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:58,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887604227] [2021-08-06 15:33:58,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887604227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:58,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079174252] [2021-08-06 15:33:58,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:33:58,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:58,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:58,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:33:58,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 15:33:58,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:33:58,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:58,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:33:58,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:58,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079174252] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:58,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:58,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-08-06 15:33:58,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832075988] [2021-08-06 15:33:58,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:33:58,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:58,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:33:58,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:33:58,807 INFO L87 Difference]: Start difference. First operand 231 states and 657 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:59,017 INFO L93 Difference]: Finished difference Result 520 states and 1433 transitions. [2021-08-06 15:33:59,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:33:59,018 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:33:59,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:59,021 INFO L225 Difference]: With dead ends: 520 [2021-08-06 15:33:59,021 INFO L226 Difference]: Without dead ends: 520 [2021-08-06 15:33:59,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:33:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-08-06 15:33:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 231. [2021-08-06 15:33:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.856521739130435) internal successors, (657), 230 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 657 transitions. [2021-08-06 15:33:59,032 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 657 transitions. Word has length 23 [2021-08-06 15:33:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:59,033 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 657 transitions. [2021-08-06 15:33:59,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 657 transitions. [2021-08-06 15:33:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:33:59,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:59,035 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] [2021-08-06 15:33:59,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:59,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:59,262 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:59,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:59,262 INFO L82 PathProgramCache]: Analyzing trace with hash -512553250, now seen corresponding path program 2 times [2021-08-06 15:33:59,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:59,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912109383] [2021-08-06 15:33:59,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:59,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:59,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:59,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912109383] [2021-08-06 15:33:59,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912109383] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:33:59,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:33:59,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 15:33:59,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865430031] [2021-08-06 15:33:59,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:33:59,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:33:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:33:59,353 INFO L87 Difference]: Start difference. First operand 231 states and 657 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:59,392 INFO L93 Difference]: Finished difference Result 253 states and 731 transitions. [2021-08-06 15:33:59,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:33:59,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:33:59,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:59,394 INFO L225 Difference]: With dead ends: 253 [2021-08-06 15:33:59,394 INFO L226 Difference]: Without dead ends: 253 [2021-08-06 15:33:59,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:33:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-06 15:33:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 209. [2021-08-06 15:33:59,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.889423076923077) internal successors, (601), 208 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 601 transitions. [2021-08-06 15:33:59,401 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 601 transitions. Word has length 23 [2021-08-06 15:33:59,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:59,401 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 601 transitions. [2021-08-06 15:33:59,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 601 transitions. [2021-08-06 15:33:59,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:33:59,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:59,402 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] [2021-08-06 15:33:59,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 15:33:59,403 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:59,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:59,403 INFO L82 PathProgramCache]: Analyzing trace with hash -487420814, now seen corresponding path program 3 times [2021-08-06 15:33:59,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:59,403 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549300629] [2021-08-06 15:33:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:59,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:59,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:59,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549300629] [2021-08-06 15:33:59,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549300629] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:33:59,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:33:59,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 15:33:59,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859772036] [2021-08-06 15:33:59,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:33:59,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:59,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:33:59,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:33:59,456 INFO L87 Difference]: Start difference. First operand 209 states and 601 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:59,511 INFO L93 Difference]: Finished difference Result 240 states and 689 transitions. [2021-08-06 15:33:59,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:33:59,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:33:59,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:59,513 INFO L225 Difference]: With dead ends: 240 [2021-08-06 15:33:59,513 INFO L226 Difference]: Without dead ends: 240 [2021-08-06 15:33:59,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:33:59,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-08-06 15:33:59,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 178. [2021-08-06 15:33:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.8587570621468927) internal successors, (506), 177 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 506 transitions. [2021-08-06 15:33:59,520 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 506 transitions. Word has length 23 [2021-08-06 15:33:59,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:59,521 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 506 transitions. [2021-08-06 15:33:59,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 506 transitions. [2021-08-06 15:33:59,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:33:59,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:59,522 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] [2021-08-06 15:33:59,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 15:33:59,522 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:59,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:59,522 INFO L82 PathProgramCache]: Analyzing trace with hash -371034514, now seen corresponding path program 4 times [2021-08-06 15:33:59,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:59,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036951484] [2021-08-06 15:33:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:59,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:59,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:59,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036951484] [2021-08-06 15:33:59,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036951484] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:33:59,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:33:59,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 15:33:59,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474525746] [2021-08-06 15:33:59,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:33:59,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:59,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:33:59,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:33:59,573 INFO L87 Difference]: Start difference. First operand 178 states and 506 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:59,638 INFO L93 Difference]: Finished difference Result 255 states and 720 transitions. [2021-08-06 15:33:59,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:33:59,639 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:33:59,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:59,641 INFO L225 Difference]: With dead ends: 255 [2021-08-06 15:33:59,641 INFO L226 Difference]: Without dead ends: 251 [2021-08-06 15:33:59,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:33:59,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-06 15:33:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 178. [2021-08-06 15:33:59,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.847457627118644) internal successors, (504), 177 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 504 transitions. [2021-08-06 15:33:59,647 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 504 transitions. Word has length 23 [2021-08-06 15:33:59,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:59,647 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 504 transitions. [2021-08-06 15:33:59,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 504 transitions. [2021-08-06 15:33:59,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:33:59,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:59,648 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] [2021-08-06 15:33:59,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-06 15:33:59,649 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:59,649 INFO L82 PathProgramCache]: Analyzing trace with hash 902321774, now seen corresponding path program 5 times [2021-08-06 15:33:59,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:59,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222829579] [2021-08-06 15:33:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:59,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:59,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:59,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222829579] [2021-08-06 15:33:59,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222829579] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:33:59,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:33:59,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 15:33:59,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501100312] [2021-08-06 15:33:59,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:33:59,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:59,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:33:59,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:33:59,706 INFO L87 Difference]: Start difference. First operand 178 states and 504 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:59,797 INFO L93 Difference]: Finished difference Result 331 states and 903 transitions. [2021-08-06 15:33:59,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:33:59,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:33:59,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:59,799 INFO L225 Difference]: With dead ends: 331 [2021-08-06 15:33:59,799 INFO L226 Difference]: Without dead ends: 327 [2021-08-06 15:33:59,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:33:59,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-08-06 15:33:59,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 198. [2021-08-06 15:33:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.83248730964467) internal successors, (558), 197 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 558 transitions. [2021-08-06 15:33:59,806 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 558 transitions. Word has length 23 [2021-08-06 15:33:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:59,806 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 558 transitions. [2021-08-06 15:33:59,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 558 transitions. [2021-08-06 15:33:59,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 15:33:59,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:59,807 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] [2021-08-06 15:33:59,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-06 15:33:59,807 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:59,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:59,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1880879218, now seen corresponding path program 6 times [2021-08-06 15:33:59,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:59,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72054728] [2021-08-06 15:33:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:59,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:33:59,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:59,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72054728] [2021-08-06 15:33:59,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72054728] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:33:59,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:33:59,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 15:33:59,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903087891] [2021-08-06 15:33:59,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:33:59,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:59,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:33:59,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:33:59,872 INFO L87 Difference]: Start difference. First operand 198 states and 558 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:00,002 INFO L93 Difference]: Finished difference Result 313 states and 871 transitions. [2021-08-06 15:34:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:34:00,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 15:34:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:00,005 INFO L225 Difference]: With dead ends: 313 [2021-08-06 15:34:00,005 INFO L226 Difference]: Without dead ends: 313 [2021-08-06 15:34:00,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:34:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-06 15:34:00,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 182. [2021-08-06 15:34:00,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.839779005524862) internal successors, (514), 181 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:00,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 514 transitions. [2021-08-06 15:34:00,010 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 514 transitions. Word has length 23 [2021-08-06 15:34:00,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:00,011 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 514 transitions. [2021-08-06 15:34:00,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:00,011 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 514 transitions. [2021-08-06 15:34:00,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:34:00,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:00,012 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, 1, 1] [2021-08-06 15:34:00,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-06 15:34:00,012 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:00,012 INFO L82 PathProgramCache]: Analyzing trace with hash 787213722, now seen corresponding path program 1 times [2021-08-06 15:34:00,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:00,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153947353] [2021-08-06 15:34:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:00,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:00,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:00,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153947353] [2021-08-06 15:34:00,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153947353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:00,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849261796] [2021-08-06 15:34:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:00,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:00,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:00,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:00,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 15:34:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:00,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 15:34:00,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:01,251 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 15:34:01,252 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 53 treesize of output 57 [2021-08-06 15:34:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:01,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849261796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:01,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:01,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:34:01,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373799089] [2021-08-06 15:34:01,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:34:01,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:01,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:34:01,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:34:01,863 INFO L87 Difference]: Start difference. First operand 182 states and 514 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:02,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:02,672 INFO L93 Difference]: Finished difference Result 545 states and 1590 transitions. [2021-08-06 15:34:02,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:34:02,672 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 15:34:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:02,675 INFO L225 Difference]: With dead ends: 545 [2021-08-06 15:34:02,675 INFO L226 Difference]: Without dead ends: 515 [2021-08-06 15:34:02,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 822.3ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:34:02,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-08-06 15:34:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 236. [2021-08-06 15:34:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.948936170212766) internal successors, (693), 235 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 693 transitions. [2021-08-06 15:34:02,684 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 693 transitions. Word has length 25 [2021-08-06 15:34:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:02,684 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 693 transitions. [2021-08-06 15:34:02,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 693 transitions. [2021-08-06 15:34:02,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:34:02,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:02,685 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, 1, 1] [2021-08-06 15:34:02,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:02,909 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,SelfDestructingSolverStorable12 [2021-08-06 15:34:02,909 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:02,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:02,910 INFO L82 PathProgramCache]: Analyzing trace with hash 793834374, now seen corresponding path program 2 times [2021-08-06 15:34:02,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:02,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673649431] [2021-08-06 15:34:02,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:02,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:03,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:03,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:03,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673649431] [2021-08-06 15:34:03,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673649431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:03,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865993528] [2021-08-06 15:34:03,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:03,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:03,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:03,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:03,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 15:34:03,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:03,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:03,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:34:03,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:03,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:34:03,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:34:04,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:34:04,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 51 [2021-08-06 15:34:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:04,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865993528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:04,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:04,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:34:04,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166260388] [2021-08-06 15:34:04,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:34:04,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:04,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:34:04,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:34:04,537 INFO L87 Difference]: Start difference. First operand 236 states and 693 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:05,771 INFO L93 Difference]: Finished difference Result 697 states and 2045 transitions. [2021-08-06 15:34:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:34:05,772 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 15:34:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:05,775 INFO L225 Difference]: With dead ends: 697 [2021-08-06 15:34:05,776 INFO L226 Difference]: Without dead ends: 682 [2021-08-06 15:34:05,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1125.6ms TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:34:05,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-08-06 15:34:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 256. [2021-08-06 15:34:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.011764705882353) internal successors, (768), 255 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 768 transitions. [2021-08-06 15:34:05,788 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 768 transitions. Word has length 25 [2021-08-06 15:34:05,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:05,788 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 768 transitions. [2021-08-06 15:34:05,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:05,788 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 768 transitions. [2021-08-06 15:34:05,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:34:05,797 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:05,797 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, 1, 1] [2021-08-06 15:34:05,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:06,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:06,017 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:06,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:06,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1797808250, now seen corresponding path program 3 times [2021-08-06 15:34:06,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:06,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118895713] [2021-08-06 15:34:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:06,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:06,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:06,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118895713] [2021-08-06 15:34:06,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118895713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:06,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716751299] [2021-08-06 15:34:06,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:06,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:06,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:06,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:06,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 15:34:06,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:34:06,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:06,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-06 15:34:06,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:07,537 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:34:07,538 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 51 treesize of output 37 [2021-08-06 15:34:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:07,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716751299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:07,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:07,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 15:34:07,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156945776] [2021-08-06 15:34:07,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:34:07,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:07,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:34:07,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:34:07,680 INFO L87 Difference]: Start difference. First operand 256 states and 768 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:08,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:08,074 INFO L93 Difference]: Finished difference Result 450 states and 1268 transitions. [2021-08-06 15:34:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:34:08,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 15:34:08,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:08,077 INFO L225 Difference]: With dead ends: 450 [2021-08-06 15:34:08,078 INFO L226 Difference]: Without dead ends: 435 [2021-08-06 15:34:08,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 490.3ms TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:34:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-08-06 15:34:08,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 280. [2021-08-06 15:34:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.96415770609319) internal successors, (827), 279 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 827 transitions. [2021-08-06 15:34:08,086 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 827 transitions. Word has length 25 [2021-08-06 15:34:08,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:08,087 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 827 transitions. [2021-08-06 15:34:08,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 827 transitions. [2021-08-06 15:34:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:34:08,088 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:08,088 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, 1, 1] [2021-08-06 15:34:08,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:08,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:08,289 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:08,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:08,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2000318264, now seen corresponding path program 4 times [2021-08-06 15:34:08,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:08,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55141239] [2021-08-06 15:34:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:08,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:08,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:08,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55141239] [2021-08-06 15:34:08,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55141239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:08,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388117531] [2021-08-06 15:34:08,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:34:08,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:08,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:08,814 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:08,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 15:34:09,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:34:09,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:09,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:34:09,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:09,618 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 25 [2021-08-06 15:34:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:09,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388117531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:09,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:09,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 15:34:09,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793957880] [2021-08-06 15:34:09,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:34:09,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:09,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:34:09,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:34:09,833 INFO L87 Difference]: Start difference. First operand 280 states and 827 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-08-06 15:34:10,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:10,113 INFO L93 Difference]: Finished difference Result 406 states and 1141 transitions. [2021-08-06 15:34:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:34:10,114 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 [2021-08-06 15:34:10,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:10,117 INFO L225 Difference]: With dead ends: 406 [2021-08-06 15:34:10,117 INFO L226 Difference]: Without dead ends: 391 [2021-08-06 15:34:10,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 396.7ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:34:10,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-06 15:34:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 274. [2021-08-06 15:34:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9523809523809526) internal successors, (806), 273 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 806 transitions. [2021-08-06 15:34:10,131 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 806 transitions. Word has length 25 [2021-08-06 15:34:10,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:10,131 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 806 transitions. [2021-08-06 15:34:10,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-08-06 15:34:10,131 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 806 transitions. [2021-08-06 15:34:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:34:10,132 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:10,132 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, 1, 1] [2021-08-06 15:34:10,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:10,348 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,SelfDestructingSolverStorable15 [2021-08-06 15:34:10,349 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:10,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1301450086, now seen corresponding path program 1 times [2021-08-06 15:34:10,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:10,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592386997] [2021-08-06 15:34:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:10,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:10,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:10,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592386997] [2021-08-06 15:34:10,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592386997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:10,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236101676] [2021-08-06 15:34:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:10,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:10,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:10,467 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:10,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 15:34:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:10,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:34:10,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:11,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 25 [2021-08-06 15:34:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:11,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236101676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:11,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:11,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 15:34:11,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637716544] [2021-08-06 15:34:11,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:11,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:11,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:11,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:11,374 INFO L87 Difference]: Start difference. First operand 274 states and 806 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:11,429 INFO L93 Difference]: Finished difference Result 469 states and 1371 transitions. [2021-08-06 15:34:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:34:11,430 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 15:34:11,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:11,437 INFO L225 Difference]: With dead ends: 469 [2021-08-06 15:34:11,437 INFO L226 Difference]: Without dead ends: 454 [2021-08-06 15:34:11,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-06 15:34:11,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 306. [2021-08-06 15:34:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.944262295081967) internal successors, (898), 305 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 898 transitions. [2021-08-06 15:34:11,447 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 898 transitions. Word has length 25 [2021-08-06 15:34:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:11,448 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 898 transitions. [2021-08-06 15:34:11,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:11,448 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 898 transitions. [2021-08-06 15:34:11,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:34:11,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:11,449 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, 1, 1] [2021-08-06 15:34:11,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:11,660 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,SelfDestructingSolverStorable16 [2021-08-06 15:34:11,661 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:11,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:11,661 INFO L82 PathProgramCache]: Analyzing trace with hash -262339302, now seen corresponding path program 2 times [2021-08-06 15:34:11,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:11,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837526319] [2021-08-06 15:34:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:11,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:11,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:11,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837526319] [2021-08-06 15:34:11,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837526319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:11,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261888908] [2021-08-06 15:34:11,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:11,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:11,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:11,801 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:11,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 15:34:12,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:12,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:12,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 15:34:12,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:12,523 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 25 [2021-08-06 15:34:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:12,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261888908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:12,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:12,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-06 15:34:12,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313996228] [2021-08-06 15:34:12,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:34:12,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:12,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:34:12,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:12,700 INFO L87 Difference]: Start difference. First operand 306 states and 898 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:12,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:12,792 INFO L93 Difference]: Finished difference Result 491 states and 1441 transitions. [2021-08-06 15:34:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:34:12,792 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 15:34:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:12,794 INFO L225 Difference]: With dead ends: 491 [2021-08-06 15:34:12,794 INFO L226 Difference]: Without dead ends: 476 [2021-08-06 15:34:12,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:34:12,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-08-06 15:34:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 312. [2021-08-06 15:34:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.945337620578778) internal successors, (916), 311 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:12,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 916 transitions. [2021-08-06 15:34:12,804 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 916 transitions. Word has length 25 [2021-08-06 15:34:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:12,804 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 916 transitions. [2021-08-06 15:34:12,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 916 transitions. [2021-08-06 15:34:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:12,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:12,805 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, 1, 1] [2021-08-06 15:34:12,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:13,028 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,SelfDestructingSolverStorable17 [2021-08-06 15:34:13,029 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:13,029 INFO L82 PathProgramCache]: Analyzing trace with hash -355268164, now seen corresponding path program 5 times [2021-08-06 15:34:13,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:13,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308488176] [2021-08-06 15:34:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:13,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:13,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:13,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308488176] [2021-08-06 15:34:13,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308488176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:13,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573956360] [2021-08-06 15:34:13,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:13,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:13,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:13,125 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:13,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 15:34:13,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:34:13,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:13,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:13,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:13,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573956360] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:13,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:13,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:34:13,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663152324] [2021-08-06 15:34:13,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:34:13,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:13,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:34:13,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:34:13,775 INFO L87 Difference]: Start difference. First operand 312 states and 916 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:13,930 INFO L93 Difference]: Finished difference Result 446 states and 1312 transitions. [2021-08-06 15:34:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:34:13,931 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:34:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:13,932 INFO L225 Difference]: With dead ends: 446 [2021-08-06 15:34:13,932 INFO L226 Difference]: Without dead ends: 446 [2021-08-06 15:34:13,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:34:13,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-08-06 15:34:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 370. [2021-08-06 15:34:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.035230352303523) internal successors, (1120), 369 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1120 transitions. [2021-08-06 15:34:13,943 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1120 transitions. Word has length 27 [2021-08-06 15:34:13,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:13,943 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1120 transitions. [2021-08-06 15:34:13,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:13,943 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1120 transitions. [2021-08-06 15:34:13,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:13,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:13,944 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, 1, 1] [2021-08-06 15:34:13,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:14,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:14,180 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:14,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:14,181 INFO L82 PathProgramCache]: Analyzing trace with hash 528786936, now seen corresponding path program 6 times [2021-08-06 15:34:14,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:14,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988041933] [2021-08-06 15:34:14,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:14,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:14,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:14,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988041933] [2021-08-06 15:34:14,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988041933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:14,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258783363] [2021-08-06 15:34:14,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:14,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:14,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:14,250 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:14,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 15:34:14,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:34:14,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:14,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:14,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:14,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258783363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:14,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:14,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:34:14,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136547461] [2021-08-06 15:34:14,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:34:14,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:14,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:34:14,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:34:14,892 INFO L87 Difference]: Start difference. First operand 370 states and 1120 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:15,357 INFO L93 Difference]: Finished difference Result 1017 states and 2828 transitions. [2021-08-06 15:34:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:34:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-08-06 15:34:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:15,361 INFO L225 Difference]: With dead ends: 1017 [2021-08-06 15:34:15,361 INFO L226 Difference]: Without dead ends: 1017 [2021-08-06 15:34:15,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:34:15,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-08-06 15:34:15,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 409. [2021-08-06 15:34:15,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.1151960784313726) internal successors, (1271), 408 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1271 transitions. [2021-08-06 15:34:15,377 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1271 transitions. Word has length 27 [2021-08-06 15:34:15,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:15,377 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1271 transitions. [2021-08-06 15:34:15,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1271 transitions. [2021-08-06 15:34:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:15,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:15,379 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, 1, 1, 1, 1] [2021-08-06 15:34:15,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:15,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:15,601 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:15,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1851035324, now seen corresponding path program 1 times [2021-08-06 15:34:15,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:15,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097798491] [2021-08-06 15:34:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:15,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:15,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:15,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:15,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097798491] [2021-08-06 15:34:15,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097798491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:15,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018589712] [2021-08-06 15:34:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:15,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:15,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:15,673 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:15,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 15:34:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:16,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:34:16,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:16,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018589712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:16,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:16,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 15:34:16,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141191707] [2021-08-06 15:34:16,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:34:16,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:16,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:34:16,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:34:16,299 INFO L87 Difference]: Start difference. First operand 409 states and 1271 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:16,545 INFO L93 Difference]: Finished difference Result 838 states and 2442 transitions. [2021-08-06 15:34:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:34:16,545 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2021-08-06 15:34:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:16,549 INFO L225 Difference]: With dead ends: 838 [2021-08-06 15:34:16,549 INFO L226 Difference]: Without dead ends: 832 [2021-08-06 15:34:16,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:34:16,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-08-06 15:34:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 522. [2021-08-06 15:34:16,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.1861804222648753) internal successors, (1660), 521 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1660 transitions. [2021-08-06 15:34:16,563 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1660 transitions. Word has length 27 [2021-08-06 15:34:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:16,563 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1660 transitions. [2021-08-06 15:34:16,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1660 transitions. [2021-08-06 15:34:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:16,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:16,573 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, 1, 1, 1, 1] [2021-08-06 15:34:16,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:16,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-06 15:34:16,788 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:16,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1119729636, now seen corresponding path program 2 times [2021-08-06 15:34:16,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:16,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815107104] [2021-08-06 15:34:16,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:16,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:16,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:16,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:16,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:16,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815107104] [2021-08-06 15:34:16,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815107104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:16,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503095575] [2021-08-06 15:34:16,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:16,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:16,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:16,868 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:16,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 15:34:17,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:17,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:17,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:34:17,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:17,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503095575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:17,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:17,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 15:34:17,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679707851] [2021-08-06 15:34:17,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:34:17,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:17,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:34:17,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:34:17,541 INFO L87 Difference]: Start difference. First operand 522 states and 1660 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:17,794 INFO L93 Difference]: Finished difference Result 905 states and 2647 transitions. [2021-08-06 15:34:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:34:17,794 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2021-08-06 15:34:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:17,798 INFO L225 Difference]: With dead ends: 905 [2021-08-06 15:34:17,798 INFO L226 Difference]: Without dead ends: 905 [2021-08-06 15:34:17,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:34:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-08-06 15:34:17,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 524. [2021-08-06 15:34:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1720841300191203) internal successors, (1659), 523 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1659 transitions. [2021-08-06 15:34:17,813 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1659 transitions. Word has length 27 [2021-08-06 15:34:17,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:17,813 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1659 transitions. [2021-08-06 15:34:17,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1659 transitions. [2021-08-06 15:34:17,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:17,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:17,815 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, 1, 1] [2021-08-06 15:34:17,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:18,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:18,029 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:18,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:18,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1261248372, now seen corresponding path program 7 times [2021-08-06 15:34:18,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:18,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797940096] [2021-08-06 15:34:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:18,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:18,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:18,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797940096] [2021-08-06 15:34:18,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797940096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:18,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384643773] [2021-08-06 15:34:18,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:18,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:18,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:18,096 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:18,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 15:34:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:18,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:18,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:18,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384643773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:18,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:18,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:34:18,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698833326] [2021-08-06 15:34:18,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:34:18,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:18,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:34:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:34:18,831 INFO L87 Difference]: Start difference. First operand 524 states and 1659 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:19,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:19,214 INFO L93 Difference]: Finished difference Result 1149 states and 3311 transitions. [2021-08-06 15:34:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:34:19,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-08-06 15:34:19,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:19,219 INFO L225 Difference]: With dead ends: 1149 [2021-08-06 15:34:19,219 INFO L226 Difference]: Without dead ends: 1145 [2021-08-06 15:34:19,220 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:34:19,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-08-06 15:34:19,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 528. [2021-08-06 15:34:19,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.159392789373814) internal successors, (1665), 527 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1665 transitions. [2021-08-06 15:34:19,237 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1665 transitions. Word has length 27 [2021-08-06 15:34:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:19,237 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1665 transitions. [2021-08-06 15:34:19,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:19,237 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1665 transitions. [2021-08-06 15:34:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:19,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:19,239 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, 1, 1, 1, 1] [2021-08-06 15:34:19,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:19,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:19,453 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:19,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:19,453 INFO L82 PathProgramCache]: Analyzing trace with hash 676830496, now seen corresponding path program 3 times [2021-08-06 15:34:19,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:19,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2467758] [2021-08-06 15:34:19,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:19,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:19,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:19,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2467758] [2021-08-06 15:34:19,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2467758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:19,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429933376] [2021-08-06 15:34:19,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:19,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:19,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:19,513 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:19,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 15:34:20,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:34:20,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:20,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:34:20,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:20,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429933376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:20,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:20,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 15:34:20,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212689155] [2021-08-06 15:34:20,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:34:20,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:20,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:34:20,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:34:20,226 INFO L87 Difference]: Start difference. First operand 528 states and 1665 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:20,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:20,385 INFO L93 Difference]: Finished difference Result 751 states and 2328 transitions. [2021-08-06 15:34:20,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:34:20,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2021-08-06 15:34:20,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:20,388 INFO L225 Difference]: With dead ends: 751 [2021-08-06 15:34:20,388 INFO L226 Difference]: Without dead ends: 751 [2021-08-06 15:34:20,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:34:20,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-08-06 15:34:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 540. [2021-08-06 15:34:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 3.1521335807050095) internal successors, (1699), 539 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:20,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1699 transitions. [2021-08-06 15:34:20,401 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1699 transitions. Word has length 27 [2021-08-06 15:34:20,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:20,401 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 1699 transitions. [2021-08-06 15:34:20,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:20,401 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1699 transitions. [2021-08-06 15:34:20,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:20,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:20,403 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, 1, 1] [2021-08-06 15:34:20,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:20,629 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,SelfDestructingSolverStorable23 [2021-08-06 15:34:20,629 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:20,629 INFO L82 PathProgramCache]: Analyzing trace with hash -962838664, now seen corresponding path program 8 times [2021-08-06 15:34:20,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:20,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929877439] [2021-08-06 15:34:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:20,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:20,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:20,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:20,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929877439] [2021-08-06 15:34:20,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929877439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:20,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903926632] [2021-08-06 15:34:20,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:20,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:20,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:20,693 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:20,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 15:34:21,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:21,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:21,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:21,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903926632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:21,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:21,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:34:21,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325983458] [2021-08-06 15:34:21,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:34:21,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:21,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:34:21,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:34:21,371 INFO L87 Difference]: Start difference. First operand 540 states and 1699 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:21,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:21,623 INFO L93 Difference]: Finished difference Result 983 states and 2946 transitions. [2021-08-06 15:34:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:34:21,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:34:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:21,626 INFO L225 Difference]: With dead ends: 983 [2021-08-06 15:34:21,626 INFO L226 Difference]: Without dead ends: 971 [2021-08-06 15:34:21,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 152.3ms TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:34:21,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-08-06 15:34:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 558. [2021-08-06 15:34:21,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.1382405745062836) internal successors, (1748), 557 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1748 transitions. [2021-08-06 15:34:21,647 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1748 transitions. Word has length 27 [2021-08-06 15:34:21,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:21,647 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 1748 transitions. [2021-08-06 15:34:21,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:21,648 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1748 transitions. [2021-08-06 15:34:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:21,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:21,649 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, 1, 1] [2021-08-06 15:34:21,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:21,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:21,849 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:21,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:21,850 INFO L82 PathProgramCache]: Analyzing trace with hash 924286196, now seen corresponding path program 9 times [2021-08-06 15:34:21,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:21,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359815074] [2021-08-06 15:34:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:21,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:21,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:21,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359815074] [2021-08-06 15:34:21,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359815074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:21,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395744748] [2021-08-06 15:34:21,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:21,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:21,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:21,918 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:21,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 15:34:22,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:34:22,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:22,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:22,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:22,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395744748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:22,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:22,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:34:22,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66109375] [2021-08-06 15:34:22,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:34:22,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:22,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:34:22,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:34:22,663 INFO L87 Difference]: Start difference. First operand 558 states and 1748 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:22,856 INFO L93 Difference]: Finished difference Result 983 states and 2948 transitions. [2021-08-06 15:34:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:34:22,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:34:22,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:22,859 INFO L225 Difference]: With dead ends: 983 [2021-08-06 15:34:22,859 INFO L226 Difference]: Without dead ends: 983 [2021-08-06 15:34:22,860 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:34:22,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-08-06 15:34:22,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 567. [2021-08-06 15:34:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.1696113074204946) internal successors, (1794), 566 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1794 transitions. [2021-08-06 15:34:22,874 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1794 transitions. Word has length 27 [2021-08-06 15:34:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:22,874 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1794 transitions. [2021-08-06 15:34:22,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1794 transitions. [2021-08-06 15:34:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:22,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:22,876 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, 1, 1] [2021-08-06 15:34:22,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:23,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:23,098 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:23,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:23,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1521280500, now seen corresponding path program 10 times [2021-08-06 15:34:23,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:23,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829090267] [2021-08-06 15:34:23,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:23,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:23,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:23,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829090267] [2021-08-06 15:34:23,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829090267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:23,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783631512] [2021-08-06 15:34:23,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:34:23,159 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:23,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:23,160 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:23,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 15:34:23,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:34:23,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:23,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:23,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:23,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783631512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:23,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:23,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:34:23,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230739330] [2021-08-06 15:34:23,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:34:23,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:23,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:34:23,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:34:23,908 INFO L87 Difference]: Start difference. First operand 567 states and 1794 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:24,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:24,457 INFO L93 Difference]: Finished difference Result 1871 states and 5394 transitions. [2021-08-06 15:34:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:34:24,457 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-08-06 15:34:24,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:24,466 INFO L225 Difference]: With dead ends: 1871 [2021-08-06 15:34:24,466 INFO L226 Difference]: Without dead ends: 1871 [2021-08-06 15:34:24,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=357, Invalid=1125, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:34:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-08-06 15:34:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 640. [2021-08-06 15:34:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 3.29264475743349) internal successors, (2104), 639 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 2104 transitions. [2021-08-06 15:34:24,492 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 2104 transitions. Word has length 27 [2021-08-06 15:34:24,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:24,492 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 2104 transitions. [2021-08-06 15:34:24,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 2104 transitions. [2021-08-06 15:34:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:24,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:24,494 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, 1, 1] [2021-08-06 15:34:24,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:24,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:24,708 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:24,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:24,709 INFO L82 PathProgramCache]: Analyzing trace with hash -2041225360, now seen corresponding path program 11 times [2021-08-06 15:34:24,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:24,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844297025] [2021-08-06 15:34:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:24,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:24,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:24,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844297025] [2021-08-06 15:34:24,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844297025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:24,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193616393] [2021-08-06 15:34:24,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:24,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:24,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:24,765 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:24,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 15:34:25,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:34:25,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:25,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:25,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:25,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193616393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:25,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:25,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:34:25,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251686993] [2021-08-06 15:34:25,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:34:25,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:25,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:34:25,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:34:25,501 INFO L87 Difference]: Start difference. First operand 640 states and 2104 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:26,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:26,054 INFO L93 Difference]: Finished difference Result 1774 states and 5180 transitions. [2021-08-06 15:34:26,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:34:26,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-08-06 15:34:26,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:26,066 INFO L225 Difference]: With dead ends: 1774 [2021-08-06 15:34:26,066 INFO L226 Difference]: Without dead ends: 1766 [2021-08-06 15:34:26,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 339.2ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:34:26,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-08-06 15:34:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 628. [2021-08-06 15:34:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.291866028708134) internal successors, (2064), 627 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:26,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2064 transitions. [2021-08-06 15:34:26,087 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2064 transitions. Word has length 27 [2021-08-06 15:34:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:26,087 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 2064 transitions. [2021-08-06 15:34:26,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:26,088 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2064 transitions. [2021-08-06 15:34:26,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:26,089 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:26,090 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, 1, 1] [2021-08-06 15:34:26,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:26,313 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,SelfDestructingSolverStorable27 [2021-08-06 15:34:26,314 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:26,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:26,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1317146360, now seen corresponding path program 12 times [2021-08-06 15:34:26,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:26,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267505156] [2021-08-06 15:34:26,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:26,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:26,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:26,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267505156] [2021-08-06 15:34:26,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267505156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:26,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337814113] [2021-08-06 15:34:26,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:26,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:26,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:26,381 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:26,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 15:34:26,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:34:26,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:26,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:26,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:27,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337814113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:27,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:27,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:34:27,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18313879] [2021-08-06 15:34:27,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:34:27,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:27,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:34:27,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:34:27,143 INFO L87 Difference]: Start difference. First operand 628 states and 2064 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:27,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:27,644 INFO L93 Difference]: Finished difference Result 1916 states and 5637 transitions. [2021-08-06 15:34:27,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:34:27,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:34:27,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:27,648 INFO L225 Difference]: With dead ends: 1916 [2021-08-06 15:34:27,648 INFO L226 Difference]: Without dead ends: 1916 [2021-08-06 15:34:27,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 328.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:34:27,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-08-06 15:34:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 645. [2021-08-06 15:34:27,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.340062111801242) internal successors, (2151), 644 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2151 transitions. [2021-08-06 15:34:27,670 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2151 transitions. Word has length 27 [2021-08-06 15:34:27,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:27,670 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 2151 transitions. [2021-08-06 15:34:27,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2151 transitions. [2021-08-06 15:34:27,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:27,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:27,672 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, 1, 1] [2021-08-06 15:34:27,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-06 15:34:27,887 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,SelfDestructingSolverStorable28 [2021-08-06 15:34:27,887 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:27,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:27,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1518998408, now seen corresponding path program 13 times [2021-08-06 15:34:27,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:27,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725814363] [2021-08-06 15:34:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:27,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:27,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:27,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:27,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725814363] [2021-08-06 15:34:27,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725814363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:27,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573418010] [2021-08-06 15:34:27,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:27,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:27,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:27,948 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:27,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 15:34:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:28,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:28,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:28,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573418010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:28,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:28,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:34:28,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576715752] [2021-08-06 15:34:28,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:34:28,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:28,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:34:28,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:34:28,771 INFO L87 Difference]: Start difference. First operand 645 states and 2151 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:29,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:29,282 INFO L93 Difference]: Finished difference Result 1888 states and 5563 transitions. [2021-08-06 15:34:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:34:29,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:34:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:29,285 INFO L225 Difference]: With dead ends: 1888 [2021-08-06 15:34:29,286 INFO L226 Difference]: Without dead ends: 1888 [2021-08-06 15:34:29,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:34:29,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-08-06 15:34:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 635. [2021-08-06 15:34:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.326498422712934) internal successors, (2109), 634 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2109 transitions. [2021-08-06 15:34:29,305 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2109 transitions. Word has length 27 [2021-08-06 15:34:29,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:29,305 INFO L470 AbstractCegarLoop]: Abstraction has 635 states and 2109 transitions. [2021-08-06 15:34:29,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:29,305 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2109 transitions. [2021-08-06 15:34:29,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:29,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:29,307 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, 1, 1] [2021-08-06 15:34:29,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:29,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:29,525 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:29,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:29,526 INFO L82 PathProgramCache]: Analyzing trace with hash 421342012, now seen corresponding path program 14 times [2021-08-06 15:34:29,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:29,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467648889] [2021-08-06 15:34:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:29,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:29,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:29,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467648889] [2021-08-06 15:34:29,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467648889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:29,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624107596] [2021-08-06 15:34:29,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:29,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:29,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:29,590 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:29,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 15:34:30,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:30,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:30,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:30,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:30,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624107596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:30,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:30,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:34:30,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713480148] [2021-08-06 15:34:30,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:34:30,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:34:30,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:34:30,386 INFO L87 Difference]: Start difference. First operand 635 states and 2109 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:30,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:30,555 INFO L93 Difference]: Finished difference Result 912 states and 2859 transitions. [2021-08-06 15:34:30,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:34:30,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:34:30,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:30,558 INFO L225 Difference]: With dead ends: 912 [2021-08-06 15:34:30,558 INFO L226 Difference]: Without dead ends: 902 [2021-08-06 15:34:30,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:34:30,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-08-06 15:34:30,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 639. [2021-08-06 15:34:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.29153605015674) internal successors, (2100), 638 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2100 transitions. [2021-08-06 15:34:30,569 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2100 transitions. Word has length 27 [2021-08-06 15:34:30,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:30,570 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2100 transitions. [2021-08-06 15:34:30,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:30,570 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2100 transitions. [2021-08-06 15:34:30,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:30,571 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:30,572 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, 1, 1] [2021-08-06 15:34:30,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:30,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:30,796 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:30,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:30,796 INFO L82 PathProgramCache]: Analyzing trace with hash -767869072, now seen corresponding path program 15 times [2021-08-06 15:34:30,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:30,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013628196] [2021-08-06 15:34:30,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:30,796 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:30,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:30,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013628196] [2021-08-06 15:34:30,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013628196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:30,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478510517] [2021-08-06 15:34:30,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:30,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:30,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:30,856 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:30,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 15:34:31,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:34:31,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:31,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:31,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:31,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478510517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:31,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:31,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:34:31,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226448771] [2021-08-06 15:34:31,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:34:31,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:31,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:34:31,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:34:31,704 INFO L87 Difference]: Start difference. First operand 639 states and 2100 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:32,113 INFO L93 Difference]: Finished difference Result 1623 states and 4845 transitions. [2021-08-06 15:34:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:34:32,114 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 27 [2021-08-06 15:34:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:32,117 INFO L225 Difference]: With dead ends: 1623 [2021-08-06 15:34:32,117 INFO L226 Difference]: Without dead ends: 1615 [2021-08-06 15:34:32,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:34:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-08-06 15:34:32,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 657. [2021-08-06 15:34:32,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.285060975609756) internal successors, (2155), 656 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2155 transitions. [2021-08-06 15:34:32,132 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2155 transitions. Word has length 27 [2021-08-06 15:34:32,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:32,132 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 2155 transitions. [2021-08-06 15:34:32,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2155 transitions. [2021-08-06 15:34:32,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:32,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:32,134 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, 1, 1] [2021-08-06 15:34:32,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:32,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:32,357 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:32,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:32,358 INFO L82 PathProgramCache]: Analyzing trace with hash 210688372, now seen corresponding path program 16 times [2021-08-06 15:34:32,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:32,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663321589] [2021-08-06 15:34:32,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:32,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:32,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:32,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663321589] [2021-08-06 15:34:32,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663321589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:32,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386804918] [2021-08-06 15:34:32,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:34:32,410 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:32,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:32,410 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:32,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 15:34:33,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:34:33,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:33,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:33,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:33,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386804918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:33,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:33,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:34:33,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779253359] [2021-08-06 15:34:33,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:34:33,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:33,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:34:33,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:34:33,220 INFO L87 Difference]: Start difference. First operand 657 states and 2155 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:33,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:33,741 INFO L93 Difference]: Finished difference Result 1707 states and 5021 transitions. [2021-08-06 15:34:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:34:33,741 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 27 [2021-08-06 15:34:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:33,746 INFO L225 Difference]: With dead ends: 1707 [2021-08-06 15:34:33,746 INFO L226 Difference]: Without dead ends: 1707 [2021-08-06 15:34:33,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:34:33,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-08-06 15:34:33,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 642. [2021-08-06 15:34:33,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.282371294851794) internal successors, (2104), 641 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:33,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2104 transitions. [2021-08-06 15:34:33,768 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2104 transitions. Word has length 27 [2021-08-06 15:34:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:33,768 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 2104 transitions. [2021-08-06 15:34:33,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:33,768 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2104 transitions. [2021-08-06 15:34:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:33,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:33,770 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, 1, 1] [2021-08-06 15:34:33,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:33,984 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,SelfDestructingSolverStorable32 [2021-08-06 15:34:33,985 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:33,985 INFO L82 PathProgramCache]: Analyzing trace with hash -143499400, now seen corresponding path program 17 times [2021-08-06 15:34:33,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:33,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873754345] [2021-08-06 15:34:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:33,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:34,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:34,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873754345] [2021-08-06 15:34:34,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873754345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:34,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606361872] [2021-08-06 15:34:34,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:34,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:34,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:34,044 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:34,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 15:34:34,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:34:34,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:34,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:34,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:34,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606361872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:34,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:34,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:34:34,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735020364] [2021-08-06 15:34:34,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:34:34,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:34,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:34:34,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:34:34,865 INFO L87 Difference]: Start difference. First operand 642 states and 2104 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:35,111 INFO L93 Difference]: Finished difference Result 1202 states and 3649 transitions. [2021-08-06 15:34:35,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:34:35,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-08-06 15:34:35,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:35,127 INFO L225 Difference]: With dead ends: 1202 [2021-08-06 15:34:35,128 INFO L226 Difference]: Without dead ends: 1190 [2021-08-06 15:34:35,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:34:35,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-08-06 15:34:35,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 664. [2021-08-06 15:34:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 3.2654600301659125) internal successors, (2165), 663 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:35,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2165 transitions. [2021-08-06 15:34:35,145 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2165 transitions. Word has length 27 [2021-08-06 15:34:35,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:35,145 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 2165 transitions. [2021-08-06 15:34:35,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2165 transitions. [2021-08-06 15:34:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:35,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:35,146 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, 1, 1] [2021-08-06 15:34:35,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-06 15:34:35,360 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,SelfDestructingSolverStorable33 [2021-08-06 15:34:35,361 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:35,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:35,361 INFO L82 PathProgramCache]: Analyzing trace with hash 778202740, now seen corresponding path program 18 times [2021-08-06 15:34:35,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:35,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837198659] [2021-08-06 15:34:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:35,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:35,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:35,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837198659] [2021-08-06 15:34:35,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837198659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:35,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063644110] [2021-08-06 15:34:35,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:35,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:35,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:35,423 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:35,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 15:34:36,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:34:36,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:36,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:36,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:36,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063644110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:36,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:36,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:34:36,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548145618] [2021-08-06 15:34:36,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:34:36,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:36,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:34:36,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:34:36,223 INFO L87 Difference]: Start difference. First operand 664 states and 2165 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:36,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:36,523 INFO L93 Difference]: Finished difference Result 1451 states and 4277 transitions. [2021-08-06 15:34:36,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:34:36,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-08-06 15:34:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:36,528 INFO L225 Difference]: With dead ends: 1451 [2021-08-06 15:34:36,528 INFO L226 Difference]: Without dead ends: 1443 [2021-08-06 15:34:36,528 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:34:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-08-06 15:34:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 703. [2021-08-06 15:34:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.274928774928775) internal successors, (2299), 702 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2299 transitions. [2021-08-06 15:34:36,549 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2299 transitions. Word has length 27 [2021-08-06 15:34:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:36,549 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2299 transitions. [2021-08-06 15:34:36,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:36,549 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2299 transitions. [2021-08-06 15:34:36,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:36,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:36,551 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, 1, 1] [2021-08-06 15:34:36,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:36,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-06 15:34:36,769 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:36,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1756760184, now seen corresponding path program 19 times [2021-08-06 15:34:36,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:36,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822194210] [2021-08-06 15:34:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:36,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:36,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:36,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822194210] [2021-08-06 15:34:36,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822194210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:36,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037204304] [2021-08-06 15:34:36,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:36,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:36,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:36,836 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:36,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 15:34:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:37,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:37,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:37,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037204304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:37,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:37,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:34:37,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631465716] [2021-08-06 15:34:37,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:34:37,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:37,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:34:37,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:34:37,673 INFO L87 Difference]: Start difference. First operand 703 states and 2299 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:38,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:38,064 INFO L93 Difference]: Finished difference Result 1579 states and 4588 transitions. [2021-08-06 15:34:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:34:38,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-08-06 15:34:38,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:38,067 INFO L225 Difference]: With dead ends: 1579 [2021-08-06 15:34:38,067 INFO L226 Difference]: Without dead ends: 1579 [2021-08-06 15:34:38,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:34:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-08-06 15:34:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 697. [2021-08-06 15:34:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.281609195402299) internal successors, (2284), 696 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2284 transitions. [2021-08-06 15:34:38,083 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2284 transitions. Word has length 27 [2021-08-06 15:34:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:38,083 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 2284 transitions. [2021-08-06 15:34:38,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2284 transitions. [2021-08-06 15:34:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:38,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:38,085 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, 1, 1] [2021-08-06 15:34:38,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:38,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:38,305 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:38,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:38,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1999271908, now seen corresponding path program 20 times [2021-08-06 15:34:38,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:38,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834781777] [2021-08-06 15:34:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:38,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:38,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:38,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:38,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834781777] [2021-08-06 15:34:38,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834781777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:38,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687653407] [2021-08-06 15:34:38,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:38,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:38,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:38,362 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:38,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 15:34:39,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:39,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:39,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:39,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:39,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687653407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:39,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:39,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:34:39,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488971337] [2021-08-06 15:34:39,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:34:39,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:39,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:34:39,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:34:39,252 INFO L87 Difference]: Start difference. First operand 697 states and 2284 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:39,541 INFO L93 Difference]: Finished difference Result 1913 states and 5956 transitions. [2021-08-06 15:34:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:34:39,542 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:34:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:39,545 INFO L225 Difference]: With dead ends: 1913 [2021-08-06 15:34:39,545 INFO L226 Difference]: Without dead ends: 1913 [2021-08-06 15:34:39,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:34:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-08-06 15:34:39,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 898. [2021-08-06 15:34:39,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4247491638795986) internal successors, (3072), 897 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3072 transitions. [2021-08-06 15:34:39,565 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3072 transitions. Word has length 27 [2021-08-06 15:34:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:39,565 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 3072 transitions. [2021-08-06 15:34:39,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:39,565 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3072 transitions. [2021-08-06 15:34:39,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:39,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:39,567 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, 1, 1] [2021-08-06 15:34:39,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:39,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 15:34:39,777 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:39,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:39,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1496327724, now seen corresponding path program 21 times [2021-08-06 15:34:39,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:39,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791336819] [2021-08-06 15:34:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:39,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:39,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:39,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791336819] [2021-08-06 15:34:39,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791336819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:39,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210460267] [2021-08-06 15:34:39,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:39,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:39,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:39,834 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:39,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 15:34:40,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:34:40,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:40,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:40,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:40,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210460267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:40,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:40,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:34:40,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17350844] [2021-08-06 15:34:40,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:34:40,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:40,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:34:40,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:34:40,719 INFO L87 Difference]: Start difference. First operand 898 states and 3072 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:40,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:40,989 INFO L93 Difference]: Finished difference Result 1741 states and 5401 transitions. [2021-08-06 15:34:40,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:34:40,989 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:34:40,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:40,992 INFO L225 Difference]: With dead ends: 1741 [2021-08-06 15:34:40,992 INFO L226 Difference]: Without dead ends: 1731 [2021-08-06 15:34:40,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:34:40,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-08-06 15:34:41,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 895. [2021-08-06 15:34:41,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4004474272930647) internal successors, (3040), 894 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3040 transitions. [2021-08-06 15:34:41,014 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3040 transitions. Word has length 27 [2021-08-06 15:34:41,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:41,014 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 3040 transitions. [2021-08-06 15:34:41,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3040 transitions. [2021-08-06 15:34:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:41,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:41,016 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, 1, 1] [2021-08-06 15:34:41,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 15:34:41,220 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,SelfDestructingSolverStorable37 [2021-08-06 15:34:41,220 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:41,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1229315484, now seen corresponding path program 22 times [2021-08-06 15:34:41,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:41,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982847373] [2021-08-06 15:34:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:41,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:41,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:41,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982847373] [2021-08-06 15:34:41,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982847373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:41,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182025516] [2021-08-06 15:34:41,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:34:41,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:41,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:41,280 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:41,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 15:34:42,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:34:42,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:42,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:42,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:42,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182025516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:42,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:42,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:34:42,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045550802] [2021-08-06 15:34:42,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:34:42,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:42,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:34:42,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:34:42,212 INFO L87 Difference]: Start difference. First operand 895 states and 3040 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:42,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:42,564 INFO L93 Difference]: Finished difference Result 1821 states and 5773 transitions. [2021-08-06 15:34:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:34:42,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:34:42,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:42,567 INFO L225 Difference]: With dead ends: 1821 [2021-08-06 15:34:42,567 INFO L226 Difference]: Without dead ends: 1821 [2021-08-06 15:34:42,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:34:42,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-08-06 15:34:42,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 922. [2021-08-06 15:34:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.3832790445168297) internal successors, (3116), 921 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3116 transitions. [2021-08-06 15:34:42,585 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3116 transitions. Word has length 27 [2021-08-06 15:34:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:42,585 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 3116 transitions. [2021-08-06 15:34:42,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3116 transitions. [2021-08-06 15:34:42,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:42,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:42,587 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, 1, 1] [2021-08-06 15:34:42,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:42,787 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,SelfDestructingSolverStorable38 [2021-08-06 15:34:42,787 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:42,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:42,788 INFO L82 PathProgramCache]: Analyzing trace with hash -889239010, now seen corresponding path program 23 times [2021-08-06 15:34:42,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:42,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250946856] [2021-08-06 15:34:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:42,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:42,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:42,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250946856] [2021-08-06 15:34:42,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250946856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:42,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787854935] [2021-08-06 15:34:42,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:42,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:42,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:42,843 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:42,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 15:34:43,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:43,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:43,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:43,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:43,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787854935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:43,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:43,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:34:43,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753482383] [2021-08-06 15:34:43,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:34:43,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:43,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:34:43,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:34:43,760 INFO L87 Difference]: Start difference. First operand 922 states and 3116 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:43,923 INFO L93 Difference]: Finished difference Result 1342 states and 4285 transitions. [2021-08-06 15:34:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:34:43,923 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:34:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:43,926 INFO L225 Difference]: With dead ends: 1342 [2021-08-06 15:34:43,926 INFO L226 Difference]: Without dead ends: 1311 [2021-08-06 15:34:43,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:34:43,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-08-06 15:34:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 986. [2021-08-06 15:34:43,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.3573604060913707) internal successors, (3307), 985 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3307 transitions. [2021-08-06 15:34:43,942 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3307 transitions. Word has length 27 [2021-08-06 15:34:43,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:43,943 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 3307 transitions. [2021-08-06 15:34:43,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:43,943 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3307 transitions. [2021-08-06 15:34:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:43,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:43,944 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, 1, 1] [2021-08-06 15:34:43,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:44,145 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,SelfDestructingSolverStorable39 [2021-08-06 15:34:44,145 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:44,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:44,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1659615388, now seen corresponding path program 24 times [2021-08-06 15:34:44,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:44,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991652417] [2021-08-06 15:34:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:44,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:44,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:44,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991652417] [2021-08-06 15:34:44,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991652417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:44,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346883808] [2021-08-06 15:34:44,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:44,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:44,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:44,201 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:44,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 15:34:44,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:34:44,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:44,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:44,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:45,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346883808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:45,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:45,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:34:45,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612453364] [2021-08-06 15:34:45,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:34:45,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:34:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:34:45,089 INFO L87 Difference]: Start difference. First operand 986 states and 3307 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:45,443 INFO L93 Difference]: Finished difference Result 2119 states and 6592 transitions. [2021-08-06 15:34:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:34:45,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-08-06 15:34:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:45,457 INFO L225 Difference]: With dead ends: 2119 [2021-08-06 15:34:45,457 INFO L226 Difference]: Without dead ends: 2115 [2021-08-06 15:34:45,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:34:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-08-06 15:34:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1074. [2021-08-06 15:34:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.341099720410065) internal successors, (3585), 1073 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3585 transitions. [2021-08-06 15:34:45,477 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3585 transitions. Word has length 27 [2021-08-06 15:34:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:45,477 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 3585 transitions. [2021-08-06 15:34:45,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3585 transitions. [2021-08-06 15:34:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:45,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:45,480 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, 1, 1] [2021-08-06 15:34:45,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 15:34:45,696 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,SelfDestructingSolverStorable40 [2021-08-06 15:34:45,697 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:45,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:45,697 INFO L82 PathProgramCache]: Analyzing trace with hash -681057944, now seen corresponding path program 25 times [2021-08-06 15:34:45,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:45,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466479617] [2021-08-06 15:34:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:45,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:45,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:45,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:45,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466479617] [2021-08-06 15:34:45,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466479617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:45,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742324001] [2021-08-06 15:34:45,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:45,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:45,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:45,756 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:45,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 15:34:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:46,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:46,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:46,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742324001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:46,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:46,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:34:46,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090808690] [2021-08-06 15:34:46,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:34:46,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:46,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:34:46,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:34:46,683 INFO L87 Difference]: Start difference. First operand 1074 states and 3585 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:47,100 INFO L93 Difference]: Finished difference Result 2273 states and 6985 transitions. [2021-08-06 15:34:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:34:47,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-08-06 15:34:47,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:47,104 INFO L225 Difference]: With dead ends: 2273 [2021-08-06 15:34:47,104 INFO L226 Difference]: Without dead ends: 2273 [2021-08-06 15:34:47,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:34:47,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-08-06 15:34:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1032. [2021-08-06 15:34:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 3.344325897187197) internal successors, (3448), 1031 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:47,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3448 transitions. [2021-08-06 15:34:47,124 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3448 transitions. Word has length 27 [2021-08-06 15:34:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:47,125 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 3448 transitions. [2021-08-06 15:34:47,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:47,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3448 transitions. [2021-08-06 15:34:47,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:47,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:47,127 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, 1, 1] [2021-08-06 15:34:47,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-06 15:34:47,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:47,327 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:47,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1533437756, now seen corresponding path program 26 times [2021-08-06 15:34:47,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:47,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210408303] [2021-08-06 15:34:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:47,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:47,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:47,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210408303] [2021-08-06 15:34:47,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210408303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:47,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34041840] [2021-08-06 15:34:47,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:47,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:47,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:47,397 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:47,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 15:34:48,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:34:48,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:48,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:48,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:48,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34041840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:48,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:48,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:34:48,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055959856] [2021-08-06 15:34:48,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:34:48,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:48,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:34:48,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:34:48,330 INFO L87 Difference]: Start difference. First operand 1032 states and 3448 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:48,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:48,602 INFO L93 Difference]: Finished difference Result 2014 states and 6277 transitions. [2021-08-06 15:34:48,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:34:48,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-08-06 15:34:48,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:48,606 INFO L225 Difference]: With dead ends: 2014 [2021-08-06 15:34:48,606 INFO L226 Difference]: Without dead ends: 2014 [2021-08-06 15:34:48,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:34:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-08-06 15:34:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1044. [2021-08-06 15:34:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.340364333652924) internal successors, (3484), 1043 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3484 transitions. [2021-08-06 15:34:48,627 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3484 transitions. Word has length 27 [2021-08-06 15:34:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:48,627 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 3484 transitions. [2021-08-06 15:34:48,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:48,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3484 transitions. [2021-08-06 15:34:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:48,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:48,630 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, 1, 1] [2021-08-06 15:34:48,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:48,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-06 15:34:48,854 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:48,855 INFO L82 PathProgramCache]: Analyzing trace with hash -982650124, now seen corresponding path program 27 times [2021-08-06 15:34:48,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:48,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399095320] [2021-08-06 15:34:48,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:48,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:48,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:48,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399095320] [2021-08-06 15:34:48,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399095320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:48,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062366473] [2021-08-06 15:34:48,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:48,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:48,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:48,906 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:48,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 15:34:49,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:34:49,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:49,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:49,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:49,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062366473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:49,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:49,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 15:34:49,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033160553] [2021-08-06 15:34:49,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:34:49,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:49,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:34:49,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:34:49,841 INFO L87 Difference]: Start difference. First operand 1044 states and 3484 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:50,067 INFO L93 Difference]: Finished difference Result 1776 states and 5488 transitions. [2021-08-06 15:34:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:34:50,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-08-06 15:34:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:50,070 INFO L225 Difference]: With dead ends: 1776 [2021-08-06 15:34:50,070 INFO L226 Difference]: Without dead ends: 1764 [2021-08-06 15:34:50,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:34:50,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-08-06 15:34:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1102. [2021-08-06 15:34:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.321525885558583) internal successors, (3657), 1101 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3657 transitions. [2021-08-06 15:34:50,089 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3657 transitions. Word has length 27 [2021-08-06 15:34:50,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:50,089 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 3657 transitions. [2021-08-06 15:34:50,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3657 transitions. [2021-08-06 15:34:50,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:50,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:50,091 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, 1, 1] [2021-08-06 15:34:50,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-06 15:34:50,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:50,291 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:50,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:50,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2077943624, now seen corresponding path program 28 times [2021-08-06 15:34:50,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:50,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814185909] [2021-08-06 15:34:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:50,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:50,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:50,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814185909] [2021-08-06 15:34:50,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814185909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:50,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331377800] [2021-08-06 15:34:50,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:34:50,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:50,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:50,351 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:50,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 15:34:51,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:34:51,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:51,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:51,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331377800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:51,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:51,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 15:34:51,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107391755] [2021-08-06 15:34:51,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:34:51,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:51,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:34:51,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:34:51,285 INFO L87 Difference]: Start difference. First operand 1102 states and 3657 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:51,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:51,583 INFO L93 Difference]: Finished difference Result 1940 states and 5945 transitions. [2021-08-06 15:34:51,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:34:51,583 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-08-06 15:34:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:51,586 INFO L225 Difference]: With dead ends: 1940 [2021-08-06 15:34:51,586 INFO L226 Difference]: Without dead ends: 1940 [2021-08-06 15:34:51,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:34:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-08-06 15:34:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1158. [2021-08-06 15:34:51,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3094209161624892) internal successors, (3829), 1157 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3829 transitions. [2021-08-06 15:34:51,615 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3829 transitions. Word has length 27 [2021-08-06 15:34:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:51,615 INFO L470 AbstractCegarLoop]: Abstraction has 1158 states and 3829 transitions. [2021-08-06 15:34:51,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:51,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3829 transitions. [2021-08-06 15:34:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:51,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:51,617 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, 1, 1] [2021-08-06 15:34:51,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:51,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-06 15:34:51,818 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:51,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:51,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1024461816, now seen corresponding path program 3 times [2021-08-06 15:34:51,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:51,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042654685] [2021-08-06 15:34:51,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:51,819 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:51,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:51,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042654685] [2021-08-06 15:34:51,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042654685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:51,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566532178] [2021-08-06 15:34:51,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:34:51,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:51,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:51,883 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:51,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 15:34:52,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:34:52,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:52,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:52,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:52,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566532178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:52,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:52,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:34:52,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204911025] [2021-08-06 15:34:52,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:34:52,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:52,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:34:52,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:34:52,846 INFO L87 Difference]: Start difference. First operand 1158 states and 3829 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:53,178 INFO L93 Difference]: Finished difference Result 1759 states and 5449 transitions. [2021-08-06 15:34:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:34:53,178 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 27 [2021-08-06 15:34:53,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:53,181 INFO L225 Difference]: With dead ends: 1759 [2021-08-06 15:34:53,181 INFO L226 Difference]: Without dead ends: 1759 [2021-08-06 15:34:53,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:34:53,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-08-06 15:34:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1180. [2021-08-06 15:34:53,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.3078880407124682) internal successors, (3900), 1179 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3900 transitions. [2021-08-06 15:34:53,206 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3900 transitions. Word has length 27 [2021-08-06 15:34:53,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:53,206 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 3900 transitions. [2021-08-06 15:34:53,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:53,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3900 transitions. [2021-08-06 15:34:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:53,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:53,209 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, 1, 1] [2021-08-06 15:34:53,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:53,428 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,SelfDestructingSolverStorable45 [2021-08-06 15:34:53,429 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:53,429 INFO L82 PathProgramCache]: Analyzing trace with hash 394843068, now seen corresponding path program 4 times [2021-08-06 15:34:53,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:53,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875153082] [2021-08-06 15:34:53,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:53,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:53,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:53,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875153082] [2021-08-06 15:34:53,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875153082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:53,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958560240] [2021-08-06 15:34:53,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:34:53,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:53,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:53,475 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:53,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 15:34:54,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:34:54,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:54,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:34:54,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:54,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958560240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:54,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:54,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 15:34:54,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092769414] [2021-08-06 15:34:54,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:34:54,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:54,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:34:54,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:34:54,458 INFO L87 Difference]: Start difference. First operand 1180 states and 3900 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:54,574 INFO L93 Difference]: Finished difference Result 1872 states and 5977 transitions. [2021-08-06 15:34:54,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:34:54,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 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 27 [2021-08-06 15:34:54,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:54,577 INFO L225 Difference]: With dead ends: 1872 [2021-08-06 15:34:54,577 INFO L226 Difference]: Without dead ends: 1854 [2021-08-06 15:34:54,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:34:54,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-08-06 15:34:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1389. [2021-08-06 15:34:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1388 states have (on average 3.3746397694524495) internal successors, (4684), 1388 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:54,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 4684 transitions. [2021-08-06 15:34:54,598 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 4684 transitions. Word has length 27 [2021-08-06 15:34:54,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:54,598 INFO L470 AbstractCegarLoop]: Abstraction has 1389 states and 4684 transitions. [2021-08-06 15:34:54,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:54,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 4684 transitions. [2021-08-06 15:34:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:54,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:54,601 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, 1, 1] [2021-08-06 15:34:54,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:54,802 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,SelfDestructingSolverStorable46 [2021-08-06 15:34:54,802 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:54,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:54,803 INFO L82 PathProgramCache]: Analyzing trace with hash -364125024, now seen corresponding path program 5 times [2021-08-06 15:34:54,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:54,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972345505] [2021-08-06 15:34:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:54,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:54,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:54,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972345505] [2021-08-06 15:34:54,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972345505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:54,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297217968] [2021-08-06 15:34:54,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:34:54,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:54,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:54,859 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:54,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 15:34:55,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:34:55,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:55,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:34:55,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:55,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297217968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:55,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:55,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-06 15:34:55,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074892419] [2021-08-06 15:34:55,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:34:55,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:55,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:34:55,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:34:55,848 INFO L87 Difference]: Start difference. First operand 1389 states and 4684 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:55,978 INFO L93 Difference]: Finished difference Result 2133 states and 6693 transitions. [2021-08-06 15:34:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:34:55,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 27 [2021-08-06 15:34:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:55,982 INFO L225 Difference]: With dead ends: 2133 [2021-08-06 15:34:55,983 INFO L226 Difference]: Without dead ends: 2133 [2021-08-06 15:34:55,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:34:55,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-08-06 15:34:56,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1392. [2021-08-06 15:34:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.3608914450035945) internal successors, (4675), 1391 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:56,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4675 transitions. [2021-08-06 15:34:56,013 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4675 transitions. Word has length 27 [2021-08-06 15:34:56,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:56,013 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 4675 transitions. [2021-08-06 15:34:56,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:56,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4675 transitions. [2021-08-06 15:34:56,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:56,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:56,016 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, 1, 1] [2021-08-06 15:34:56,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 15:34:56,240 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,SelfDestructingSolverStorable47 [2021-08-06 15:34:56,240 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:56,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:56,241 INFO L82 PathProgramCache]: Analyzing trace with hash -222606288, now seen corresponding path program 6 times [2021-08-06 15:34:56,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:56,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142055215] [2021-08-06 15:34:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:56,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:56,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:56,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142055215] [2021-08-06 15:34:56,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142055215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:56,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470820549] [2021-08-06 15:34:56,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:34:56,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:56,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:56,313 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:56,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 15:34:57,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:34:57,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:57,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:57,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470820549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:57,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:57,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-06 15:34:57,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896351337] [2021-08-06 15:34:57,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:34:57,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:57,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:34:57,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:34:57,325 INFO L87 Difference]: Start difference. First operand 1392 states and 4675 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:57,569 INFO L93 Difference]: Finished difference Result 2050 states and 6469 transitions. [2021-08-06 15:34:57,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:34:57,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 27 [2021-08-06 15:34:57,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:57,572 INFO L225 Difference]: With dead ends: 2050 [2021-08-06 15:34:57,573 INFO L226 Difference]: Without dead ends: 2046 [2021-08-06 15:34:57,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:34:57,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-08-06 15:34:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1392. [2021-08-06 15:34:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.359453630481668) internal successors, (4673), 1391 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4673 transitions. [2021-08-06 15:34:57,611 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4673 transitions. Word has length 27 [2021-08-06 15:34:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:57,612 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 4673 transitions. [2021-08-06 15:34:57,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4673 transitions. [2021-08-06 15:34:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:57,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:57,615 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, 1, 1] [2021-08-06 15:34:57,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 15:34:57,836 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,SelfDestructingSolverStorable48 [2021-08-06 15:34:57,837 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:57,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1225645432, now seen corresponding path program 7 times [2021-08-06 15:34:57,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:57,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778915429] [2021-08-06 15:34:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:57,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:57,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:57,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:57,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778915429] [2021-08-06 15:34:57,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778915429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:57,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734175341] [2021-08-06 15:34:57,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:34:57,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:57,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:57,903 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:57,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 15:34:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:58,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:34:58,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:34:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:58,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734175341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:58,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:34:58,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-06 15:34:58,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127254141] [2021-08-06 15:34:58,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:34:58,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:34:58,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:34:58,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:34:58,956 INFO L87 Difference]: Start difference. First operand 1392 states and 4673 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:34:59,207 INFO L93 Difference]: Finished difference Result 2257 states and 7002 transitions. [2021-08-06 15:34:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:34:59,208 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 27 [2021-08-06 15:34:59,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:34:59,212 INFO L225 Difference]: With dead ends: 2257 [2021-08-06 15:34:59,212 INFO L226 Difference]: Without dead ends: 2257 [2021-08-06 15:34:59,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:34:59,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-08-06 15:34:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1442. [2021-08-06 15:34:59,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3587786259541983) internal successors, (4840), 1441 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4840 transitions. [2021-08-06 15:34:59,237 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4840 transitions. Word has length 27 [2021-08-06 15:34:59,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:34:59,237 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 4840 transitions. [2021-08-06 15:34:59,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:34:59,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4840 transitions. [2021-08-06 15:34:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:34:59,240 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:34:59,240 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, 1, 1] [2021-08-06 15:34:59,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 15:34:59,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 15:34:59,440 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:34:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:34:59,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1747073476, now seen corresponding path program 8 times [2021-08-06 15:34:59,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:34:59,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727800408] [2021-08-06 15:34:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:34:59,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:34:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:34:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:34:59,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:34:59,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727800408] [2021-08-06 15:34:59,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727800408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:34:59,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490307056] [2021-08-06 15:34:59,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:34:59,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:34:59,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:34:59,486 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:34:59,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 15:35:00,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:35:00,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:00,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:35:00,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:00,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490307056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:00,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:00,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-06 15:35:00,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948181377] [2021-08-06 15:35:00,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:35:00,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:35:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:35:00,519 INFO L87 Difference]: Start difference. First operand 1442 states and 4840 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:00,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:00,678 INFO L93 Difference]: Finished difference Result 2263 states and 7241 transitions. [2021-08-06 15:35:00,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:35:00,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 27 [2021-08-06 15:35:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:00,682 INFO L225 Difference]: With dead ends: 2263 [2021-08-06 15:35:00,682 INFO L226 Difference]: Without dead ends: 2257 [2021-08-06 15:35:00,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:35:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-08-06 15:35:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1535. [2021-08-06 15:35:00,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3872229465449806) internal successors, (5196), 1534 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:00,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5196 transitions. [2021-08-06 15:35:00,708 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5196 transitions. Word has length 27 [2021-08-06 15:35:00,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:00,708 INFO L470 AbstractCegarLoop]: Abstraction has 1535 states and 5196 transitions. [2021-08-06 15:35:00,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:00,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5196 transitions. [2021-08-06 15:35:00,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:00,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:00,711 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, 1, 1] [2021-08-06 15:35:00,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 15:35:00,912 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,SelfDestructingSolverStorable50 [2021-08-06 15:35:00,912 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1816588132, now seen corresponding path program 9 times [2021-08-06 15:35:00,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:00,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386314511] [2021-08-06 15:35:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:00,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:00,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:00,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386314511] [2021-08-06 15:35:00,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386314511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:00,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962746494] [2021-08-06 15:35:00,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:35:00,965 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:00,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:00,966 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:00,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 15:35:01,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:35:01,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:01,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:35:01,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:02,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962746494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:02,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:02,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-06 15:35:02,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923553782] [2021-08-06 15:35:02,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:35:02,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:02,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:35:02,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:35:02,140 INFO L87 Difference]: Start difference. First operand 1535 states and 5196 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:02,287 INFO L93 Difference]: Finished difference Result 2415 states and 7685 transitions. [2021-08-06 15:35:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:35:02,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 27 [2021-08-06 15:35:02,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:02,291 INFO L225 Difference]: With dead ends: 2415 [2021-08-06 15:35:02,291 INFO L226 Difference]: Without dead ends: 2415 [2021-08-06 15:35:02,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:35:02,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-08-06 15:35:02,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1459. [2021-08-06 15:35:02,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.347736625514403) internal successors, (4881), 1458 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4881 transitions. [2021-08-06 15:35:02,331 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4881 transitions. Word has length 27 [2021-08-06 15:35:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:02,331 INFO L470 AbstractCegarLoop]: Abstraction has 1459 states and 4881 transitions. [2021-08-06 15:35:02,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4881 transitions. [2021-08-06 15:35:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:02,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:02,334 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, 1, 1] [2021-08-06 15:35:02,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 15:35:02,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:02,535 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1958106868, now seen corresponding path program 10 times [2021-08-06 15:35:02,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:02,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990846186] [2021-08-06 15:35:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:02,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:02,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:02,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990846186] [2021-08-06 15:35:02,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990846186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:02,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015972350] [2021-08-06 15:35:02,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:35:02,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:02,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:02,606 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:02,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 15:35:03,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:35:03,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:03,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:03,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:03,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015972350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:03,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:03,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-06 15:35:03,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535495521] [2021-08-06 15:35:03,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:35:03,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:03,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:35:03,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:35:03,688 INFO L87 Difference]: Start difference. First operand 1459 states and 4881 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:03,954 INFO L93 Difference]: Finished difference Result 2204 states and 6862 transitions. [2021-08-06 15:35:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:35:03,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 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 27 [2021-08-06 15:35:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:03,958 INFO L225 Difference]: With dead ends: 2204 [2021-08-06 15:35:03,958 INFO L226 Difference]: Without dead ends: 2200 [2021-08-06 15:35:03,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:35:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-08-06 15:35:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1419. [2021-08-06 15:35:03,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.349083215796897) internal successors, (4749), 1418 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4749 transitions. [2021-08-06 15:35:03,981 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4749 transitions. Word has length 27 [2021-08-06 15:35:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:03,981 INFO L470 AbstractCegarLoop]: Abstraction has 1419 states and 4749 transitions. [2021-08-06 15:35:03,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4749 transitions. [2021-08-06 15:35:03,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:03,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:03,984 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, 1, 1] [2021-08-06 15:35:04,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 15:35:04,184 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,SelfDestructingSolverStorable52 [2021-08-06 15:35:04,185 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:04,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:04,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1373688992, now seen corresponding path program 11 times [2021-08-06 15:35:04,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:04,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714210245] [2021-08-06 15:35:04,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:04,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:04,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:04,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714210245] [2021-08-06 15:35:04,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714210245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:04,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189706431] [2021-08-06 15:35:04,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:35:04,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:04,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:04,238 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:04,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 15:35:05,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:35:05,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:05,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:35:05,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:05,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189706431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:05,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:05,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 15:35:05,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548731559] [2021-08-06 15:35:05,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:35:05,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:05,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:35:05,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:35:05,339 INFO L87 Difference]: Start difference. First operand 1419 states and 4749 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:05,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:05,509 INFO L93 Difference]: Finished difference Result 2022 states and 6496 transitions. [2021-08-06 15:35:05,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:35:05,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:35:05,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:05,514 INFO L225 Difference]: With dead ends: 2022 [2021-08-06 15:35:05,514 INFO L226 Difference]: Without dead ends: 2022 [2021-08-06 15:35:05,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:35:05,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-08-06 15:35:05,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1518. [2021-08-06 15:35:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3698088332234675) internal successors, (5112), 1517 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5112 transitions. [2021-08-06 15:35:05,564 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5112 transitions. Word has length 27 [2021-08-06 15:35:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:05,565 INFO L470 AbstractCegarLoop]: Abstraction has 1518 states and 5112 transitions. [2021-08-06 15:35:05,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5112 transitions. [2021-08-06 15:35:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:05,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:05,568 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, 1, 1] [2021-08-06 15:35:05,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:05,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:05,797 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:05,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:05,797 INFO L82 PathProgramCache]: Analyzing trace with hash -265980168, now seen corresponding path program 12 times [2021-08-06 15:35:05,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:05,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490145815] [2021-08-06 15:35:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:05,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:05,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:05,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490145815] [2021-08-06 15:35:05,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490145815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:05,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974454520] [2021-08-06 15:35:05,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:35:05,865 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:05,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:05,897 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:05,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 15:35:06,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:35:06,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:06,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:06,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:07,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974454520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:07,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:07,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:35:07,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394489796] [2021-08-06 15:35:07,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:35:07,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:07,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:35:07,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:35:07,166 INFO L87 Difference]: Start difference. First operand 1518 states and 5112 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:07,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:07,407 INFO L93 Difference]: Finished difference Result 2124 states and 6748 transitions. [2021-08-06 15:35:07,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:35:07,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:35:07,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:07,411 INFO L225 Difference]: With dead ends: 2124 [2021-08-06 15:35:07,411 INFO L226 Difference]: Without dead ends: 2112 [2021-08-06 15:35:07,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:35:07,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-08-06 15:35:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1536. [2021-08-06 15:35:07,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.3674267100977198) internal successors, (5169), 1535 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5169 transitions. [2021-08-06 15:35:07,434 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5169 transitions. Word has length 27 [2021-08-06 15:35:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:07,434 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 5169 transitions. [2021-08-06 15:35:07,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5169 transitions. [2021-08-06 15:35:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:07,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:07,436 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, 1, 1, 1, 1] [2021-08-06 15:35:07,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:07,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:07,637 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1152838668, now seen corresponding path program 4 times [2021-08-06 15:35:07,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:07,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829428347] [2021-08-06 15:35:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:07,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:07,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:07,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829428347] [2021-08-06 15:35:07,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829428347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:07,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307640305] [2021-08-06 15:35:07,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:35:07,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:07,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:07,705 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:07,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 15:35:08,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:35:08,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:08,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:35:08,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:08,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307640305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:08,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:08,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 15:35:08,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521708721] [2021-08-06 15:35:08,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:35:08,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:08,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:35:08,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:35:08,950 INFO L87 Difference]: Start difference. First operand 1536 states and 5169 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:09,213 INFO L93 Difference]: Finished difference Result 2332 states and 7312 transitions. [2021-08-06 15:35:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:35:09,214 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2021-08-06 15:35:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:09,217 INFO L225 Difference]: With dead ends: 2332 [2021-08-06 15:35:09,217 INFO L226 Difference]: Without dead ends: 2320 [2021-08-06 15:35:09,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:35:09,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-08-06 15:35:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1566. [2021-08-06 15:35:09,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.375079872204473) internal successors, (5282), 1565 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5282 transitions. [2021-08-06 15:35:09,243 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5282 transitions. Word has length 27 [2021-08-06 15:35:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:09,243 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 5282 transitions. [2021-08-06 15:35:09,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:09,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5282 transitions. [2021-08-06 15:35:09,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:09,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:09,246 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, 1, 1, 1, 1] [2021-08-06 15:35:09,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 15:35:09,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 15:35:09,447 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:09,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:09,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1884144356, now seen corresponding path program 5 times [2021-08-06 15:35:09,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:09,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134458520] [2021-08-06 15:35:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:09,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:09,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:09,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134458520] [2021-08-06 15:35:09,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134458520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:09,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758122434] [2021-08-06 15:35:09,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:35:09,490 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:09,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:09,490 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:09,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 15:35:10,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:35:10,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:10,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:35:10,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:10,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758122434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:10,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:10,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 15:35:10,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256133219] [2021-08-06 15:35:10,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:35:10,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:10,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:35:10,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:35:10,624 INFO L87 Difference]: Start difference. First operand 1566 states and 5282 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:10,898 INFO L93 Difference]: Finished difference Result 2490 states and 7823 transitions. [2021-08-06 15:35:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:35:10,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2021-08-06 15:35:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:10,902 INFO L225 Difference]: With dead ends: 2490 [2021-08-06 15:35:10,902 INFO L226 Difference]: Without dead ends: 2490 [2021-08-06 15:35:10,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:35:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-08-06 15:35:10,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1435. [2021-08-06 15:35:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.311715481171548) internal successors, (4749), 1434 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4749 transitions. [2021-08-06 15:35:10,927 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4749 transitions. Word has length 27 [2021-08-06 15:35:10,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:10,927 INFO L470 AbstractCegarLoop]: Abstraction has 1435 states and 4749 transitions. [2021-08-06 15:35:10,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4749 transitions. [2021-08-06 15:35:10,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:10,929 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:10,929 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, 1, 1] [2021-08-06 15:35:10,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:11,130 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,SelfDestructingSolverStorable56 [2021-08-06 15:35:11,130 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:11,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:11,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1328037108, now seen corresponding path program 13 times [2021-08-06 15:35:11,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:11,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365040604] [2021-08-06 15:35:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:11,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:11,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:11,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365040604] [2021-08-06 15:35:11,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365040604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:11,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533112998] [2021-08-06 15:35:11,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:35:11,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:11,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:11,210 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:11,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 15:35:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:12,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:12,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533112998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:12,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:12,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:35:12,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821964198] [2021-08-06 15:35:12,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:35:12,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:12,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:35:12,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:35:12,401 INFO L87 Difference]: Start difference. First operand 1435 states and 4749 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:12,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:12,737 INFO L93 Difference]: Finished difference Result 2497 states and 7799 transitions. [2021-08-06 15:35:12,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:35:12,738 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 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 27 [2021-08-06 15:35:12,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:12,741 INFO L225 Difference]: With dead ends: 2497 [2021-08-06 15:35:12,742 INFO L226 Difference]: Without dead ends: 2497 [2021-08-06 15:35:12,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:35:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-08-06 15:35:12,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1477. [2021-08-06 15:35:12,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.2981029810298104) internal successors, (4868), 1476 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4868 transitions. [2021-08-06 15:35:12,768 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4868 transitions. Word has length 27 [2021-08-06 15:35:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:12,768 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 4868 transitions. [2021-08-06 15:35:12,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:12,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4868 transitions. [2021-08-06 15:35:12,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:12,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:12,770 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, 1, 1] [2021-08-06 15:35:12,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 15:35:12,971 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,SelfDestructingSolverStorable57 [2021-08-06 15:35:12,971 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:12,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:12,971 INFO L82 PathProgramCache]: Analyzing trace with hash -651492432, now seen corresponding path program 14 times [2021-08-06 15:35:12,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:12,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697916366] [2021-08-06 15:35:12,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:12,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:13,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:13,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697916366] [2021-08-06 15:35:13,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697916366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:13,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745326532] [2021-08-06 15:35:13,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:35:13,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:13,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:13,024 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:13,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 15:35:13,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:35:13,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:13,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:13,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:14,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745326532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:14,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:14,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:35:14,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933914167] [2021-08-06 15:35:14,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:35:14,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:14,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:35:14,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:35:14,225 INFO L87 Difference]: Start difference. First operand 1477 states and 4868 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:14,738 INFO L93 Difference]: Finished difference Result 2724 states and 8387 transitions. [2021-08-06 15:35:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:35:14,738 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-08-06 15:35:14,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:14,743 INFO L225 Difference]: With dead ends: 2724 [2021-08-06 15:35:14,743 INFO L226 Difference]: Without dead ends: 2724 [2021-08-06 15:35:14,744 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:35:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-08-06 15:35:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1533. [2021-08-06 15:35:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.3015665796344646) internal successors, (5058), 1532 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5058 transitions. [2021-08-06 15:35:14,777 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5058 transitions. Word has length 27 [2021-08-06 15:35:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:14,777 INFO L470 AbstractCegarLoop]: Abstraction has 1533 states and 5058 transitions. [2021-08-06 15:35:14,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5058 transitions. [2021-08-06 15:35:14,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:14,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:14,780 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, 1, 1] [2021-08-06 15:35:14,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 15:35:14,982 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,SelfDestructingSolverStorable58 [2021-08-06 15:35:14,982 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:14,982 INFO L82 PathProgramCache]: Analyzing trace with hash 80969004, now seen corresponding path program 15 times [2021-08-06 15:35:14,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:14,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38845236] [2021-08-06 15:35:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:14,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:14,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:15,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:15,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38845236] [2021-08-06 15:35:15,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38845236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:15,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164623499] [2021-08-06 15:35:15,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:35:15,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:15,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:15,034 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:15,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 15:35:16,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:35:16,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:16,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:16,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:16,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164623499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:16,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:16,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:35:16,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386875562] [2021-08-06 15:35:16,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:35:16,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:35:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:35:16,219 INFO L87 Difference]: Start difference. First operand 1533 states and 5058 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:16,621 INFO L93 Difference]: Finished difference Result 2582 states and 8017 transitions. [2021-08-06 15:35:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:35:16,621 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-08-06 15:35:16,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:16,627 INFO L225 Difference]: With dead ends: 2582 [2021-08-06 15:35:16,627 INFO L226 Difference]: Without dead ends: 2578 [2021-08-06 15:35:16,627 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:35:16,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-08-06 15:35:16,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1487. [2021-08-06 15:35:16,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.2994616419919245) internal successors, (4903), 1486 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4903 transitions. [2021-08-06 15:35:16,655 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4903 transitions. Word has length 27 [2021-08-06 15:35:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:16,655 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 4903 transitions. [2021-08-06 15:35:16,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4903 transitions. [2021-08-06 15:35:16,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:16,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:16,658 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, 1, 1] [2021-08-06 15:35:16,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:16,858 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,SelfDestructingSolverStorable59 [2021-08-06 15:35:16,859 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:16,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:16,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1571343112, now seen corresponding path program 16 times [2021-08-06 15:35:16,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:16,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363383052] [2021-08-06 15:35:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:16,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:16,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:16,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363383052] [2021-08-06 15:35:16,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363383052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:16,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294342589] [2021-08-06 15:35:16,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:35:16,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:16,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:16,929 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:16,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 15:35:18,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:35:18,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:18,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:18,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:18,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294342589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:18,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:18,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:35:18,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030141128] [2021-08-06 15:35:18,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:35:18,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:18,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:35:18,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:35:18,210 INFO L87 Difference]: Start difference. First operand 1487 states and 4903 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:18,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:18,554 INFO L93 Difference]: Finished difference Result 2411 states and 7586 transitions. [2021-08-06 15:35:18,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:35:18,554 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 27 [2021-08-06 15:35:18,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:18,558 INFO L225 Difference]: With dead ends: 2411 [2021-08-06 15:35:18,558 INFO L226 Difference]: Without dead ends: 2411 [2021-08-06 15:35:18,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:35:18,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-08-06 15:35:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1471. [2021-08-06 15:35:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.3081632653061224) internal successors, (4863), 1470 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:18,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4863 transitions. [2021-08-06 15:35:18,582 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4863 transitions. Word has length 27 [2021-08-06 15:35:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:18,582 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 4863 transitions. [2021-08-06 15:35:18,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4863 transitions. [2021-08-06 15:35:18,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:18,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:18,585 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, 1, 1, 1, 1] [2021-08-06 15:35:18,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 15:35:18,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:18,791 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:18,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:18,791 INFO L82 PathProgramCache]: Analyzing trace with hash 849104956, now seen corresponding path program 6 times [2021-08-06 15:35:18,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:18,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375343301] [2021-08-06 15:35:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:18,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:18,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:18,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375343301] [2021-08-06 15:35:18,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375343301] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:18,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684737803] [2021-08-06 15:35:18,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:35:18,836 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:18,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:18,837 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:18,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 15:35:19,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:35:19,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:19,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:35:19,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:20,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684737803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:20,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:20,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 15:35:20,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58553214] [2021-08-06 15:35:20,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:35:20,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:20,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:35:20,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:35:20,041 INFO L87 Difference]: Start difference. First operand 1471 states and 4863 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:20,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:20,255 INFO L93 Difference]: Finished difference Result 1987 states and 6138 transitions. [2021-08-06 15:35:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:35:20,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-08-06 15:35:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:20,258 INFO L225 Difference]: With dead ends: 1987 [2021-08-06 15:35:20,258 INFO L226 Difference]: Without dead ends: 1975 [2021-08-06 15:35:20,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:35:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-08-06 15:35:20,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1462. [2021-08-06 15:35:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.308008213552361) internal successors, (4833), 1461 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4833 transitions. [2021-08-06 15:35:20,280 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4833 transitions. Word has length 27 [2021-08-06 15:35:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:20,280 INFO L470 AbstractCegarLoop]: Abstraction has 1462 states and 4833 transitions. [2021-08-06 15:35:20,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4833 transitions. [2021-08-06 15:35:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:20,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:20,282 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, 1, 1, 1, 1] [2021-08-06 15:35:20,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-06 15:35:20,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:20,485 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:20,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1493455884, now seen corresponding path program 7 times [2021-08-06 15:35:20,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:20,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346857678] [2021-08-06 15:35:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:20,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:20,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:20,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346857678] [2021-08-06 15:35:20,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346857678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:20,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434196681] [2021-08-06 15:35:20,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:35:20,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:20,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:20,540 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:20,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 15:35:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:21,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:35:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:21,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434196681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:21,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:21,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 15:35:21,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515706523] [2021-08-06 15:35:21,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:35:21,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:21,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:35:21,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:35:21,797 INFO L87 Difference]: Start difference. First operand 1462 states and 4833 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:22,038 INFO L93 Difference]: Finished difference Result 1951 states and 6027 transitions. [2021-08-06 15:35:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:35:22,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:35:22,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:22,041 INFO L225 Difference]: With dead ends: 1951 [2021-08-06 15:35:22,041 INFO L226 Difference]: Without dead ends: 1923 [2021-08-06 15:35:22,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:35:22,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-08-06 15:35:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1463. [2021-08-06 15:35:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 3.3071135430916554) internal successors, (4835), 1462 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4835 transitions. [2021-08-06 15:35:22,062 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4835 transitions. Word has length 27 [2021-08-06 15:35:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:22,063 INFO L470 AbstractCegarLoop]: Abstraction has 1463 states and 4835 transitions. [2021-08-06 15:35:22,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4835 transitions. [2021-08-06 15:35:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:22,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:22,065 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, 1, 1, 1, 1] [2021-08-06 15:35:22,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 15:35:22,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:22,266 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:22,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1441374180, now seen corresponding path program 8 times [2021-08-06 15:35:22,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:22,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870419938] [2021-08-06 15:35:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:22,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:22,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:22,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870419938] [2021-08-06 15:35:22,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870419938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:22,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075352249] [2021-08-06 15:35:22,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:35:22,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:22,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:22,309 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:22,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 15:35:23,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:35:23,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:23,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:35:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:23,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075352249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:23,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:23,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:35:23,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477902561] [2021-08-06 15:35:23,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:35:23,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:23,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:35:23,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:35:23,536 INFO L87 Difference]: Start difference. First operand 1463 states and 4835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:23,746 INFO L93 Difference]: Finished difference Result 2417 states and 7513 transitions. [2021-08-06 15:35:23,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:35:23,746 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-08-06 15:35:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:23,749 INFO L225 Difference]: With dead ends: 2417 [2021-08-06 15:35:23,749 INFO L226 Difference]: Without dead ends: 2417 [2021-08-06 15:35:23,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:35:23,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-08-06 15:35:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1487. [2021-08-06 15:35:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.3250336473755047) internal successors, (4941), 1486 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:23,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4941 transitions. [2021-08-06 15:35:23,776 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4941 transitions. Word has length 27 [2021-08-06 15:35:23,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:23,777 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 4941 transitions. [2021-08-06 15:35:23,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:23,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4941 transitions. [2021-08-06 15:35:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:23,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:23,779 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, 1, 1, 1, 1] [2021-08-06 15:35:23,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:23,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:23,981 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1264993636, now seen corresponding path program 9 times [2021-08-06 15:35:23,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:23,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025338521] [2021-08-06 15:35:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:23,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:24,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:24,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025338521] [2021-08-06 15:35:24,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025338521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:24,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005499631] [2021-08-06 15:35:24,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:35:24,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:24,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:24,035 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:24,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 15:35:25,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:35:25,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:25,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:35:25,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:25,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005499631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:25,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:25,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:35:25,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017104490] [2021-08-06 15:35:25,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:35:25,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:25,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:35:25,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:35:25,309 INFO L87 Difference]: Start difference. First operand 1487 states and 4941 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:25,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:25,508 INFO L93 Difference]: Finished difference Result 2191 states and 6835 transitions. [2021-08-06 15:35:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:35:25,508 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-08-06 15:35:25,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:25,512 INFO L225 Difference]: With dead ends: 2191 [2021-08-06 15:35:25,512 INFO L226 Difference]: Without dead ends: 2170 [2021-08-06 15:35:25,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:35:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-08-06 15:35:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1487. [2021-08-06 15:35:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.319650067294751) internal successors, (4933), 1486 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4933 transitions. [2021-08-06 15:35:25,547 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4933 transitions. Word has length 27 [2021-08-06 15:35:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:25,548 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 4933 transitions. [2021-08-06 15:35:25,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:25,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4933 transitions. [2021-08-06 15:35:25,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:25,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:25,550 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, 1, 1, 1, 1] [2021-08-06 15:35:25,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:25,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 15:35:25,751 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:25,751 INFO L82 PathProgramCache]: Analyzing trace with hash 688690008, now seen corresponding path program 10 times [2021-08-06 15:35:25,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:25,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135879129] [2021-08-06 15:35:25,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:25,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:25,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:25,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135879129] [2021-08-06 15:35:25,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135879129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:25,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062931807] [2021-08-06 15:35:25,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:35:25,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:25,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:25,806 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:25,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 15:35:26,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:35:26,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:26,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:35:26,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:27,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062931807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:27,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:27,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 15:35:27,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330407123] [2021-08-06 15:35:27,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:35:27,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:27,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:35:27,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:35:27,061 INFO L87 Difference]: Start difference. First operand 1487 states and 4933 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:27,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:27,251 INFO L93 Difference]: Finished difference Result 1790 states and 5786 transitions. [2021-08-06 15:35:27,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:35:27,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2021-08-06 15:35:27,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:27,254 INFO L225 Difference]: With dead ends: 1790 [2021-08-06 15:35:27,254 INFO L226 Difference]: Without dead ends: 1790 [2021-08-06 15:35:27,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:35:27,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-08-06 15:35:27,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1467. [2021-08-06 15:35:27,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.319918144611187) internal successors, (4867), 1466 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:27,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4867 transitions. [2021-08-06 15:35:27,273 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4867 transitions. Word has length 27 [2021-08-06 15:35:27,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:27,273 INFO L470 AbstractCegarLoop]: Abstraction has 1467 states and 4867 transitions. [2021-08-06 15:35:27,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:27,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4867 transitions. [2021-08-06 15:35:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:27,276 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:27,276 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, 1, 1, 1, 1] [2021-08-06 15:35:27,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-06 15:35:27,476 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,SelfDestructingSolverStorable65 [2021-08-06 15:35:27,477 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:27,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:27,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1700169504, now seen corresponding path program 11 times [2021-08-06 15:35:27,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:27,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599662457] [2021-08-06 15:35:27,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:27,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:27,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:27,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599662457] [2021-08-06 15:35:27,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599662457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:27,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60680395] [2021-08-06 15:35:27,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:35:27,547 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:27,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:27,561 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:27,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 15:35:28,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:35:28,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:28,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:35:28,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:28,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60680395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:28,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:28,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:35:28,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014874448] [2021-08-06 15:35:28,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:35:28,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:28,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:35:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:35:28,848 INFO L87 Difference]: Start difference. First operand 1467 states and 4867 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:29,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:29,024 INFO L93 Difference]: Finished difference Result 2556 states and 8173 transitions. [2021-08-06 15:35:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:35:29,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-08-06 15:35:29,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:29,028 INFO L225 Difference]: With dead ends: 2556 [2021-08-06 15:35:29,028 INFO L226 Difference]: Without dead ends: 2556 [2021-08-06 15:35:29,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:35:29,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-08-06 15:35:29,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1719. [2021-08-06 15:35:29,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.3963911525029102) internal successors, (5835), 1718 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:29,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5835 transitions. [2021-08-06 15:35:29,069 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5835 transitions. Word has length 27 [2021-08-06 15:35:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:29,069 INFO L470 AbstractCegarLoop]: Abstraction has 1719 states and 5835 transitions. [2021-08-06 15:35:29,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:29,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5835 transitions. [2021-08-06 15:35:29,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:29,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:29,073 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, 1, 1, 1, 1] [2021-08-06 15:35:29,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:29,297 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,SelfDestructingSolverStorable66 [2021-08-06 15:35:29,297 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:29,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:29,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1006198312, now seen corresponding path program 12 times [2021-08-06 15:35:29,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:29,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412133493] [2021-08-06 15:35:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:29,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:29,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:29,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412133493] [2021-08-06 15:35:29,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412133493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:29,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255169923] [2021-08-06 15:35:29,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:35:29,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:29,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:29,343 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:29,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 15:35:30,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:35:30,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:30,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:35:30,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:30,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255169923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:30,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:30,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:35:30,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552179468] [2021-08-06 15:35:30,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:35:30,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:35:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:35:30,605 INFO L87 Difference]: Start difference. First operand 1719 states and 5835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:30,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:30,795 INFO L93 Difference]: Finished difference Result 2232 states and 7209 transitions. [2021-08-06 15:35:30,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:35:30,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-08-06 15:35:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:30,799 INFO L225 Difference]: With dead ends: 2232 [2021-08-06 15:35:30,799 INFO L226 Difference]: Without dead ends: 2211 [2021-08-06 15:35:30,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:35:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-08-06 15:35:30,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1686. [2021-08-06 15:35:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.399406528189911) internal successors, (5728), 1685 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5728 transitions. [2021-08-06 15:35:30,827 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5728 transitions. Word has length 27 [2021-08-06 15:35:30,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:30,827 INFO L470 AbstractCegarLoop]: Abstraction has 1686 states and 5728 transitions. [2021-08-06 15:35:30,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:30,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5728 transitions. [2021-08-06 15:35:30,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:30,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:30,830 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, 1, 1] [2021-08-06 15:35:30,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-06 15:35:31,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:31,031 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:31,031 INFO L82 PathProgramCache]: Analyzing trace with hash 835683704, now seen corresponding path program 17 times [2021-08-06 15:35:31,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:31,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282586844] [2021-08-06 15:35:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:31,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:31,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:31,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282586844] [2021-08-06 15:35:31,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282586844] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:31,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624267657] [2021-08-06 15:35:31,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:35:31,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:31,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:31,082 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:31,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 15:35:32,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:35:32,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:32,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:32,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:32,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624267657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:32,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:32,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:35:32,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234270763] [2021-08-06 15:35:32,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:35:32,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:32,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:35:32,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:35:32,415 INFO L87 Difference]: Start difference. First operand 1686 states and 5728 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:32,973 INFO L93 Difference]: Finished difference Result 3478 states and 10820 transitions. [2021-08-06 15:35:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:35:32,973 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-08-06 15:35:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:32,979 INFO L225 Difference]: With dead ends: 3478 [2021-08-06 15:35:32,979 INFO L226 Difference]: Without dead ends: 3478 [2021-08-06 15:35:32,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 376.2ms TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:35:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-08-06 15:35:33,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 1866. [2021-08-06 15:35:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.4428954423592493) internal successors, (6421), 1865 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6421 transitions. [2021-08-06 15:35:33,030 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6421 transitions. Word has length 27 [2021-08-06 15:35:33,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:33,030 INFO L470 AbstractCegarLoop]: Abstraction has 1866 states and 6421 transitions. [2021-08-06 15:35:33,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:33,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6421 transitions. [2021-08-06 15:35:33,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:33,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:33,034 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, 1, 1] [2021-08-06 15:35:33,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:33,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:33,253 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1568145140, now seen corresponding path program 18 times [2021-08-06 15:35:33,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:33,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687649564] [2021-08-06 15:35:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:33,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:33,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:33,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687649564] [2021-08-06 15:35:33,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687649564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:33,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259250429] [2021-08-06 15:35:33,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:35:33,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:33,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:33,306 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:33,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 15:35:34,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:35:34,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:34,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:34,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:34,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259250429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:34,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:34,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:35:34,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468083566] [2021-08-06 15:35:34,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:35:34,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:34,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:35:34,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:35:34,638 INFO L87 Difference]: Start difference. First operand 1866 states and 6421 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:35,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:35,144 INFO L93 Difference]: Finished difference Result 3323 states and 10443 transitions. [2021-08-06 15:35:35,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:35:35,144 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 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 27 [2021-08-06 15:35:35,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:35,151 INFO L225 Difference]: With dead ends: 3323 [2021-08-06 15:35:35,152 INFO L226 Difference]: Without dead ends: 3319 [2021-08-06 15:35:35,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:35:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2021-08-06 15:35:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 1834. [2021-08-06 15:35:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 3.4451718494271684) internal successors, (6315), 1833 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6315 transitions. [2021-08-06 15:35:35,191 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6315 transitions. Word has length 27 [2021-08-06 15:35:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:35,192 INFO L470 AbstractCegarLoop]: Abstraction has 1834 states and 6315 transitions. [2021-08-06 15:35:35,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6315 transitions. [2021-08-06 15:35:35,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:35,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:35,195 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, 1, 1] [2021-08-06 15:35:35,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 15:35:35,397 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,SelfDestructingSolverStorable69 [2021-08-06 15:35:35,397 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:35,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:35,397 INFO L82 PathProgramCache]: Analyzing trace with hash -655941896, now seen corresponding path program 19 times [2021-08-06 15:35:35,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:35,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798892193] [2021-08-06 15:35:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:35,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:35,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:35,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798892193] [2021-08-06 15:35:35,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798892193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:35,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244586448] [2021-08-06 15:35:35,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:35:35,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:35,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:35,469 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:35,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 15:35:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:36,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:36,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244586448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:36,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:36,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:35:36,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062248618] [2021-08-06 15:35:36,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:35:36,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:36,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:35:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:35:36,832 INFO L87 Difference]: Start difference. First operand 1834 states and 6315 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:37,258 INFO L93 Difference]: Finished difference Result 3041 states and 9730 transitions. [2021-08-06 15:35:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:35:37,259 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:35:37,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:37,264 INFO L225 Difference]: With dead ends: 3041 [2021-08-06 15:35:37,264 INFO L226 Difference]: Without dead ends: 3029 [2021-08-06 15:35:37,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:35:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2021-08-06 15:35:37,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 1816. [2021-08-06 15:35:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.4512396694214877) internal successors, (6264), 1815 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6264 transitions. [2021-08-06 15:35:37,296 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6264 transitions. Word has length 27 [2021-08-06 15:35:37,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:37,297 INFO L470 AbstractCegarLoop]: Abstraction has 1816 states and 6264 transitions. [2021-08-06 15:35:37,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6264 transitions. [2021-08-06 15:35:37,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:37,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:37,299 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, 1, 1] [2021-08-06 15:35:37,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:37,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:37,500 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:37,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1624043128, now seen corresponding path program 20 times [2021-08-06 15:35:37,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:37,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817189469] [2021-08-06 15:35:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:37,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:37,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:37,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817189469] [2021-08-06 15:35:37,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817189469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:37,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566852552] [2021-08-06 15:35:37,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:35:37,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:37,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:37,576 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:37,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 15:35:38,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:35:38,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:38,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:38,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:38,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566852552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:38,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:38,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-06 15:35:38,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947485892] [2021-08-06 15:35:38,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:35:38,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:38,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:35:38,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:35:38,917 INFO L87 Difference]: Start difference. First operand 1816 states and 6264 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:39,436 INFO L93 Difference]: Finished difference Result 4165 states and 13261 transitions. [2021-08-06 15:35:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:35:39,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:35:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:39,443 INFO L225 Difference]: With dead ends: 4165 [2021-08-06 15:35:39,443 INFO L226 Difference]: Without dead ends: 4165 [2021-08-06 15:35:39,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 341.3ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:35:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-08-06 15:35:39,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 2008. [2021-08-06 15:35:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.5366218236173395) internal successors, (7098), 2007 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7098 transitions. [2021-08-06 15:35:39,517 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7098 transitions. Word has length 27 [2021-08-06 15:35:39,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:39,517 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 7098 transitions. [2021-08-06 15:35:39,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7098 transitions. [2021-08-06 15:35:39,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:39,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:39,522 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, 1, 1] [2021-08-06 15:35:39,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:39,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:39,735 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:39,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:39,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1212101640, now seen corresponding path program 21 times [2021-08-06 15:35:39,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:39,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507593663] [2021-08-06 15:35:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:39,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:39,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:39,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507593663] [2021-08-06 15:35:39,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507593663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:39,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240496000] [2021-08-06 15:35:39,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:35:39,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:39,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:39,787 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:39,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 15:35:40,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:35:40,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:40,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:40,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:41,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240496000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:41,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:41,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-06 15:35:41,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355815677] [2021-08-06 15:35:41,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:35:41,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:41,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:35:41,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:35:41,168 INFO L87 Difference]: Start difference. First operand 2008 states and 7098 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:41,702 INFO L93 Difference]: Finished difference Result 4184 states and 13322 transitions. [2021-08-06 15:35:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:35:41,702 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 15:35:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:41,709 INFO L225 Difference]: With dead ends: 4184 [2021-08-06 15:35:41,709 INFO L226 Difference]: Without dead ends: 4184 [2021-08-06 15:35:41,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 332.0ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:35:41,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4184 states. [2021-08-06 15:35:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4184 to 2009. [2021-08-06 15:35:41,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.5328685258964145) internal successors, (7094), 2008 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:41,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 7094 transitions. [2021-08-06 15:35:41,751 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 7094 transitions. Word has length 27 [2021-08-06 15:35:41,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:41,751 INFO L470 AbstractCegarLoop]: Abstraction has 2009 states and 7094 transitions. [2021-08-06 15:35:41,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 7094 transitions. [2021-08-06 15:35:41,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:41,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:41,754 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, 1, 1] [2021-08-06 15:35:41,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:41,957 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,SelfDestructingSolverStorable72 [2021-08-06 15:35:41,957 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:41,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:41,957 INFO L82 PathProgramCache]: Analyzing trace with hash -460972304, now seen corresponding path program 22 times [2021-08-06 15:35:41,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:41,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86153339] [2021-08-06 15:35:41,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:41,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:42,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:42,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86153339] [2021-08-06 15:35:42,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86153339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:42,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591144584] [2021-08-06 15:35:42,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:35:42,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:42,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:42,011 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:42,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 15:35:43,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:35:43,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:43,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:43,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:43,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591144584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:43,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:43,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 15:35:43,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518157055] [2021-08-06 15:35:43,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:35:43,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:43,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:35:43,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:35:43,410 INFO L87 Difference]: Start difference. First operand 2009 states and 7094 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:43,851 INFO L93 Difference]: Finished difference Result 3911 states and 12446 transitions. [2021-08-06 15:35:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:35:43,852 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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 27 [2021-08-06 15:35:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:43,877 INFO L225 Difference]: With dead ends: 3911 [2021-08-06 15:35:43,877 INFO L226 Difference]: Without dead ends: 3907 [2021-08-06 15:35:43,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:35:43,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-08-06 15:35:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2031. [2021-08-06 15:35:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 3.531527093596059) internal successors, (7169), 2030 states have internal predecessors, (7169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:43,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 7169 transitions. [2021-08-06 15:35:43,915 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 7169 transitions. Word has length 27 [2021-08-06 15:35:43,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:43,916 INFO L470 AbstractCegarLoop]: Abstraction has 2031 states and 7169 transitions. [2021-08-06 15:35:43,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:43,916 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 7169 transitions. [2021-08-06 15:35:43,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:43,919 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:43,919 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, 1, 1] [2021-08-06 15:35:43,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:44,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:44,119 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:44,119 INFO L82 PathProgramCache]: Analyzing trace with hash 517585140, now seen corresponding path program 23 times [2021-08-06 15:35:44,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:44,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453742425] [2021-08-06 15:35:44,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:44,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:44,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:44,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:44,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453742425] [2021-08-06 15:35:44,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453742425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:44,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937960059] [2021-08-06 15:35:44,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:35:44,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:44,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:44,172 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:44,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 15:35:45,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:35:45,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:45,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:45,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:35:45,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937960059] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:45,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:45,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 15:35:45,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173736138] [2021-08-06 15:35:45,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:35:45,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:35:45,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:35:45,542 INFO L87 Difference]: Start difference. First operand 2031 states and 7169 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:46,022 INFO L93 Difference]: Finished difference Result 4058 states and 12788 transitions. [2021-08-06 15:35:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:35:46,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 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 27 [2021-08-06 15:35:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:46,029 INFO L225 Difference]: With dead ends: 4058 [2021-08-06 15:35:46,029 INFO L226 Difference]: Without dead ends: 4058 [2021-08-06 15:35:46,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:35:46,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-08-06 15:35:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 2015. [2021-08-06 15:35:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.5307845084409135) internal successors, (7111), 2014 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:46,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7111 transitions. [2021-08-06 15:35:46,076 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7111 transitions. Word has length 27 [2021-08-06 15:35:46,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:46,076 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 7111 transitions. [2021-08-06 15:35:46,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:46,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7111 transitions. [2021-08-06 15:35:46,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:46,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:46,081 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, 1, 1] [2021-08-06 15:35:46,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 15:35:46,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-06 15:35:46,294 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:46,295 INFO L82 PathProgramCache]: Analyzing trace with hash 163397368, now seen corresponding path program 24 times [2021-08-06 15:35:46,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:46,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532362048] [2021-08-06 15:35:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:46,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:46,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:46,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532362048] [2021-08-06 15:35:46,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532362048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:46,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94778278] [2021-08-06 15:35:46,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:35:46,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:46,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:46,366 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:46,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 15:35:47,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:35:47,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:47,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:47,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:47,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94778278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:47,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:47,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:35:47,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334700263] [2021-08-06 15:35:47,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:35:47,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:47,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:35:47,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:35:47,732 INFO L87 Difference]: Start difference. First operand 2015 states and 7111 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:48,091 INFO L93 Difference]: Finished difference Result 3346 states and 10911 transitions. [2021-08-06 15:35:48,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:35:48,092 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-08-06 15:35:48,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:48,097 INFO L225 Difference]: With dead ends: 3346 [2021-08-06 15:35:48,098 INFO L226 Difference]: Without dead ends: 3334 [2021-08-06 15:35:48,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:35:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-08-06 15:35:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2049. [2021-08-06 15:35:48,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.5244140625) internal successors, (7218), 2048 states have internal predecessors, (7218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:48,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 7218 transitions. [2021-08-06 15:35:48,135 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 7218 transitions. Word has length 27 [2021-08-06 15:35:48,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:48,136 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 7218 transitions. [2021-08-06 15:35:48,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:48,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 7218 transitions. [2021-08-06 15:35:48,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:48,139 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:48,139 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, 1, 1] [2021-08-06 15:35:48,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:48,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-06 15:35:48,340 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:48,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:48,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1085099508, now seen corresponding path program 25 times [2021-08-06 15:35:48,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:48,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783507809] [2021-08-06 15:35:48,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:48,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:48,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:48,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783507809] [2021-08-06 15:35:48,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783507809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:48,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023315885] [2021-08-06 15:35:48,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:35:48,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:48,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:48,399 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:48,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 15:35:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:49,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:49,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:49,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023315885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:49,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:49,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:35:49,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746871587] [2021-08-06 15:35:49,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:35:49,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:49,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:35:49,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:35:49,787 INFO L87 Difference]: Start difference. First operand 2049 states and 7218 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:50,236 INFO L93 Difference]: Finished difference Result 3635 states and 11672 transitions. [2021-08-06 15:35:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:35:50,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-08-06 15:35:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:50,243 INFO L225 Difference]: With dead ends: 3635 [2021-08-06 15:35:50,243 INFO L226 Difference]: Without dead ends: 3631 [2021-08-06 15:35:50,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:35:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-08-06 15:35:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 2132. [2021-08-06 15:35:50,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 3.5152510558423273) internal successors, (7491), 2131 states have internal predecessors, (7491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:50,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 7491 transitions. [2021-08-06 15:35:50,299 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 7491 transitions. Word has length 27 [2021-08-06 15:35:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:50,299 INFO L470 AbstractCegarLoop]: Abstraction has 2132 states and 7491 transitions. [2021-08-06 15:35:50,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 7491 transitions. [2021-08-06 15:35:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 15:35:50,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:50,302 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, 1, 1] [2021-08-06 15:35:50,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 15:35:50,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:50,502 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:50,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:50,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2063656952, now seen corresponding path program 26 times [2021-08-06 15:35:50,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:50,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51068031] [2021-08-06 15:35:50,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:50,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:50,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:50,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:50,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51068031] [2021-08-06 15:35:50,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51068031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:50,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020122377] [2021-08-06 15:35:50,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:35:50,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:50,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:50,556 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:50,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 15:35:51,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:35:51,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:51,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:35:51,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:51,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020122377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:51,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:51,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:35:51,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876597513] [2021-08-06 15:35:51,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:35:51,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:51,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:35:51,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:35:51,976 INFO L87 Difference]: Start difference. First operand 2132 states and 7491 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:52,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:52,477 INFO L93 Difference]: Finished difference Result 3810 states and 12119 transitions. [2021-08-06 15:35:52,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:35:52,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 27 [2021-08-06 15:35:52,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:52,484 INFO L225 Difference]: With dead ends: 3810 [2021-08-06 15:35:52,484 INFO L226 Difference]: Without dead ends: 3810 [2021-08-06 15:35:52,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:35:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-08-06 15:35:52,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 2086. [2021-08-06 15:35:52,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 3.51462829736211) internal successors, (7328), 2085 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 7328 transitions. [2021-08-06 15:35:52,525 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 7328 transitions. Word has length 27 [2021-08-06 15:35:52,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:52,525 INFO L470 AbstractCegarLoop]: Abstraction has 2086 states and 7328 transitions. [2021-08-06 15:35:52,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 7328 transitions. [2021-08-06 15:35:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:35:52,528 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:52,529 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:52,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:52,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:52,731 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:52,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:52,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2115322266, now seen corresponding path program 29 times [2021-08-06 15:35:52,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:52,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826014172] [2021-08-06 15:35:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:52,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:53,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:53,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826014172] [2021-08-06 15:35:53,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826014172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:53,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516435025] [2021-08-06 15:35:53,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:35:53,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:53,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:53,226 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:53,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 15:35:54,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:35:54,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:35:54,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:35:54,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:35:55,570 INFO L354 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2021-08-06 15:35:55,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 98 treesize of output 106 [2021-08-06 15:35:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:56,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516435025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:56,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:35:56,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-08-06 15:35:56,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861940281] [2021-08-06 15:35:56,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:35:56,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:35:56,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:35:56,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:35:56,893 INFO L87 Difference]: Start difference. First operand 2086 states and 7328 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:58,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:35:58,588 INFO L93 Difference]: Finished difference Result 2908 states and 9951 transitions. [2021-08-06 15:35:58,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:35:58,589 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:35:58,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:35:58,594 INFO L225 Difference]: With dead ends: 2908 [2021-08-06 15:35:58,594 INFO L226 Difference]: Without dead ends: 2878 [2021-08-06 15:35:58,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1571.5ms TimeCoverageRelationStatistics Valid=410, Invalid=1752, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:35:58,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2021-08-06 15:35:58,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2109. [2021-08-06 15:35:58,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2109 states, 2108 states have (on average 3.5132827324478177) internal successors, (7406), 2108 states have internal predecessors, (7406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2109 states to 2109 states and 7406 transitions. [2021-08-06 15:35:58,630 INFO L78 Accepts]: Start accepts. Automaton has 2109 states and 7406 transitions. Word has length 29 [2021-08-06 15:35:58,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:35:58,630 INFO L470 AbstractCegarLoop]: Abstraction has 2109 states and 7406 transitions. [2021-08-06 15:35:58,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:35:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2109 states and 7406 transitions. [2021-08-06 15:35:58,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:35:58,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:35:58,635 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:35:58,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 15:35:58,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-06 15:35:58,856 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:35:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:35:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash -112165754, now seen corresponding path program 30 times [2021-08-06 15:35:58,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:35:58,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970078589] [2021-08-06 15:35:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:35:58,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:35:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:35:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:35:59,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:35:59,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970078589] [2021-08-06 15:35:59,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970078589] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:35:59,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903795265] [2021-08-06 15:35:59,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:35:59,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:35:59,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:35:59,256 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:35:59,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 15:36:00,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:36:00,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:00,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:36:00,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:01,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:01,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:01,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:01,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:01,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:01,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:01,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:36:01,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 106 [2021-08-06 15:36:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:02,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903795265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:02,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:02,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-08-06 15:36:02,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439647977] [2021-08-06 15:36:02,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:36:02,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:02,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:36:02,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:36:02,722 INFO L87 Difference]: Start difference. First operand 2109 states and 7406 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-08-06 15:36:04,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:04,432 INFO L93 Difference]: Finished difference Result 3102 states and 10549 transitions. [2021-08-06 15:36:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:36:04,432 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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 29 [2021-08-06 15:36:04,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:04,437 INFO L225 Difference]: With dead ends: 3102 [2021-08-06 15:36:04,437 INFO L226 Difference]: Without dead ends: 3052 [2021-08-06 15:36:04,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1611.2ms TimeCoverageRelationStatistics Valid=380, Invalid=1690, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:36:04,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-08-06 15:36:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2131. [2021-08-06 15:36:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.507981220657277) internal successors, (7472), 2130 states have internal predecessors, (7472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7472 transitions. [2021-08-06 15:36:04,470 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7472 transitions. Word has length 29 [2021-08-06 15:36:04,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:04,470 INFO L470 AbstractCegarLoop]: Abstraction has 2131 states and 7472 transitions. [2021-08-06 15:36:04,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-08-06 15:36:04,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7472 transitions. [2021-08-06 15:36:04,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:36:04,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:04,473 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:04,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 15:36:04,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-06 15:36:04,673 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:04,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:04,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1811876938, now seen corresponding path program 31 times [2021-08-06 15:36:04,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:04,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913273159] [2021-08-06 15:36:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:04,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:05,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:05,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913273159] [2021-08-06 15:36:05,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913273159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:05,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122552416] [2021-08-06 15:36:05,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:36:05,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:05,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:05,075 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:05,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 15:36:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:06,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:36:06,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:07,089 INFO L354 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2021-08-06 15:36:07,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 102 treesize of output 106 [2021-08-06 15:36:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:08,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122552416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:08,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:08,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-06 15:36:08,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630749027] [2021-08-06 15:36:08,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:36:08,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:08,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:36:08,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:36:08,613 INFO L87 Difference]: Start difference. First operand 2131 states and 7472 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:10,022 INFO L93 Difference]: Finished difference Result 3348 states and 11318 transitions. [2021-08-06 15:36:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:36:10,022 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:36:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:10,029 INFO L225 Difference]: With dead ends: 3348 [2021-08-06 15:36:10,029 INFO L226 Difference]: Without dead ends: 3304 [2021-08-06 15:36:10,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1297.8ms TimeCoverageRelationStatistics Valid=392, Invalid=1588, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:36:10,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2021-08-06 15:36:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 2164. [2021-08-06 15:36:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 3.5053166897827093) internal successors, (7582), 2163 states have internal predecessors, (7582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 7582 transitions. [2021-08-06 15:36:10,069 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 7582 transitions. Word has length 29 [2021-08-06 15:36:10,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:10,069 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 7582 transitions. [2021-08-06 15:36:10,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 7582 transitions. [2021-08-06 15:36:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:36:10,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:10,072 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:10,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:10,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:10,273 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:10,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1648467328, now seen corresponding path program 32 times [2021-08-06 15:36:10,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:10,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654767281] [2021-08-06 15:36:10,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:10,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:10,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:10,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654767281] [2021-08-06 15:36:10,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654767281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:10,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736050835] [2021-08-06 15:36:10,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:36:10,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:10,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:10,664 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:10,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 15:36:12,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:36:12,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:12,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:36:12,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:12,874 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 15:36:12,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 102 treesize of output 67 [2021-08-06 15:36:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:13,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736050835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:13,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:13,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-06 15:36:13,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271051127] [2021-08-06 15:36:13,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:36:13,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:13,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:36:13,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:36:13,119 INFO L87 Difference]: Start difference. First operand 2164 states and 7582 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:14,220 INFO L93 Difference]: Finished difference Result 2919 states and 10011 transitions. [2021-08-06 15:36:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:36:14,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:36:14,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:14,226 INFO L225 Difference]: With dead ends: 2919 [2021-08-06 15:36:14,226 INFO L226 Difference]: Without dead ends: 2889 [2021-08-06 15:36:14,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1108.7ms TimeCoverageRelationStatistics Valid=307, Invalid=1333, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:36:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2889 states. [2021-08-06 15:36:14,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2889 to 2164. [2021-08-06 15:36:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 3.5053166897827093) internal successors, (7582), 2163 states have internal predecessors, (7582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 7582 transitions. [2021-08-06 15:36:14,257 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 7582 transitions. Word has length 29 [2021-08-06 15:36:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:14,257 INFO L470 AbstractCegarLoop]: Abstraction has 2164 states and 7582 transitions. [2021-08-06 15:36:14,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 7582 transitions. [2021-08-06 15:36:14,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:36:14,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:14,260 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, 1, 1, 1, 1] [2021-08-06 15:36:14,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 15:36:14,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:14,465 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:14,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1683970150, now seen corresponding path program 13 times [2021-08-06 15:36:14,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:14,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28802389] [2021-08-06 15:36:14,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:14,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:15,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:15,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28802389] [2021-08-06 15:36:15,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28802389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:15,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872678523] [2021-08-06 15:36:15,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:36:15,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:15,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:15,166 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:15,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 15:36:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:16,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:36:16,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:18,041 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 15:36:18,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 56 [2021-08-06 15:36:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:18,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872678523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:18,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:18,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-08-06 15:36:18,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055095938] [2021-08-06 15:36:18,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:36:18,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:18,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:36:18,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:36:18,255 INFO L87 Difference]: Start difference. First operand 2164 states and 7582 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:21,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:21,144 INFO L93 Difference]: Finished difference Result 3489 states and 11784 transitions. [2021-08-06 15:36:21,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:36:21,145 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:36:21,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:21,152 INFO L225 Difference]: With dead ends: 3489 [2021-08-06 15:36:21,152 INFO L226 Difference]: Without dead ends: 3474 [2021-08-06 15:36:21,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 2676.8ms TimeCoverageRelationStatistics Valid=522, Invalid=2448, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 15:36:21,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3474 states. [2021-08-06 15:36:21,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3474 to 2174. [2021-08-06 15:36:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 3.5025310630464794) internal successors, (7611), 2173 states have internal predecessors, (7611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 7611 transitions. [2021-08-06 15:36:21,194 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 7611 transitions. Word has length 29 [2021-08-06 15:36:21,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:21,194 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 7611 transitions. [2021-08-06 15:36:21,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 7611 transitions. [2021-08-06 15:36:21,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:36:21,197 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:21,197 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, 1, 1, 1, 1] [2021-08-06 15:36:21,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-06 15:36:21,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-08-06 15:36:21,398 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:21,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:21,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1904823894, now seen corresponding path program 14 times [2021-08-06 15:36:21,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:21,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671701033] [2021-08-06 15:36:21,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:21,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:22,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:22,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:22,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671701033] [2021-08-06 15:36:22,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671701033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:22,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232182632] [2021-08-06 15:36:22,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:36:22,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:22,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:22,187 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:22,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 15:36:23,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:36:23,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:23,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:36:23,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:24,897 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:36:24,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 88 treesize of output 76 [2021-08-06 15:36:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:25,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232182632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:25,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:25,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-08-06 15:36:25,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830404585] [2021-08-06 15:36:25,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:36:25,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:25,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:36:25,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:36:25,816 INFO L87 Difference]: Start difference. First operand 2174 states and 7611 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:29,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:29,870 INFO L93 Difference]: Finished difference Result 4222 states and 14000 transitions. [2021-08-06 15:36:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 15:36:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:36:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:29,878 INFO L225 Difference]: With dead ends: 4222 [2021-08-06 15:36:29,878 INFO L226 Difference]: Without dead ends: 4207 [2021-08-06 15:36:29,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 3877.0ms TimeCoverageRelationStatistics Valid=767, Invalid=3789, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 15:36:29,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4207 states. [2021-08-06 15:36:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4207 to 2176. [2021-08-06 15:36:29,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.503448275862069) internal successors, (7620), 2175 states have internal predecessors, (7620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7620 transitions. [2021-08-06 15:36:29,918 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7620 transitions. Word has length 29 [2021-08-06 15:36:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:29,918 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 7620 transitions. [2021-08-06 15:36:29,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:29,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7620 transitions. [2021-08-06 15:36:29,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:36:29,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:29,921 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, 1, 1, 1, 1] [2021-08-06 15:36:29,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:30,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:30,121 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:30,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:30,122 INFO L82 PathProgramCache]: Analyzing trace with hash -644859366, now seen corresponding path program 15 times [2021-08-06 15:36:30,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:30,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613744082] [2021-08-06 15:36:30,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:30,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:30,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:30,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:30,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613744082] [2021-08-06 15:36:30,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613744082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:30,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766936728] [2021-08-06 15:36:30,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:36:30,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:30,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:30,885 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:30,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 15:36:32,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:36:32,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:32,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:36:32,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:33,621 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:36:33,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 99 treesize of output 87 [2021-08-06 15:36:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:34,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766936728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:34,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:34,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-08-06 15:36:34,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008001907] [2021-08-06 15:36:34,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:36:34,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:36:34,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:36:34,450 INFO L87 Difference]: Start difference. First operand 2176 states and 7620 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:37,185 INFO L93 Difference]: Finished difference Result 3610 states and 12174 transitions. [2021-08-06 15:36:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:36:37,185 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:36:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:37,192 INFO L225 Difference]: With dead ends: 3610 [2021-08-06 15:36:37,192 INFO L226 Difference]: Without dead ends: 3585 [2021-08-06 15:36:37,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2663.5ms TimeCoverageRelationStatistics Valid=511, Invalid=2141, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 15:36:37,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-08-06 15:36:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 2180. [2021-08-06 15:36:37,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.502524093620927) internal successors, (7632), 2179 states have internal predecessors, (7632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:37,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 7632 transitions. [2021-08-06 15:36:37,236 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 7632 transitions. Word has length 29 [2021-08-06 15:36:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:37,236 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 7632 transitions. [2021-08-06 15:36:37,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 7632 transitions. [2021-08-06 15:36:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:36:37,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:37,240 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, 1, 1, 1, 1] [2021-08-06 15:36:37,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:37,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:37,440 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:37,440 INFO L82 PathProgramCache]: Analyzing trace with hash 631467606, now seen corresponding path program 16 times [2021-08-06 15:36:37,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:37,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487582939] [2021-08-06 15:36:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:37,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:37,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:37,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487582939] [2021-08-06 15:36:37,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487582939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:37,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444556007] [2021-08-06 15:36:37,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:36:37,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:37,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:37,955 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:37,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 15:36:39,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:36:39,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:39,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:36:39,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:40,678 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:36:40,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 97 treesize of output 85 [2021-08-06 15:36:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:41,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444556007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:41,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:41,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:36:41,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766955681] [2021-08-06 15:36:41,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:36:41,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:41,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:36:41,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:36:41,375 INFO L87 Difference]: Start difference. First operand 2180 states and 7632 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:42,453 INFO L93 Difference]: Finished difference Result 3038 states and 10393 transitions. [2021-08-06 15:36:42,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:36:42,454 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:36:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:42,459 INFO L225 Difference]: With dead ends: 3038 [2021-08-06 15:36:42,459 INFO L226 Difference]: Without dead ends: 3013 [2021-08-06 15:36:42,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1123.8ms TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:36:42,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-08-06 15:36:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2202. [2021-08-06 15:36:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 3.497046796910495) internal successors, (7697), 2201 states have internal predecessors, (7697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 7697 transitions. [2021-08-06 15:36:42,496 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 7697 transitions. Word has length 29 [2021-08-06 15:36:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:42,496 INFO L470 AbstractCegarLoop]: Abstraction has 2202 states and 7697 transitions. [2021-08-06 15:36:42,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 7697 transitions. [2021-08-06 15:36:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:36:42,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:42,500 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, 1, 1, 1, 1] [2021-08-06 15:36:42,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:42,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:42,701 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:42,701 INFO L82 PathProgramCache]: Analyzing trace with hash 207156370, now seen corresponding path program 17 times [2021-08-06 15:36:42,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:42,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412720996] [2021-08-06 15:36:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:42,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:43,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:43,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412720996] [2021-08-06 15:36:43,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412720996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:43,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765800857] [2021-08-06 15:36:43,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:36:43,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:43,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:43,112 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:43,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 15:36:45,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:36:45,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:45,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:36:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:46,035 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:36:46,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 99 treesize of output 87 [2021-08-06 15:36:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:46,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765800857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:46,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:46,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 15:36:46,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517962814] [2021-08-06 15:36:46,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:36:46,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:46,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:36:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:36:46,563 INFO L87 Difference]: Start difference. First operand 2202 states and 7697 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:48,700 INFO L93 Difference]: Finished difference Result 3119 states and 10582 transitions. [2021-08-06 15:36:48,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:36:48,700 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 29 [2021-08-06 15:36:48,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:48,705 INFO L225 Difference]: With dead ends: 3119 [2021-08-06 15:36:48,705 INFO L226 Difference]: Without dead ends: 3069 [2021-08-06 15:36:48,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1984.9ms TimeCoverageRelationStatistics Valid=491, Invalid=2161, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 15:36:48,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-08-06 15:36:48,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 2228. [2021-08-06 15:36:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 3.494836102379883) internal successors, (7783), 2227 states have internal predecessors, (7783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:48,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 7783 transitions. [2021-08-06 15:36:48,742 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 7783 transitions. Word has length 29 [2021-08-06 15:36:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:48,742 INFO L470 AbstractCegarLoop]: Abstraction has 2228 states and 7783 transitions. [2021-08-06 15:36:48,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 7783 transitions. [2021-08-06 15:36:48,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:36:48,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:48,745 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, 1, 1, 1, 1] [2021-08-06 15:36:48,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 15:36:48,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-06 15:36:48,946 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:48,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:48,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1482786534, now seen corresponding path program 18 times [2021-08-06 15:36:48,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:48,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057149075] [2021-08-06 15:36:48,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:48,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:49,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:49,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057149075] [2021-08-06 15:36:49,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057149075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:49,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953184281] [2021-08-06 15:36:49,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:36:49,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:49,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:49,395 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:49,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 15:36:51,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:36:51,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:51,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:36:51,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:52,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:52,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:52,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:52,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:52,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:52,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:52,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:36:52,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:36:52,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 83 [2021-08-06 15:36:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:53,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953184281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:53,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:36:53,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 15:36:53,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119302969] [2021-08-06 15:36:53,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:36:53,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:36:53,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:36:53,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:36:53,048 INFO L87 Difference]: Start difference. First operand 2228 states and 7783 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-08-06 15:36:55,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:36:55,717 INFO L93 Difference]: Finished difference Result 3197 states and 10804 transitions. [2021-08-06 15:36:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:36:55,717 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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 29 [2021-08-06 15:36:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:36:55,723 INFO L225 Difference]: With dead ends: 3197 [2021-08-06 15:36:55,723 INFO L226 Difference]: Without dead ends: 3161 [2021-08-06 15:36:55,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 2399.3ms TimeCoverageRelationStatistics Valid=377, Invalid=1975, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:36:55,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-08-06 15:36:55,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 2270. [2021-08-06 15:36:55,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 3.49228735125606) internal successors, (7924), 2269 states have internal predecessors, (7924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:36:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 7924 transitions. [2021-08-06 15:36:55,760 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 7924 transitions. Word has length 29 [2021-08-06 15:36:55,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:36:55,760 INFO L470 AbstractCegarLoop]: Abstraction has 2270 states and 7924 transitions. [2021-08-06 15:36:55,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-08-06 15:36:55,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 7924 transitions. [2021-08-06 15:36:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:36:55,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:36:55,764 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:36:55,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 15:36:55,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 15:36:55,964 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:36:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:36:55,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1035490966, now seen corresponding path program 33 times [2021-08-06 15:36:55,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:36:55,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394920850] [2021-08-06 15:36:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:36:55,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:36:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:36:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:36:56,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:36:56,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394920850] [2021-08-06 15:36:56,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394920850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:36:56,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733677295] [2021-08-06 15:36:56,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:36:56,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:36:56,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:36:56,505 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:36:56,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 15:36:58,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:36:58,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:36:58,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:36:58,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:36:59,224 INFO L354 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2021-08-06 15:36:59,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 102 treesize of output 106 [2021-08-06 15:37:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:00,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733677295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:00,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:00,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2021-08-06 15:37:00,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820410893] [2021-08-06 15:37:00,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:37:00,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:00,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:37:00,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:37:00,475 INFO L87 Difference]: Start difference. First operand 2270 states and 7924 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:03,598 INFO L93 Difference]: Finished difference Result 4044 states and 13541 transitions. [2021-08-06 15:37:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-06 15:37:03,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:37:03,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:03,606 INFO L225 Difference]: With dead ends: 4044 [2021-08-06 15:37:03,606 INFO L226 Difference]: Without dead ends: 4007 [2021-08-06 15:37:03,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 2898.2ms TimeCoverageRelationStatistics Valid=894, Invalid=3662, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 15:37:03,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-08-06 15:37:03,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 2365. [2021-08-06 15:37:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.498730964467005) internal successors, (8271), 2364 states have internal predecessors, (8271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 8271 transitions. [2021-08-06 15:37:03,653 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 8271 transitions. Word has length 29 [2021-08-06 15:37:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:03,653 INFO L470 AbstractCegarLoop]: Abstraction has 2365 states and 8271 transitions. [2021-08-06 15:37:03,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 8271 transitions. [2021-08-06 15:37:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:37:03,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:03,658 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:03,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:03,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-06 15:37:03,873 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:03,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:03,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1870113996, now seen corresponding path program 34 times [2021-08-06 15:37:03,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:03,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920568808] [2021-08-06 15:37:03,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:03,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:04,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:04,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920568808] [2021-08-06 15:37:04,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920568808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:04,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495562925] [2021-08-06 15:37:04,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:37:04,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:04,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:04,346 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:04,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 15:37:06,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:37:06,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:06,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:37:06,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:07,428 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 15:37:07,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 102 treesize of output 67 [2021-08-06 15:37:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:07,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495562925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:07,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:07,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2021-08-06 15:37:07,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539723065] [2021-08-06 15:37:07,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:37:07,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:07,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:37:07,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:37:07,676 INFO L87 Difference]: Start difference. First operand 2365 states and 8271 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:10,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:10,139 INFO L93 Difference]: Finished difference Result 3923 states and 13196 transitions. [2021-08-06 15:37:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:37:10,139 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:37:10,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:10,146 INFO L225 Difference]: With dead ends: 3923 [2021-08-06 15:37:10,146 INFO L226 Difference]: Without dead ends: 3893 [2021-08-06 15:37:10,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 2306.9ms TimeCoverageRelationStatistics Valid=619, Invalid=2803, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 15:37:10,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3893 states. [2021-08-06 15:37:10,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3893 to 2379. [2021-08-06 15:37:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 3.4970563498738434) internal successors, (8316), 2378 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 8316 transitions. [2021-08-06 15:37:10,191 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 8316 transitions. Word has length 29 [2021-08-06 15:37:10,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:10,191 INFO L470 AbstractCegarLoop]: Abstraction has 2379 states and 8316 transitions. [2021-08-06 15:37:10,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 8316 transitions. [2021-08-06 15:37:10,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:37:10,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:10,194 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, 1, 1, 1, 1] [2021-08-06 15:37:10,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:10,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-06 15:37:10,395 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:10,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1380394858, now seen corresponding path program 19 times [2021-08-06 15:37:10,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:10,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893579155] [2021-08-06 15:37:10,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:10,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:11,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:11,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893579155] [2021-08-06 15:37:11,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893579155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:11,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867951744] [2021-08-06 15:37:11,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:37:11,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:11,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:11,122 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:11,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 15:37:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:13,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:37:13,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:14,673 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 15:37:14,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 90 treesize of output 60 [2021-08-06 15:37:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:14,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867951744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:14,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:14,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-08-06 15:37:14,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680625627] [2021-08-06 15:37:14,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:37:14,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:14,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:37:14,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:37:14,878 INFO L87 Difference]: Start difference. First operand 2379 states and 8316 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:19,938 INFO L93 Difference]: Finished difference Result 4377 states and 14460 transitions. [2021-08-06 15:37:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 15:37:19,938 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:37:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:19,946 INFO L225 Difference]: With dead ends: 4377 [2021-08-06 15:37:19,946 INFO L226 Difference]: Without dead ends: 4362 [2021-08-06 15:37:19,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 4442.5ms TimeCoverageRelationStatistics Valid=758, Invalid=4498, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 15:37:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4362 states. [2021-08-06 15:37:19,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4362 to 2398. [2021-08-06 15:37:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 3.49520233625365) internal successors, (8378), 2397 states have internal predecessors, (8378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 8378 transitions. [2021-08-06 15:37:19,991 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 8378 transitions. Word has length 29 [2021-08-06 15:37:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:19,991 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 8378 transitions. [2021-08-06 15:37:19,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 8378 transitions. [2021-08-06 15:37:19,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:37:19,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:19,994 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, 1, 1, 1, 1] [2021-08-06 15:37:20,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-06 15:37:20,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:20,195 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:20,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:20,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2086568110, now seen corresponding path program 20 times [2021-08-06 15:37:20,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:20,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054782641] [2021-08-06 15:37:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:20,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:20,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:20,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054782641] [2021-08-06 15:37:20,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054782641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:20,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263067843] [2021-08-06 15:37:20,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:37:20,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:20,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:20,931 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:20,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 15:37:23,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:37:23,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:23,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:37:23,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:23,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:37:23,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:37:23,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:37:23,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:37:24,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:37:24,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 70 [2021-08-06 15:37:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:24,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263067843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:24,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:24,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-08-06 15:37:24,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913188532] [2021-08-06 15:37:24,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:37:24,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:37:24,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:37:24,682 INFO L87 Difference]: Start difference. First operand 2398 states and 8378 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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) [2021-08-06 15:37:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:37,032 INFO L93 Difference]: Finished difference Result 5254 states and 17140 transitions. [2021-08-06 15:37:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-08-06 15:37:37,033 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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 29 [2021-08-06 15:37:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:37,042 INFO L225 Difference]: With dead ends: 5254 [2021-08-06 15:37:37,042 INFO L226 Difference]: Without dead ends: 5209 [2021-08-06 15:37:37,043 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4920 ImplicationChecksByTransitivity, 10930.0ms TimeCoverageRelationStatistics Valid=1455, Invalid=11885, Unknown=0, NotChecked=0, Total=13340 [2021-08-06 15:37:37,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5209 states. [2021-08-06 15:37:37,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5209 to 2404. [2021-08-06 15:37:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 2403 states have (on average 3.4993757802746566) internal successors, (8409), 2403 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:37,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 8409 transitions. [2021-08-06 15:37:37,097 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 8409 transitions. Word has length 29 [2021-08-06 15:37:37,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:37,097 INFO L470 AbstractCegarLoop]: Abstraction has 2404 states and 8409 transitions. [2021-08-06 15:37:37,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 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) [2021-08-06 15:37:37,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 8409 transitions. [2021-08-06 15:37:37,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:37:37,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:37,100 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, 1, 1, 1, 1] [2021-08-06 15:37:37,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 15:37:37,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:37,301 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:37,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:37,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1159012610, now seen corresponding path program 21 times [2021-08-06 15:37:37,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:37,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757358025] [2021-08-06 15:37:37,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:37,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:38,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:38,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757358025] [2021-08-06 15:37:38,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757358025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:38,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512152682] [2021-08-06 15:37:38,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:37:38,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:38,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:38,169 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:38,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 15:37:40,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:37:40,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:40,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:37:40,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:41,745 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 15:37:41,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 90 treesize of output 60 [2021-08-06 15:37:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:41,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512152682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:41,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:41,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-08-06 15:37:41,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144238309] [2021-08-06 15:37:41,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:37:41,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:41,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:37:41,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:37:41,938 INFO L87 Difference]: Start difference. First operand 2404 states and 8409 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:46,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:46,748 INFO L93 Difference]: Finished difference Result 4086 states and 13808 transitions. [2021-08-06 15:37:46,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 15:37:46,748 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:37:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:46,757 INFO L225 Difference]: With dead ends: 4086 [2021-08-06 15:37:46,757 INFO L226 Difference]: Without dead ends: 4071 [2021-08-06 15:37:46,758 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 4352.3ms TimeCoverageRelationStatistics Valid=664, Invalid=3626, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 15:37:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-08-06 15:37:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 2411. [2021-08-06 15:37:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 3.499170124481328) internal successors, (8433), 2410 states have internal predecessors, (8433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 8433 transitions. [2021-08-06 15:37:46,810 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 8433 transitions. Word has length 29 [2021-08-06 15:37:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:46,811 INFO L470 AbstractCegarLoop]: Abstraction has 2411 states and 8433 transitions. [2021-08-06 15:37:46,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 8433 transitions. [2021-08-06 15:37:46,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:37:46,815 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:46,815 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, 1, 1, 1, 1] [2021-08-06 15:37:46,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-06 15:37:47,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:47,029 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:47,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1133880174, now seen corresponding path program 22 times [2021-08-06 15:37:47,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:47,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721606172] [2021-08-06 15:37:47,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:47,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:47,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:47,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721606172] [2021-08-06 15:37:47,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721606172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:47,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562148594] [2021-08-06 15:37:47,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:37:47,816 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:47,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:47,817 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:47,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 15:37:50,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:37:50,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:50,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:37:50,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:51,325 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:37:51,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 94 treesize of output 82 [2021-08-06 15:37:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:51,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562148594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:51,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:37:51,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-08-06 15:37:51,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864227007] [2021-08-06 15:37:51,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:37:51,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:37:51,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:37:51,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:37:51,774 INFO L87 Difference]: Start difference. First operand 2411 states and 8433 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:55,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:37:55,565 INFO L93 Difference]: Finished difference Result 4455 states and 14988 transitions. [2021-08-06 15:37:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 15:37:55,566 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:37:55,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:37:55,577 INFO L225 Difference]: With dead ends: 4455 [2021-08-06 15:37:55,577 INFO L226 Difference]: Without dead ends: 4425 [2021-08-06 15:37:55,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 3497.4ms TimeCoverageRelationStatistics Valid=649, Invalid=2891, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:37:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4425 states. [2021-08-06 15:37:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4425 to 2410. [2021-08-06 15:37:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 2409 states have (on average 3.501452885014529) internal successors, (8435), 2409 states have internal predecessors, (8435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 8435 transitions. [2021-08-06 15:37:55,636 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 8435 transitions. Word has length 29 [2021-08-06 15:37:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:37:55,636 INFO L470 AbstractCegarLoop]: Abstraction has 2410 states and 8435 transitions. [2021-08-06 15:37:55,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:37:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 8435 transitions. [2021-08-06 15:37:55,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:37:55,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:37:55,639 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:37:55,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 15:37:55,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:55,840 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:37:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:37:55,840 INFO L82 PathProgramCache]: Analyzing trace with hash -911556910, now seen corresponding path program 35 times [2021-08-06 15:37:55,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:37:55,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633961793] [2021-08-06 15:37:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:37:55,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:37:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:37:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:37:56,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:37:56,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633961793] [2021-08-06 15:37:56,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633961793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:37:56,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382132892] [2021-08-06 15:37:56,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:37:56,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:37:56,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:37:56,283 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:37:56,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 15:37:58,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:37:58,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:37:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:37:58,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:37:59,594 INFO L354 Elim1Store]: treesize reduction 42, result has 64.1 percent of original size [2021-08-06 15:37:59,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 102 treesize of output 136 [2021-08-06 15:38:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:02,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382132892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:02,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:02,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-08-06 15:38:02,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333631253] [2021-08-06 15:38:02,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:38:02,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:02,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:38:02,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:38:02,150 INFO L87 Difference]: Start difference. First operand 2410 states and 8435 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:05,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:05,932 INFO L93 Difference]: Finished difference Result 4296 states and 14290 transitions. [2021-08-06 15:38:05,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 15:38:05,933 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:38:05,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:05,941 INFO L225 Difference]: With dead ends: 4296 [2021-08-06 15:38:05,941 INFO L226 Difference]: Without dead ends: 4266 [2021-08-06 15:38:05,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 3359.2ms TimeCoverageRelationStatistics Valid=975, Invalid=4281, Unknown=0, NotChecked=0, Total=5256 [2021-08-06 15:38:05,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-08-06 15:38:05,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 2434. [2021-08-06 15:38:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 2433 states have (on average 3.5076037813399097) internal successors, (8534), 2433 states have internal predecessors, (8534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:05,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 8534 transitions. [2021-08-06 15:38:05,991 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 8534 transitions. Word has length 29 [2021-08-06 15:38:05,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:05,991 INFO L470 AbstractCegarLoop]: Abstraction has 2434 states and 8534 transitions. [2021-08-06 15:38:05,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:05,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 8534 transitions. [2021-08-06 15:38:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:38:05,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:05,994 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:06,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 15:38:06,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:06,195 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:06,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:06,195 INFO L82 PathProgramCache]: Analyzing trace with hash 77503638, now seen corresponding path program 36 times [2021-08-06 15:38:06,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:06,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944935535] [2021-08-06 15:38:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:06,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:06,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:06,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944935535] [2021-08-06 15:38:06,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944935535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:06,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602047920] [2021-08-06 15:38:06,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:38:06,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:06,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:06,749 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:06,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 15:38:09,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:38:09,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:09,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:38:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:10,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:38:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:38:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:38:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:38:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:38:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:38:10,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:38:10,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 102 [2021-08-06 15:38:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:11,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602047920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:11,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:11,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-08-06 15:38:11,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859458535] [2021-08-06 15:38:11,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:38:11,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:38:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:38:11,318 INFO L87 Difference]: Start difference. First operand 2434 states and 8534 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 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) [2021-08-06 15:38:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:15,637 INFO L93 Difference]: Finished difference Result 4931 states and 16197 transitions. [2021-08-06 15:38:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-06 15:38:15,637 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 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 29 [2021-08-06 15:38:15,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:15,647 INFO L225 Difference]: With dead ends: 4931 [2021-08-06 15:38:15,648 INFO L226 Difference]: Without dead ends: 4871 [2021-08-06 15:38:15,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 3821.0ms TimeCoverageRelationStatistics Valid=1168, Invalid=4684, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 15:38:15,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-08-06 15:38:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 2509. [2021-08-06 15:38:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 2508 states have (on average 3.5191387559808613) internal successors, (8826), 2508 states have internal predecessors, (8826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:15,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 8826 transitions. [2021-08-06 15:38:15,702 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 8826 transitions. Word has length 29 [2021-08-06 15:38:15,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:15,702 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 8826 transitions. [2021-08-06 15:38:15,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 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) [2021-08-06 15:38:15,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 8826 transitions. [2021-08-06 15:38:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:38:15,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:15,705 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:15,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 15:38:15,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-06 15:38:15,906 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:15,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:15,906 INFO L82 PathProgramCache]: Analyzing trace with hash 92416966, now seen corresponding path program 37 times [2021-08-06 15:38:15,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:15,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954219604] [2021-08-06 15:38:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:15,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:16,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:16,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954219604] [2021-08-06 15:38:16,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954219604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:16,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378690615] [2021-08-06 15:38:16,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:38:16,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:16,479 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:16,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 15:38:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:19,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:38:19,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:20,109 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 15:38:20,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 98 treesize of output 63 [2021-08-06 15:38:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:20,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378690615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:20,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:20,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2021-08-06 15:38:20,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434594905] [2021-08-06 15:38:20,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:38:20,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:20,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:38:20,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:38:20,271 INFO L87 Difference]: Start difference. First operand 2509 states and 8826 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:22,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:22,590 INFO L93 Difference]: Finished difference Result 4390 states and 14638 transitions. [2021-08-06 15:38:22,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:38:22,590 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:38:22,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:22,598 INFO L225 Difference]: With dead ends: 4390 [2021-08-06 15:38:22,598 INFO L226 Difference]: Without dead ends: 4360 [2021-08-06 15:38:22,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 2142.2ms TimeCoverageRelationStatistics Valid=668, Invalid=2754, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 15:38:22,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4360 states. [2021-08-06 15:38:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4360 to 2546. [2021-08-06 15:38:22,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 2545 states have (on average 3.519842829076621) internal successors, (8958), 2545 states have internal predecessors, (8958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 8958 transitions. [2021-08-06 15:38:22,646 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 8958 transitions. Word has length 29 [2021-08-06 15:38:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:22,646 INFO L470 AbstractCegarLoop]: Abstraction has 2546 states and 8958 transitions. [2021-08-06 15:38:22,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:22,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 8958 transitions. [2021-08-06 15:38:22,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:38:22,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:22,650 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:22,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-06 15:38:22,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-06 15:38:22,850 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:22,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:22,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1245150248, now seen corresponding path program 38 times [2021-08-06 15:38:22,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:22,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924240584] [2021-08-06 15:38:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:22,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:23,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:23,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924240584] [2021-08-06 15:38:23,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924240584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:23,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762211203] [2021-08-06 15:38:23,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:38:23,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:23,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:23,381 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:23,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 15:38:26,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:38:26,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:26,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:38:26,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:27,169 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 15:38:27,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 94 treesize of output 63 [2021-08-06 15:38:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:27,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762211203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:27,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:27,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2021-08-06 15:38:27,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476694205] [2021-08-06 15:38:27,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:38:27,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:27,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:38:27,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:38:27,335 INFO L87 Difference]: Start difference. First operand 2546 states and 8958 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:30,193 INFO L93 Difference]: Finished difference Result 4565 states and 15063 transitions. [2021-08-06 15:38:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:38:30,194 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:38:30,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:30,203 INFO L225 Difference]: With dead ends: 4565 [2021-08-06 15:38:30,203 INFO L226 Difference]: Without dead ends: 4535 [2021-08-06 15:38:30,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2419.1ms TimeCoverageRelationStatistics Valid=718, Invalid=3314, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 15:38:30,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4535 states. [2021-08-06 15:38:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4535 to 2573. [2021-08-06 15:38:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 3.5139968895800933) internal successors, (9038), 2572 states have internal predecessors, (9038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 9038 transitions. [2021-08-06 15:38:30,255 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 9038 transitions. Word has length 29 [2021-08-06 15:38:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:30,255 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 9038 transitions. [2021-08-06 15:38:30,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:30,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 9038 transitions. [2021-08-06 15:38:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:38:30,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:30,259 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, 1, 1, 1, 1] [2021-08-06 15:38:30,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:30,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:30,460 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:30,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:30,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1392293266, now seen corresponding path program 23 times [2021-08-06 15:38:30,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:30,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79590189] [2021-08-06 15:38:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:30,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:31,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:31,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79590189] [2021-08-06 15:38:31,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79590189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:31,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512305541] [2021-08-06 15:38:31,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:38:31,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:31,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:31,212 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:31,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 15:38:34,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:38:34,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:38:34,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:35,164 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:38:35,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 92 treesize of output 80 [2021-08-06 15:38:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:35,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512305541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:35,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:35,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:38:35,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539833493] [2021-08-06 15:38:35,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:38:35,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:35,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:38:35,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:38:35,687 INFO L87 Difference]: Start difference. First operand 2573 states and 9038 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:39,091 INFO L93 Difference]: Finished difference Result 5125 states and 16964 transitions. [2021-08-06 15:38:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:38:39,091 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:38:39,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:39,102 INFO L225 Difference]: With dead ends: 5125 [2021-08-06 15:38:39,102 INFO L226 Difference]: Without dead ends: 5089 [2021-08-06 15:38:39,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 3066.4ms TimeCoverageRelationStatistics Valid=689, Invalid=3093, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:38:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5089 states. [2021-08-06 15:38:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5089 to 2625. [2021-08-06 15:38:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2625 states, 2624 states have (on average 3.5148628048780486) internal successors, (9223), 2624 states have internal predecessors, (9223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2625 states to 2625 states and 9223 transitions. [2021-08-06 15:38:39,161 INFO L78 Accepts]: Start accepts. Automaton has 2625 states and 9223 transitions. Word has length 29 [2021-08-06 15:38:39,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:39,162 INFO L470 AbstractCegarLoop]: Abstraction has 2625 states and 9223 transitions. [2021-08-06 15:38:39,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:39,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2625 states and 9223 transitions. [2021-08-06 15:38:39,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:38:39,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:39,166 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, 1, 1, 1, 1] [2021-08-06 15:38:39,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:39,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:39,381 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:39,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:39,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1088463298, now seen corresponding path program 24 times [2021-08-06 15:38:39,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:39,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352782739] [2021-08-06 15:38:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:39,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:39,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:39,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352782739] [2021-08-06 15:38:39,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352782739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:39,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127160855] [2021-08-06 15:38:39,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:38:39,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:39,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:39,793 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:39,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 15:38:42,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:38:42,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:42,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:38:42,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:44,053 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:38:44,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 74 [2021-08-06 15:38:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:44,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127160855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:44,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:44,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 15:38:44,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839582095] [2021-08-06 15:38:44,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:38:44,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:44,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:38:44,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:38:44,535 INFO L87 Difference]: Start difference. First operand 2625 states and 9223 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-08-06 15:38:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:46,985 INFO L93 Difference]: Finished difference Result 3645 states and 12400 transitions. [2021-08-06 15:38:46,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:38:46,986 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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 29 [2021-08-06 15:38:46,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:46,992 INFO L225 Difference]: With dead ends: 3645 [2021-08-06 15:38:46,992 INFO L226 Difference]: Without dead ends: 3615 [2021-08-06 15:38:46,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1846.1ms TimeCoverageRelationStatistics Valid=424, Invalid=2332, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:38:46,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2021-08-06 15:38:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 2626. [2021-08-06 15:38:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 3.5154285714285716) internal successors, (9228), 2625 states have internal predecessors, (9228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 9228 transitions. [2021-08-06 15:38:47,033 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 9228 transitions. Word has length 29 [2021-08-06 15:38:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:47,033 INFO L470 AbstractCegarLoop]: Abstraction has 2626 states and 9228 transitions. [2021-08-06 15:38:47,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2021-08-06 15:38:47,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 9228 transitions. [2021-08-06 15:38:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:38:47,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:47,037 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, 1, 1, 1, 1] [2021-08-06 15:38:47,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 15:38:47,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:47,238 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:47,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:47,238 INFO L82 PathProgramCache]: Analyzing trace with hash -957284526, now seen corresponding path program 25 times [2021-08-06 15:38:47,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:47,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755385641] [2021-08-06 15:38:47,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:47,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:47,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:47,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755385641] [2021-08-06 15:38:47,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755385641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:47,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641342654] [2021-08-06 15:38:47,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:38:47,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:47,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:47,678 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:47,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 15:38:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:50,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:38:50,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:51,587 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:38:51,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 92 treesize of output 80 [2021-08-06 15:38:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:52,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641342654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:52,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:52,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 15:38:52,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396174499] [2021-08-06 15:38:52,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:38:52,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:52,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:38:52,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:38:52,263 INFO L87 Difference]: Start difference. First operand 2626 states and 9228 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:38:53,479 INFO L93 Difference]: Finished difference Result 3984 states and 13670 transitions. [2021-08-06 15:38:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:38:53,479 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 29 [2021-08-06 15:38:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:38:53,488 INFO L225 Difference]: With dead ends: 3984 [2021-08-06 15:38:53,488 INFO L226 Difference]: Without dead ends: 3969 [2021-08-06 15:38:53,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1209.2ms TimeCoverageRelationStatistics Valid=343, Invalid=1297, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:38:53,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2021-08-06 15:38:53,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 2626. [2021-08-06 15:38:53,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 3.5154285714285716) internal successors, (9228), 2625 states have internal predecessors, (9228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 9228 transitions. [2021-08-06 15:38:53,537 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 9228 transitions. Word has length 29 [2021-08-06 15:38:53,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:38:53,537 INFO L470 AbstractCegarLoop]: Abstraction has 2626 states and 9228 transitions. [2021-08-06 15:38:53,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:38:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 9228 transitions. [2021-08-06 15:38:53,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:38:53,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:38:53,541 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:38:53,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 15:38:53,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 15:38:53,741 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:38:53,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:38:53,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1380566466, now seen corresponding path program 39 times [2021-08-06 15:38:53,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:38:53,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329080070] [2021-08-06 15:38:53,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:38:53,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:38:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:38:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:54,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:38:54,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329080070] [2021-08-06 15:38:54,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329080070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:54,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943973376] [2021-08-06 15:38:54,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:38:54,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:38:54,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:38:54,211 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:38:54,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 15:38:57,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:38:57,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:38:57,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:38:57,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:38:58,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:38:58,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:38:58,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:38:58,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:38:58,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:38:58,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:38:58,341 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:38:58,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 106 [2021-08-06 15:38:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:38:59,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943973376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:38:59,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:38:59,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-08-06 15:38:59,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902486126] [2021-08-06 15:38:59,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:38:59,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:38:59,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:38:59,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:38:59,035 INFO L87 Difference]: Start difference. First operand 2626 states and 9228 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 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) [2021-08-06 15:39:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:04,357 INFO L93 Difference]: Finished difference Result 5361 states and 17885 transitions. [2021-08-06 15:39:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 15:39:04,357 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 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 29 [2021-08-06 15:39:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:04,367 INFO L225 Difference]: With dead ends: 5361 [2021-08-06 15:39:04,367 INFO L226 Difference]: Without dead ends: 5315 [2021-08-06 15:39:04,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 4770.3ms TimeCoverageRelationStatistics Valid=1174, Invalid=5632, Unknown=0, NotChecked=0, Total=6806 [2021-08-06 15:39:04,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5315 states. [2021-08-06 15:39:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5315 to 2859. [2021-08-06 15:39:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2858 states have (on average 3.5150454863540936) internal successors, (10046), 2858 states have internal predecessors, (10046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 10046 transitions. [2021-08-06 15:39:04,448 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 10046 transitions. Word has length 29 [2021-08-06 15:39:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:04,448 INFO L470 AbstractCegarLoop]: Abstraction has 2859 states and 10046 transitions. [2021-08-06 15:39:04,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 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) [2021-08-06 15:39:04,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 10046 transitions. [2021-08-06 15:39:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:39:04,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:04,452 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:04,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 15:39:04,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-06 15:39:04,653 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:04,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash -990358138, now seen corresponding path program 40 times [2021-08-06 15:39:04,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:04,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569355639] [2021-08-06 15:39:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:04,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:05,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:05,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569355639] [2021-08-06 15:39:05,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569355639] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:05,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730616277] [2021-08-06 15:39:05,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:39:05,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:05,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:05,201 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:05,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 15:39:08,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:39:08,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:08,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:39:08,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:09,217 INFO L354 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2021-08-06 15:39:09,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 102 treesize of output 106 [2021-08-06 15:39:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:10,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730616277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:10,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:10,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-08-06 15:39:10,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702232674] [2021-08-06 15:39:10,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:39:10,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:10,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:39:10,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:39:10,578 INFO L87 Difference]: Start difference. First operand 2859 states and 10046 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-08-06 15:39:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:13,623 INFO L93 Difference]: Finished difference Result 5633 states and 18914 transitions. [2021-08-06 15:39:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-06 15:39:13,623 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 29 [2021-08-06 15:39:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:13,634 INFO L225 Difference]: With dead ends: 5633 [2021-08-06 15:39:13,634 INFO L226 Difference]: Without dead ends: 5582 [2021-08-06 15:39:13,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 2898.6ms TimeCoverageRelationStatistics Valid=818, Invalid=3472, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 15:39:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5582 states. [2021-08-06 15:39:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5582 to 3138. [2021-08-06 15:39:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3137 states have (on average 3.5215173732865797) internal successors, (11047), 3137 states have internal predecessors, (11047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 11047 transitions. [2021-08-06 15:39:13,698 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 11047 transitions. Word has length 29 [2021-08-06 15:39:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:13,698 INFO L470 AbstractCegarLoop]: Abstraction has 3138 states and 11047 transitions. [2021-08-06 15:39:13,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-08-06 15:39:13,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 11047 transitions. [2021-08-06 15:39:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:39:13,703 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:13,703 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:13,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 15:39:13,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 15:39:13,904 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:13,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:13,904 INFO L82 PathProgramCache]: Analyzing trace with hash -155735108, now seen corresponding path program 41 times [2021-08-06 15:39:13,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:13,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943448803] [2021-08-06 15:39:13,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:13,904 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:14,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:14,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943448803] [2021-08-06 15:39:14,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943448803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:14,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023687193] [2021-08-06 15:39:14,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:39:14,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:14,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:14,477 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:14,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 15:39:17,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:39:17,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:17,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:39:17,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:18,705 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 15:39:18,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 101 treesize of output 70 [2021-08-06 15:39:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:18,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023687193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:18,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:18,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-08-06 15:39:18,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755046528] [2021-08-06 15:39:18,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-06 15:39:18,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-06 15:39:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:39:18,984 INFO L87 Difference]: Start difference. First operand 3138 states and 11047 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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) [2021-08-06 15:39:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:21,316 INFO L93 Difference]: Finished difference Result 5352 states and 18009 transitions. [2021-08-06 15:39:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:39:21,317 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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 29 [2021-08-06 15:39:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:21,327 INFO L225 Difference]: With dead ends: 5352 [2021-08-06 15:39:21,328 INFO L226 Difference]: Without dead ends: 5296 [2021-08-06 15:39:21,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 2337.2ms TimeCoverageRelationStatistics Valid=649, Invalid=3133, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:39:21,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5296 states. [2021-08-06 15:39:21,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5296 to 3134. [2021-08-06 15:39:21,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3134 states, 3133 states have (on average 3.5205872965209064) internal successors, (11030), 3133 states have internal predecessors, (11030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3134 states to 3134 states and 11030 transitions. [2021-08-06 15:39:21,392 INFO L78 Accepts]: Start accepts. Automaton has 3134 states and 11030 transitions. Word has length 29 [2021-08-06 15:39:21,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:21,392 INFO L470 AbstractCegarLoop]: Abstraction has 3134 states and 11030 transitions. [2021-08-06 15:39:21,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 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) [2021-08-06 15:39:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3134 states and 11030 transitions. [2021-08-06 15:39:21,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:39:21,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:21,397 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, 1, 1, 1, 1] [2021-08-06 15:39:21,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 15:39:21,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 15:39:21,597 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash 888723334, now seen corresponding path program 26 times [2021-08-06 15:39:21,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:21,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858863784] [2021-08-06 15:39:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:21,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:22,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:22,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858863784] [2021-08-06 15:39:22,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858863784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:22,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127627755] [2021-08-06 15:39:22,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:39:22,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:22,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:22,239 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:22,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 15:39:25,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:39:25,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:25,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:39:25,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:26,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:39:26,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:39:26,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:39:26,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:39:26,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:39:26,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-08-06 15:39:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:27,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127627755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:27,036 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:27,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-08-06 15:39:27,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994268918] [2021-08-06 15:39:27,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:39:27,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:27,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:39:27,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:39:27,037 INFO L87 Difference]: Start difference. First operand 3134 states and 11030 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-08-06 15:39:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:32,245 INFO L93 Difference]: Finished difference Result 5619 states and 18845 transitions. [2021-08-06 15:39:32,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-06 15:39:32,246 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 29 [2021-08-06 15:39:32,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:32,257 INFO L225 Difference]: With dead ends: 5619 [2021-08-06 15:39:32,257 INFO L226 Difference]: Without dead ends: 5574 [2021-08-06 15:39:32,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2133 ImplicationChecksByTransitivity, 4426.8ms TimeCoverageRelationStatistics Valid=692, Invalid=5470, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 15:39:32,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2021-08-06 15:39:32,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 3147. [2021-08-06 15:39:32,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3147 states, 3146 states have (on average 3.5190718372536556) internal successors, (11071), 3146 states have internal predecessors, (11071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:32,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3147 states to 3147 states and 11071 transitions. [2021-08-06 15:39:32,321 INFO L78 Accepts]: Start accepts. Automaton has 3147 states and 11071 transitions. Word has length 29 [2021-08-06 15:39:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:32,322 INFO L470 AbstractCegarLoop]: Abstraction has 3147 states and 11071 transitions. [2021-08-06 15:39:32,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-08-06 15:39:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3147 states and 11071 transitions. [2021-08-06 15:39:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:39:32,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:32,326 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, 1, 1, 1, 1] [2021-08-06 15:39:32,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 15:39:32,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:32,529 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash -260349058, now seen corresponding path program 27 times [2021-08-06 15:39:32,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:32,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633600391] [2021-08-06 15:39:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:32,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:33,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:33,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633600391] [2021-08-06 15:39:33,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633600391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:33,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828700919] [2021-08-06 15:39:33,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:39:33,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:33,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:33,143 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:33,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 15:39:36,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:39:36,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:36,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:39:36,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:39:37,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:39:37,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:39:37,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:39:37,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:39:37,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 70 [2021-08-06 15:39:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:38,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828700919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:38,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:38,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-08-06 15:39:38,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055693112] [2021-08-06 15:39:38,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:39:38,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:38,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:39:38,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:39:38,247 INFO L87 Difference]: Start difference. First operand 3147 states and 11071 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-08-06 15:39:44,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:44,612 INFO L93 Difference]: Finished difference Result 6110 states and 20501 transitions. [2021-08-06 15:39:44,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-06 15:39:44,612 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 29 [2021-08-06 15:39:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:44,624 INFO L225 Difference]: With dead ends: 6110 [2021-08-06 15:39:44,624 INFO L226 Difference]: Without dead ends: 6065 [2021-08-06 15:39:44,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2793 ImplicationChecksByTransitivity, 5539.9ms TimeCoverageRelationStatistics Valid=937, Invalid=6895, Unknown=0, NotChecked=0, Total=7832 [2021-08-06 15:39:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6065 states. [2021-08-06 15:39:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6065 to 3145. [2021-08-06 15:39:44,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 3144 states have (on average 3.520038167938931) internal successors, (11067), 3144 states have internal predecessors, (11067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 11067 transitions. [2021-08-06 15:39:44,691 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 11067 transitions. Word has length 29 [2021-08-06 15:39:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:44,691 INFO L470 AbstractCegarLoop]: Abstraction has 3145 states and 11067 transitions. [2021-08-06 15:39:44,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2021-08-06 15:39:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 11067 transitions. [2021-08-06 15:39:44,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:39:44,696 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:44,696 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, 1, 1, 1, 1] [2021-08-06 15:39:44,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 15:39:44,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-08-06 15:39:44,897 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:44,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:44,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1927834118, now seen corresponding path program 28 times [2021-08-06 15:39:44,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:44,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121012284] [2021-08-06 15:39:44,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:44,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:45,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:45,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121012284] [2021-08-06 15:39:45,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121012284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:45,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80374370] [2021-08-06 15:39:45,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:39:45,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:45,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:45,363 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:45,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 15:39:48,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:39:48,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:48,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:39:48,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:49,940 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:39:49,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 99 treesize of output 87 [2021-08-06 15:39:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:50,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80374370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:50,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:50,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-06 15:39:50,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574753466] [2021-08-06 15:39:50,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:39:50,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:50,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:39:50,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:39:50,405 INFO L87 Difference]: Start difference. First operand 3145 states and 11067 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:51,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:51,653 INFO L93 Difference]: Finished difference Result 5244 states and 17826 transitions. [2021-08-06 15:39:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:39:51,654 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 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 29 [2021-08-06 15:39:51,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:51,664 INFO L225 Difference]: With dead ends: 5244 [2021-08-06 15:39:51,664 INFO L226 Difference]: Without dead ends: 5223 [2021-08-06 15:39:51,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1271.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:39:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-08-06 15:39:51,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 3160. [2021-08-06 15:39:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 3159 states have (on average 3.518201962646407) internal successors, (11114), 3159 states have internal predecessors, (11114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 11114 transitions. [2021-08-06 15:39:51,731 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 11114 transitions. Word has length 29 [2021-08-06 15:39:51,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:51,731 INFO L470 AbstractCegarLoop]: Abstraction has 3160 states and 11114 transitions. [2021-08-06 15:39:51,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:51,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 11114 transitions. [2021-08-06 15:39:51,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:39:51,736 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:51,736 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, 1, 1, 1, 1] [2021-08-06 15:39:51,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 15:39:51,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:51,936 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:51,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:51,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1090806206, now seen corresponding path program 29 times [2021-08-06 15:39:51,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:51,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920613533] [2021-08-06 15:39:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:51,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:39:52,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:52,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:39:52,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920613533] [2021-08-06 15:39:52,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920613533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:52,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937136190] [2021-08-06 15:39:52,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:39:52,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:52,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:39:52,572 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:39:52,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 15:39:56,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:39:56,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:39:56,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:39:56,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:39:57,127 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:39:57,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 97 treesize of output 85 [2021-08-06 15:39:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:39:57,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937136190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:39:57,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:39:57,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-08-06 15:39:57,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986059681] [2021-08-06 15:39:57,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:39:57,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:39:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:39:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:39:57,970 INFO L87 Difference]: Start difference. First operand 3160 states and 11114 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:39:59,316 INFO L93 Difference]: Finished difference Result 4404 states and 15172 transitions. [2021-08-06 15:39:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:39:59,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 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 29 [2021-08-06 15:39:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:39:59,324 INFO L225 Difference]: With dead ends: 4404 [2021-08-06 15:39:59,324 INFO L226 Difference]: Without dead ends: 4379 [2021-08-06 15:39:59,325 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1194.9ms TimeCoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:39:59,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4379 states. [2021-08-06 15:39:59,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4379 to 3170. [2021-08-06 15:39:59,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3169 states have (on average 3.5200378668349637) internal successors, (11155), 3169 states have internal predecessors, (11155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:59,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 11155 transitions. [2021-08-06 15:39:59,379 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 11155 transitions. Word has length 29 [2021-08-06 15:39:59,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:39:59,379 INFO L470 AbstractCegarLoop]: Abstraction has 3170 states and 11155 transitions. [2021-08-06 15:39:59,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:39:59,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 11155 transitions. [2021-08-06 15:39:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:39:59,384 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:39:59,384 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:39:59,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 15:39:59,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:39:59,585 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:39:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:39:59,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1357561282, now seen corresponding path program 42 times [2021-08-06 15:39:59,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:39:59,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121033364] [2021-08-06 15:39:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:39:59,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:39:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:00,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:00,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121033364] [2021-08-06 15:40:00,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121033364] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:00,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297254767] [2021-08-06 15:40:00,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:40:00,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:00,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:00,209 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:00,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 15:40:03,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:40:03,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:03,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:40:03,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:40:04,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:40:04,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:40:04,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:40:04,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:40:04,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:40:04,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:40:04,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 102 [2021-08-06 15:40:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:06,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297254767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:06,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:06,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-08-06 15:40:06,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990957045] [2021-08-06 15:40:06,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:40:06,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:06,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:40:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:40:06,481 INFO L87 Difference]: Start difference. First operand 3170 states and 11155 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-08-06 15:40:10,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:10,545 INFO L93 Difference]: Finished difference Result 6693 states and 22285 transitions. [2021-08-06 15:40:10,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 15:40:10,545 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 29 [2021-08-06 15:40:10,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:10,559 INFO L225 Difference]: With dead ends: 6693 [2021-08-06 15:40:10,559 INFO L226 Difference]: Without dead ends: 6620 [2021-08-06 15:40:10,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 3716.5ms TimeCoverageRelationStatistics Valid=950, Invalid=4020, Unknown=0, NotChecked=0, Total=4970 [2021-08-06 15:40:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6620 states. [2021-08-06 15:40:10,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6620 to 3394. [2021-08-06 15:40:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3394 states, 3393 states have (on average 3.5319776009431183) internal successors, (11984), 3393 states have internal predecessors, (11984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:10,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3394 states to 3394 states and 11984 transitions. [2021-08-06 15:40:10,635 INFO L78 Accepts]: Start accepts. Automaton has 3394 states and 11984 transitions. Word has length 29 [2021-08-06 15:40:10,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:10,635 INFO L470 AbstractCegarLoop]: Abstraction has 3394 states and 11984 transitions. [2021-08-06 15:40:10,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-08-06 15:40:10,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3394 states and 11984 transitions. [2021-08-06 15:40:10,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:40:10,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:10,640 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:10,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 15:40:10,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:10,841 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:10,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:10,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1933432138, now seen corresponding path program 43 times [2021-08-06 15:40:10,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:10,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144407797] [2021-08-06 15:40:10,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:10,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:11,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:11,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144407797] [2021-08-06 15:40:11,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144407797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:11,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707411835] [2021-08-06 15:40:11,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:40:11,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:11,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:11,369 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:11,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 15:40:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:15,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:40:15,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:16,215 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 15:40:16,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 98 treesize of output 63 [2021-08-06 15:40:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:16,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707411835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:16,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:16,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-08-06 15:40:16,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594227407] [2021-08-06 15:40:16,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:40:16,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:16,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:40:16,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:40:16,394 INFO L87 Difference]: Start difference. First operand 3394 states and 11984 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-08-06 15:40:18,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:18,755 INFO L93 Difference]: Finished difference Result 6248 states and 21053 transitions. [2021-08-06 15:40:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:40:18,756 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 29 [2021-08-06 15:40:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:18,768 INFO L225 Difference]: With dead ends: 6248 [2021-08-06 15:40:18,768 INFO L226 Difference]: Without dead ends: 6212 [2021-08-06 15:40:18,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 2180.2ms TimeCoverageRelationStatistics Valid=692, Invalid=3090, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 15:40:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2021-08-06 15:40:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 3529. [2021-08-06 15:40:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3528 states have (on average 3.5308956916099774) internal successors, (12457), 3528 states have internal predecessors, (12457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 12457 transitions. [2021-08-06 15:40:18,836 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 12457 transitions. Word has length 29 [2021-08-06 15:40:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:18,836 INFO L470 AbstractCegarLoop]: Abstraction has 3529 states and 12457 transitions. [2021-08-06 15:40:18,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-08-06 15:40:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 12457 transitions. [2021-08-06 15:40:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:40:18,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:18,841 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:18,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 15:40:19,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-08-06 15:40:19,042 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:19,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:19,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1023967944, now seen corresponding path program 44 times [2021-08-06 15:40:19,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:19,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719335877] [2021-08-06 15:40:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:19,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:19,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:19,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719335877] [2021-08-06 15:40:19,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719335877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:19,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290778634] [2021-08-06 15:40:19,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:40:19,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:19,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:19,531 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:19,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 15:40:23,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:40:23,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:23,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:40:23,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:24,513 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 15:40:24,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 98 treesize of output 67 [2021-08-06 15:40:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:24,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290778634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:24,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:24,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2021-08-06 15:40:24,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968910322] [2021-08-06 15:40:24,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:40:24,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:24,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:40:24,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:40:24,695 INFO L87 Difference]: Start difference. First operand 3529 states and 12457 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-08-06 15:40:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:27,779 INFO L93 Difference]: Finished difference Result 6432 states and 21352 transitions. [2021-08-06 15:40:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:40:27,779 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 29 [2021-08-06 15:40:27,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:27,793 INFO L225 Difference]: With dead ends: 6432 [2021-08-06 15:40:27,794 INFO L226 Difference]: Without dead ends: 6381 [2021-08-06 15:40:27,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1416 ImplicationChecksByTransitivity, 2668.2ms TimeCoverageRelationStatistics Valid=779, Invalid=3777, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 15:40:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6381 states. [2021-08-06 15:40:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6381 to 3516. [2021-08-06 15:40:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3516 states, 3515 states have (on average 3.52574679943101) internal successors, (12393), 3515 states have internal predecessors, (12393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3516 states to 3516 states and 12393 transitions. [2021-08-06 15:40:27,867 INFO L78 Accepts]: Start accepts. Automaton has 3516 states and 12393 transitions. Word has length 29 [2021-08-06 15:40:27,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:27,867 INFO L470 AbstractCegarLoop]: Abstraction has 3516 states and 12393 transitions. [2021-08-06 15:40:27,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-08-06 15:40:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3516 states and 12393 transitions. [2021-08-06 15:40:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:40:27,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:27,872 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:27,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 15:40:28,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:28,073 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:28,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:28,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1052645210, now seen corresponding path program 45 times [2021-08-06 15:40:28,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:28,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990322957] [2021-08-06 15:40:28,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:28,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:28,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:28,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990322957] [2021-08-06 15:40:28,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990322957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:28,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951923662] [2021-08-06 15:40:28,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:40:28,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:28,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:28,570 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:28,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 15:40:32,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:40:32,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:32,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:40:32,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:33,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:40:33,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:40:33,599 INFO L354 Elim1Store]: treesize reduction 22, result has 85.2 percent of original size [2021-08-06 15:40:33,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 102 treesize of output 188 [2021-08-06 15:40:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:45,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951923662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:45,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:45,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-08-06 15:40:45,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170812554] [2021-08-06 15:40:45,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-06 15:40:45,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:45,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-06 15:40:45,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:40:45,598 INFO L87 Difference]: Start difference. First operand 3516 states and 12393 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 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) [2021-08-06 15:40:51,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:40:51,884 INFO L93 Difference]: Finished difference Result 6929 states and 23105 transitions. [2021-08-06 15:40:51,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-06 15:40:51,885 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 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 29 [2021-08-06 15:40:51,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:40:51,900 INFO L225 Difference]: With dead ends: 6929 [2021-08-06 15:40:51,900 INFO L226 Difference]: Without dead ends: 6876 [2021-08-06 15:40:51,900 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2370 ImplicationChecksByTransitivity, 5702.4ms TimeCoverageRelationStatistics Valid=1183, Invalid=5957, Unknown=0, NotChecked=0, Total=7140 [2021-08-06 15:40:51,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2021-08-06 15:40:51,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 3517. [2021-08-06 15:40:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3517 states, 3516 states have (on average 3.525597269624573) internal successors, (12396), 3516 states have internal predecessors, (12396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:40:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3517 states to 3517 states and 12396 transitions. [2021-08-06 15:40:51,980 INFO L78 Accepts]: Start accepts. Automaton has 3517 states and 12396 transitions. Word has length 29 [2021-08-06 15:40:51,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:40:51,980 INFO L470 AbstractCegarLoop]: Abstraction has 3517 states and 12396 transitions. [2021-08-06 15:40:51,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 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) [2021-08-06 15:40:51,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3517 states and 12396 transitions. [2021-08-06 15:40:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:40:51,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:40:51,985 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:40:52,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-06 15:40:52,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:52,201 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:40:52,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:40:52,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1138570374, now seen corresponding path program 46 times [2021-08-06 15:40:52,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:40:52,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604827686] [2021-08-06 15:40:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:40:52,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:40:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:40:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:52,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:40:52,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604827686] [2021-08-06 15:40:52,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604827686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:52,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088354651] [2021-08-06 15:40:52,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:40:52,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:40:52,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:40:52,996 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:40:52,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 15:40:57,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:40:57,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:40:57,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:40:57,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:40:57,850 INFO L354 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2021-08-06 15:40:57,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 102 treesize of output 106 [2021-08-06 15:40:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:40:59,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088354651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:40:59,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:40:59,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-06 15:40:59,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745219765] [2021-08-06 15:40:59,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:40:59,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:40:59,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:40:59,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:40:59,110 INFO L87 Difference]: Start difference. First operand 3517 states and 12396 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-08-06 15:41:03,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:03,858 INFO L93 Difference]: Finished difference Result 6026 states and 20564 transitions. [2021-08-06 15:41:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 15:41:03,858 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 29 [2021-08-06 15:41:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:03,870 INFO L225 Difference]: With dead ends: 6026 [2021-08-06 15:41:03,870 INFO L226 Difference]: Without dead ends: 5996 [2021-08-06 15:41:03,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 4195.1ms TimeCoverageRelationStatistics Valid=931, Invalid=4619, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 15:41:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2021-08-06 15:41:03,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 3554. [2021-08-06 15:41:03,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 3553 states have (on average 3.530819026175063) internal successors, (12545), 3553 states have internal predecessors, (12545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 12545 transitions. [2021-08-06 15:41:03,935 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 12545 transitions. Word has length 29 [2021-08-06 15:41:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:03,935 INFO L470 AbstractCegarLoop]: Abstraction has 3554 states and 12545 transitions. [2021-08-06 15:41:03,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-08-06 15:41:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 12545 transitions. [2021-08-06 15:41:03,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:41:03,940 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:03,940 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:03,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 15:41:04,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 15:41:04,142 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:04,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:04,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1973193404, now seen corresponding path program 47 times [2021-08-06 15:41:04,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:04,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664776233] [2021-08-06 15:41:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:04,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:04,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:04,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664776233] [2021-08-06 15:41:04,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664776233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:04,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260733637] [2021-08-06 15:41:04,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:41:04,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:04,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:04,918 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:04,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 15:41:09,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:41:09,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:09,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:41:09,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:09,938 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 15:41:09,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 98 treesize of output 67 [2021-08-06 15:41:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:10,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260733637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:10,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:10,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-06 15:41:10,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379995817] [2021-08-06 15:41:10,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:41:10,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:10,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:41:10,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:41:10,172 INFO L87 Difference]: Start difference. First operand 3554 states and 12545 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-08-06 15:41:15,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:15,561 INFO L93 Difference]: Finished difference Result 6093 states and 20666 transitions. [2021-08-06 15:41:15,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 15:41:15,561 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 29 [2021-08-06 15:41:15,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:15,573 INFO L225 Difference]: With dead ends: 6093 [2021-08-06 15:41:15,574 INFO L226 Difference]: Without dead ends: 6063 [2021-08-06 15:41:15,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2295 ImplicationChecksByTransitivity, 5066.9ms TimeCoverageRelationStatistics Valid=1175, Invalid=5797, Unknown=0, NotChecked=0, Total=6972 [2021-08-06 15:41:15,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-08-06 15:41:15,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 3560. [2021-08-06 15:41:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3560 states, 3559 states have (on average 3.531890980612532) internal successors, (12570), 3559 states have internal predecessors, (12570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3560 states to 3560 states and 12570 transitions. [2021-08-06 15:41:15,654 INFO L78 Accepts]: Start accepts. Automaton has 3560 states and 12570 transitions. Word has length 29 [2021-08-06 15:41:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:15,654 INFO L470 AbstractCegarLoop]: Abstraction has 3560 states and 12570 transitions. [2021-08-06 15:41:15,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-08-06 15:41:15,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3560 states and 12570 transitions. [2021-08-06 15:41:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:41:15,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:15,660 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, 1, 1, 1, 1] [2021-08-06 15:41:15,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 15:41:15,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 15:41:15,885 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:15,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:15,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1237154230, now seen corresponding path program 30 times [2021-08-06 15:41:15,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:15,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098701141] [2021-08-06 15:41:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:15,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:16,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:16,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098701141] [2021-08-06 15:41:16,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098701141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:16,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127728502] [2021-08-06 15:41:16,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:41:16,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:16,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:16,710 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:16,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 15:41:20,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:41:20,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:20,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:41:20,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:21,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:41:21,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:41:21,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 15:41:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:41:21,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:41:21,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:41:21,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:41:21,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 70 [2021-08-06 15:41:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:22,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127728502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:22,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:22,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-06 15:41:22,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794009198] [2021-08-06 15:41:22,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:41:22,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:22,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:41:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:41:22,477 INFO L87 Difference]: Start difference. First operand 3560 states and 12570 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-08-06 15:41:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:25,574 INFO L93 Difference]: Finished difference Result 5456 states and 18632 transitions. [2021-08-06 15:41:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:41:25,575 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 29 [2021-08-06 15:41:25,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:25,585 INFO L225 Difference]: With dead ends: 5456 [2021-08-06 15:41:25,586 INFO L226 Difference]: Without dead ends: 5441 [2021-08-06 15:41:25,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 2693.7ms TimeCoverageRelationStatistics Valid=327, Invalid=1929, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:41:25,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5441 states. [2021-08-06 15:41:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5441 to 3575. [2021-08-06 15:41:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3575 states, 3574 states have (on average 3.5338556239507555) internal successors, (12630), 3574 states have internal predecessors, (12630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3575 states to 3575 states and 12630 transitions. [2021-08-06 15:41:25,661 INFO L78 Accepts]: Start accepts. Automaton has 3575 states and 12630 transitions. Word has length 29 [2021-08-06 15:41:25,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:25,661 INFO L470 AbstractCegarLoop]: Abstraction has 3575 states and 12630 transitions. [2021-08-06 15:41:25,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-08-06 15:41:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 3575 states and 12630 transitions. [2021-08-06 15:41:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:41:25,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:25,666 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:25,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 15:41:25,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 15:41:25,867 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:25,867 INFO L82 PathProgramCache]: Analyzing trace with hash 635626190, now seen corresponding path program 48 times [2021-08-06 15:41:25,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:25,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111488432] [2021-08-06 15:41:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:25,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:26,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:26,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111488432] [2021-08-06 15:41:26,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111488432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:26,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643032851] [2021-08-06 15:41:26,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:41:26,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:26,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:26,662 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:26,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 15:41:30,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:41:30,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:41:30,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:41:30,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:31,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:41:31,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:41:31,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:41:31,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:41:32,021 INFO L354 Elim1Store]: treesize reduction 48, result has 62.8 percent of original size [2021-08-06 15:41:32,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 88 treesize of output 128 [2021-08-06 15:41:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:38,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643032851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:38,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:38,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-08-06 15:41:38,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429503893] [2021-08-06 15:41:38,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-06 15:41:38,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:38,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-06 15:41:38,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:41:38,399 INFO L87 Difference]: Start difference. First operand 3575 states and 12630 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-08-06 15:41:48,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:41:48,566 INFO L93 Difference]: Finished difference Result 6764 states and 22605 transitions. [2021-08-06 15:41:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-06 15:41:48,567 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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 29 [2021-08-06 15:41:48,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:41:48,579 INFO L225 Difference]: With dead ends: 6764 [2021-08-06 15:41:48,579 INFO L226 Difference]: Without dead ends: 6749 [2021-08-06 15:41:48,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3477 ImplicationChecksByTransitivity, 9238.5ms TimeCoverageRelationStatistics Valid=1508, Invalid=9204, Unknown=0, NotChecked=0, Total=10712 [2021-08-06 15:41:48,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6749 states. [2021-08-06 15:41:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6749 to 3578. [2021-08-06 15:41:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 3.5348057031031592) internal successors, (12644), 3577 states have internal predecessors, (12644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:41:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 12644 transitions. [2021-08-06 15:41:48,646 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 12644 transitions. Word has length 29 [2021-08-06 15:41:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:41:48,646 INFO L470 AbstractCegarLoop]: Abstraction has 3578 states and 12644 transitions. [2021-08-06 15:41:48,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 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) [2021-08-06 15:41:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 12644 transitions. [2021-08-06 15:41:48,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:41:48,651 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:41:48,651 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:41:48,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-06 15:41:48,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:48,852 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:41:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:41:48,852 INFO L82 PathProgramCache]: Analyzing trace with hash 183686030, now seen corresponding path program 49 times [2021-08-06 15:41:48,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:41:48,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961105278] [2021-08-06 15:41:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:41:48,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:41:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:49,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:41:49,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961105278] [2021-08-06 15:41:49,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961105278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:49,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712461245] [2021-08-06 15:41:49,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:41:49,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:41:49,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:41:49,507 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:41:49,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 15:41:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:41:53,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:41:53,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:41:54,724 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 15:41:54,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 98 treesize of output 63 [2021-08-06 15:41:54,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:41:54,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712461245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:41:54,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:41:54,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-06 15:41:54,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792465170] [2021-08-06 15:41:54,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:41:54,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:41:54,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:41:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:41:54,955 INFO L87 Difference]: Start difference. First operand 3578 states and 12644 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-08-06 15:42:02,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:02,210 INFO L93 Difference]: Finished difference Result 6663 states and 22228 transitions. [2021-08-06 15:42:02,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-06 15:42:02,211 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 29 [2021-08-06 15:42:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:02,224 INFO L225 Difference]: With dead ends: 6663 [2021-08-06 15:42:02,224 INFO L226 Difference]: Without dead ends: 6633 [2021-08-06 15:42:02,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3226 ImplicationChecksByTransitivity, 6311.8ms TimeCoverageRelationStatistics Valid=1481, Invalid=8025, Unknown=0, NotChecked=0, Total=9506 [2021-08-06 15:42:02,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6633 states. [2021-08-06 15:42:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6633 to 3590. [2021-08-06 15:42:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3590 states, 3589 states have (on average 3.53691836166063) internal successors, (12694), 3589 states have internal predecessors, (12694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:02,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 12694 transitions. [2021-08-06 15:42:02,294 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 12694 transitions. Word has length 29 [2021-08-06 15:42:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:02,294 INFO L470 AbstractCegarLoop]: Abstraction has 3590 states and 12694 transitions. [2021-08-06 15:42:02,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-08-06 15:42:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 12694 transitions. [2021-08-06 15:42:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:42:02,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:02,299 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:02,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 15:42:02,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-06 15:42:02,500 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:02,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1749940544, now seen corresponding path program 50 times [2021-08-06 15:42:02,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:02,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984103960] [2021-08-06 15:42:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:02,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:03,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:03,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984103960] [2021-08-06 15:42:03,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984103960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:03,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094000339] [2021-08-06 15:42:03,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:42:03,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:03,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:03,286 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:42:03,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 15:42:07,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:42:07,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:07,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:42:07,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:08,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:42:08,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:42:08,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:42:08,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:42:08,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:42:08,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:42:08,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:42:08,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 102 [2021-08-06 15:42:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:10,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094000339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:10,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:10,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-08-06 15:42:10,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213119488] [2021-08-06 15:42:10,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-06 15:42:10,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:10,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-06 15:42:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:42:10,426 INFO L87 Difference]: Start difference. First operand 3590 states and 12694 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-08-06 15:42:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:19,479 INFO L93 Difference]: Finished difference Result 6365 states and 21329 transitions. [2021-08-06 15:42:19,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-06 15:42:19,479 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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 29 [2021-08-06 15:42:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:19,490 INFO L225 Difference]: With dead ends: 6365 [2021-08-06 15:42:19,491 INFO L226 Difference]: Without dead ends: 6350 [2021-08-06 15:42:19,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 8081.6ms TimeCoverageRelationStatistics Valid=1541, Invalid=8559, Unknown=0, NotChecked=0, Total=10100 [2021-08-06 15:42:19,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6350 states. [2021-08-06 15:42:19,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6350 to 3593. [2021-08-06 15:42:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3592 states have (on average 3.5370267260579062) internal successors, (12705), 3592 states have internal predecessors, (12705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:19,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 12705 transitions. [2021-08-06 15:42:19,562 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 12705 transitions. Word has length 29 [2021-08-06 15:42:19,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:19,562 INFO L470 AbstractCegarLoop]: Abstraction has 3593 states and 12705 transitions. [2021-08-06 15:42:19,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-08-06 15:42:19,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 12705 transitions. [2021-08-06 15:42:19,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:42:19,568 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:19,568 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:42:19,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-06 15:42:19,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-06 15:42:19,768 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:19,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:19,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1580589698, now seen corresponding path program 51 times [2021-08-06 15:42:19,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:19,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310296184] [2021-08-06 15:42:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:19,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:20,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:20,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310296184] [2021-08-06 15:42:20,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310296184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:20,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979190224] [2021-08-06 15:42:20,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:42:20,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:20,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:20,613 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:42:20,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 15:42:25,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:42:25,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:25,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:42:25,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:26,201 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 15:42:26,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 98 treesize of output 63 [2021-08-06 15:42:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:26,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979190224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:26,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:26,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-08-06 15:42:26,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612324752] [2021-08-06 15:42:26,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-06 15:42:26,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:26,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-06 15:42:26,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:42:26,363 INFO L87 Difference]: Start difference. First operand 3593 states and 12705 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-08-06 15:42:32,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:32,487 INFO L93 Difference]: Finished difference Result 5956 states and 20109 transitions. [2021-08-06 15:42:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 15:42:32,487 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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 29 [2021-08-06 15:42:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:32,499 INFO L225 Difference]: With dead ends: 5956 [2021-08-06 15:42:32,500 INFO L226 Difference]: Without dead ends: 5926 [2021-08-06 15:42:32,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1947 ImplicationChecksByTransitivity, 5539.5ms TimeCoverageRelationStatistics Valid=878, Invalid=5602, Unknown=0, NotChecked=0, Total=6480 [2021-08-06 15:42:32,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2021-08-06 15:42:32,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 3603. [2021-08-06 15:42:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 3602 states have (on average 3.5363686840644086) internal successors, (12738), 3602 states have internal predecessors, (12738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:32,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 12738 transitions. [2021-08-06 15:42:32,567 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 12738 transitions. Word has length 29 [2021-08-06 15:42:32,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:32,567 INFO L470 AbstractCegarLoop]: Abstraction has 3603 states and 12738 transitions. [2021-08-06 15:42:32,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 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) [2021-08-06 15:42:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 12738 transitions. [2021-08-06 15:42:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:42:32,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:32,573 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, 1, 1, 1, 1] [2021-08-06 15:42:32,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2021-08-06 15:42:32,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-08-06 15:42:32,773 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:32,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:32,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1907380594, now seen corresponding path program 31 times [2021-08-06 15:42:32,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:32,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792040190] [2021-08-06 15:42:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:32,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:33,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:33,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792040190] [2021-08-06 15:42:33,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792040190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:33,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646114579] [2021-08-06 15:42:33,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:42:33,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:33,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:33,375 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:42:33,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 15:42:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:38,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:42:38,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:39,158 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 15:42:39,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 90 treesize of output 60 [2021-08-06 15:42:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:39,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646114579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:39,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:39,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:42:39,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458398485] [2021-08-06 15:42:39,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:42:39,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:39,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:42:39,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:42:39,347 INFO L87 Difference]: Start difference. First operand 3603 states and 12738 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:40,195 INFO L93 Difference]: Finished difference Result 3821 states and 13314 transitions. [2021-08-06 15:42:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:42:40,195 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:42:40,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:40,202 INFO L225 Difference]: With dead ends: 3821 [2021-08-06 15:42:40,202 INFO L226 Difference]: Without dead ends: 3806 [2021-08-06 15:42:40,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 929.4ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:42:40,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-08-06 15:42:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3610. [2021-08-06 15:42:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3610 states, 3609 states have (on average 3.536159600997506) internal successors, (12762), 3609 states have internal predecessors, (12762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3610 states to 3610 states and 12762 transitions. [2021-08-06 15:42:40,277 INFO L78 Accepts]: Start accepts. Automaton has 3610 states and 12762 transitions. Word has length 29 [2021-08-06 15:42:40,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:40,278 INFO L470 AbstractCegarLoop]: Abstraction has 3610 states and 12762 transitions. [2021-08-06 15:42:40,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:40,278 INFO L276 IsEmpty]: Start isEmpty. Operand 3610 states and 12762 transitions. [2021-08-06 15:42:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:42:40,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:40,283 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, 1, 1, 1, 1] [2021-08-06 15:42:40,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 15:42:40,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-08-06 15:42:40,483 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1837877886, now seen corresponding path program 32 times [2021-08-06 15:42:40,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:40,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888535344] [2021-08-06 15:42:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:40,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:41,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:41,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888535344] [2021-08-06 15:42:41,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888535344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:41,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675576416] [2021-08-06 15:42:41,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:42:41,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:41,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:41,191 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:42:41,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 15:42:45,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:42:45,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:45,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:42:45,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:46,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:42:46,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:42:46,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 15:42:46,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:42:46,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:42:46,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:42:46,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:42:46,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 74 [2021-08-06 15:42:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:47,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675576416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:47,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:47,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-06 15:42:47,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536090612] [2021-08-06 15:42:47,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:42:47,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:47,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:42:47,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:42:47,348 INFO L87 Difference]: Start difference. First operand 3610 states and 12762 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-08-06 15:42:50,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:50,239 INFO L93 Difference]: Finished difference Result 5102 states and 17550 transitions. [2021-08-06 15:42:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:42:50,239 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 29 [2021-08-06 15:42:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:50,249 INFO L225 Difference]: With dead ends: 5102 [2021-08-06 15:42:50,249 INFO L226 Difference]: Without dead ends: 5072 [2021-08-06 15:42:50,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 2419.0ms TimeCoverageRelationStatistics Valid=281, Invalid=2071, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:42:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2021-08-06 15:42:50,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 3673. [2021-08-06 15:42:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 3672 states have (on average 3.5334967320261437) internal successors, (12975), 3672 states have internal predecessors, (12975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:50,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 12975 transitions. [2021-08-06 15:42:50,310 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 12975 transitions. Word has length 29 [2021-08-06 15:42:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:50,310 INFO L470 AbstractCegarLoop]: Abstraction has 3673 states and 12975 transitions. [2021-08-06 15:42:50,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-08-06 15:42:50,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 12975 transitions. [2021-08-06 15:42:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:42:50,315 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:50,315 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, 1, 1, 1, 1] [2021-08-06 15:42:50,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-06 15:42:50,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:50,515 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:50,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:50,516 INFO L82 PathProgramCache]: Analyzing trace with hash 819565762, now seen corresponding path program 33 times [2021-08-06 15:42:50,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:50,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191982249] [2021-08-06 15:42:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:50,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:51,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:51,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191982249] [2021-08-06 15:42:51,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191982249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:51,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132752027] [2021-08-06 15:42:51,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:42:51,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:51,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:51,104 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:42:51,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 15:42:55,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:42:55,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:42:55,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:42:55,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:42:57,155 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 15:42:57,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 90 treesize of output 60 [2021-08-06 15:42:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:57,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132752027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:57,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:42:57,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:42:57,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567374508] [2021-08-06 15:42:57,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:42:57,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:42:57,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:42:57,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:42:57,347 INFO L87 Difference]: Start difference. First operand 3673 states and 12975 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:42:58,912 INFO L93 Difference]: Finished difference Result 4037 states and 13979 transitions. [2021-08-06 15:42:58,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:42:58,912 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:42:58,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:42:58,920 INFO L225 Difference]: With dead ends: 4037 [2021-08-06 15:42:58,920 INFO L226 Difference]: Without dead ends: 4022 [2021-08-06 15:42:58,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1549.2ms TimeCoverageRelationStatistics Valid=289, Invalid=1351, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:42:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2021-08-06 15:42:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 3677. [2021-08-06 15:42:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 3676 states have (on average 3.5340043525571274) internal successors, (12991), 3676 states have internal predecessors, (12991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 12991 transitions. [2021-08-06 15:42:58,973 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 12991 transitions. Word has length 29 [2021-08-06 15:42:58,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:42:58,973 INFO L470 AbstractCegarLoop]: Abstraction has 3677 states and 12991 transitions. [2021-08-06 15:42:58,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:42:58,974 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 12991 transitions. [2021-08-06 15:42:58,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:42:58,979 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:42:58,979 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, 1, 1, 1, 1] [2021-08-06 15:42:59,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 15:42:59,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:59,179 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:42:59,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:42:59,180 INFO L82 PathProgramCache]: Analyzing trace with hash 844698198, now seen corresponding path program 34 times [2021-08-06 15:42:59,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:42:59,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430529399] [2021-08-06 15:42:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:42:59,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:42:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:42:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:42:59,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:42:59,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430529399] [2021-08-06 15:42:59,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430529399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:42:59,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620653723] [2021-08-06 15:42:59,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:42:59,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:42:59,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:42:59,793 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:42:59,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 15:43:04,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:43:04,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:04,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:43:04,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:05,700 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:43:05,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 74 [2021-08-06 15:43:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:06,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620653723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:06,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:06,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:43:06,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066205245] [2021-08-06 15:43:06,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:43:06,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:06,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:43:06,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:43:06,192 INFO L87 Difference]: Start difference. First operand 3677 states and 12991 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:10,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:10,846 INFO L93 Difference]: Finished difference Result 5711 states and 19750 transitions. [2021-08-06 15:43:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:43:10,847 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:43:10,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:10,861 INFO L225 Difference]: With dead ends: 5711 [2021-08-06 15:43:10,861 INFO L226 Difference]: Without dead ends: 5696 [2021-08-06 15:43:10,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 2286.0ms TimeCoverageRelationStatistics Valid=422, Invalid=1834, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:43:10,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5696 states. [2021-08-06 15:43:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5696 to 3674. [2021-08-06 15:43:10,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3673 states have (on average 3.533623740811326) internal successors, (12979), 3673 states have internal predecessors, (12979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 12979 transitions. [2021-08-06 15:43:10,946 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 12979 transitions. Word has length 29 [2021-08-06 15:43:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:10,946 INFO L470 AbstractCegarLoop]: Abstraction has 3674 states and 12979 transitions. [2021-08-06 15:43:10,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:10,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 12979 transitions. [2021-08-06 15:43:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:43:10,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:10,951 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, 1, 1, 1, 1] [2021-08-06 15:43:10,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-06 15:43:11,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 15:43:11,152 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:11,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:11,152 INFO L82 PathProgramCache]: Analyzing trace with hash 923075916, now seen corresponding path program 35 times [2021-08-06 15:43:11,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:11,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131254173] [2021-08-06 15:43:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:11,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:11,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:11,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131254173] [2021-08-06 15:43:11,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131254173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:11,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261738131] [2021-08-06 15:43:11,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:43:11,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:11,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:11,802 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:43:11,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 15:43:16,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:43:16,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:16,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:43:16,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:17,839 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 15:43:17,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 56 [2021-08-06 15:43:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:18,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261738131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:18,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:18,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-08-06 15:43:18,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870964358] [2021-08-06 15:43:18,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:43:18,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:18,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:43:18,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:43:18,045 INFO L87 Difference]: Start difference. First operand 3674 states and 12979 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:18,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:18,948 INFO L93 Difference]: Finished difference Result 3901 states and 13587 transitions. [2021-08-06 15:43:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:43:18,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 29 [2021-08-06 15:43:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:18,956 INFO L225 Difference]: With dead ends: 3901 [2021-08-06 15:43:18,956 INFO L226 Difference]: Without dead ends: 3886 [2021-08-06 15:43:18,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 958.6ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:43:18,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3886 states. [2021-08-06 15:43:18,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3886 to 3674. [2021-08-06 15:43:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3673 states have (on average 3.533623740811326) internal successors, (12979), 3673 states have internal predecessors, (12979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 12979 transitions. [2021-08-06 15:43:19,007 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 12979 transitions. Word has length 29 [2021-08-06 15:43:19,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:19,008 INFO L470 AbstractCegarLoop]: Abstraction has 3674 states and 12979 transitions. [2021-08-06 15:43:19,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 12979 transitions. [2021-08-06 15:43:19,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:43:19,013 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:19,013 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, 1, 1, 1, 1] [2021-08-06 15:43:19,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-08-06 15:43:19,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 15:43:19,213 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:19,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:19,214 INFO L82 PathProgramCache]: Analyzing trace with hash 345579122, now seen corresponding path program 36 times [2021-08-06 15:43:19,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:19,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817036998] [2021-08-06 15:43:19,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:19,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:19,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:19,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817036998] [2021-08-06 15:43:19,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817036998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:19,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175207937] [2021-08-06 15:43:19,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:43:19,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:19,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:19,938 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:43:19,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 15:43:25,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:43:25,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:25,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:43:25,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:43:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:43:26,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:43:26,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:43:26,025 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:43:26,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-08-06 15:43:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:26,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175207937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:26,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:26,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-06 15:43:26,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640276660] [2021-08-06 15:43:26,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:43:26,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:26,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:43:26,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:43:26,518 INFO L87 Difference]: Start difference. First operand 3674 states and 12979 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-08-06 15:43:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:28,655 INFO L93 Difference]: Finished difference Result 5051 states and 17490 transitions. [2021-08-06 15:43:28,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 15:43:28,655 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 29 [2021-08-06 15:43:28,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:28,665 INFO L225 Difference]: With dead ends: 5051 [2021-08-06 15:43:28,665 INFO L226 Difference]: Without dead ends: 5036 [2021-08-06 15:43:28,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1974.3ms TimeCoverageRelationStatistics Valid=311, Invalid=1759, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:43:28,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5036 states. [2021-08-06 15:43:28,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 3668. [2021-08-06 15:43:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 3667 states have (on average 3.531769839105536) internal successors, (12951), 3667 states have internal predecessors, (12951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:28,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 12951 transitions. [2021-08-06 15:43:28,725 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 12951 transitions. Word has length 29 [2021-08-06 15:43:28,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:28,725 INFO L470 AbstractCegarLoop]: Abstraction has 3668 states and 12951 transitions. [2021-08-06 15:43:28,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-08-06 15:43:28,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 12951 transitions. [2021-08-06 15:43:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:43:28,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:28,730 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, 1, 1, 1, 1] [2021-08-06 15:43:28,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 15:43:28,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 15:43:28,939 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:28,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:28,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1736072562, now seen corresponding path program 37 times [2021-08-06 15:43:28,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:28,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276987686] [2021-08-06 15:43:28,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:28,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:29,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:29,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276987686] [2021-08-06 15:43:29,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276987686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:29,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276423084] [2021-08-06 15:43:29,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:43:29,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:29,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:29,571 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:43:29,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 15:43:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:34,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:43:34,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:35,664 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:43:35,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 95 treesize of output 83 [2021-08-06 15:43:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:36,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276423084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:36,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:36,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:43:36,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085818227] [2021-08-06 15:43:36,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:43:36,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:43:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:43:36,162 INFO L87 Difference]: Start difference. First operand 3668 states and 12951 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:39,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:39,058 INFO L93 Difference]: Finished difference Result 4925 states and 17111 transitions. [2021-08-06 15:43:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:43:39,058 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:43:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:39,067 INFO L225 Difference]: With dead ends: 4925 [2021-08-06 15:43:39,067 INFO L226 Difference]: Without dead ends: 4900 [2021-08-06 15:43:39,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 852.6ms TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:43:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4900 states. [2021-08-06 15:43:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4900 to 3668. [2021-08-06 15:43:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 3667 states have (on average 3.531497136623943) internal successors, (12950), 3667 states have internal predecessors, (12950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 12950 transitions. [2021-08-06 15:43:39,132 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 12950 transitions. Word has length 29 [2021-08-06 15:43:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:39,132 INFO L470 AbstractCegarLoop]: Abstraction has 3668 states and 12950 transitions. [2021-08-06 15:43:39,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 12950 transitions. [2021-08-06 15:43:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:43:39,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:39,137 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, 1, 1, 1, 1] [2021-08-06 15:43:39,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-06 15:43:39,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 15:43:39,338 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:39,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:39,338 INFO L82 PathProgramCache]: Analyzing trace with hash 550819334, now seen corresponding path program 38 times [2021-08-06 15:43:39,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:39,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221522366] [2021-08-06 15:43:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:39,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:40,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:40,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221522366] [2021-08-06 15:43:40,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221522366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:40,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963324686] [2021-08-06 15:43:40,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:43:40,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:40,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:40,060 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:43:40,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 15:43:45,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:43:45,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:45,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:43:45,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:46,567 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:43:46,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 90 treesize of output 78 [2021-08-06 15:43:47,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:47,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963324686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:47,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:43:47,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:43:47,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648554061] [2021-08-06 15:43:47,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:43:47,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:43:47,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:43:47,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:43:47,010 INFO L87 Difference]: Start difference. First operand 3668 states and 12950 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-08-06 15:43:52,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:43:52,181 INFO L93 Difference]: Finished difference Result 5439 states and 18648 transitions. [2021-08-06 15:43:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 15:43:52,181 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 29 [2021-08-06 15:43:52,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:43:52,191 INFO L225 Difference]: With dead ends: 5439 [2021-08-06 15:43:52,191 INFO L226 Difference]: Without dead ends: 5409 [2021-08-06 15:43:52,192 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 4448.4ms TimeCoverageRelationStatistics Valid=620, Invalid=4492, Unknown=0, NotChecked=0, Total=5112 [2021-08-06 15:43:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5409 states. [2021-08-06 15:43:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5409 to 3689. [2021-08-06 15:43:52,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3689 states, 3688 states have (on average 3.531182212581345) internal successors, (13023), 3688 states have internal predecessors, (13023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:43:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 13023 transitions. [2021-08-06 15:43:52,257 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 13023 transitions. Word has length 29 [2021-08-06 15:43:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:43:52,258 INFO L470 AbstractCegarLoop]: Abstraction has 3689 states and 13023 transitions. [2021-08-06 15:43:52,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-08-06 15:43:52,258 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 13023 transitions. [2021-08-06 15:43:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:43:52,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:43:52,263 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, 1, 1, 1, 1] [2021-08-06 15:43:52,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-08-06 15:43:52,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-06 15:43:52,465 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:43:52,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:43:52,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1494928490, now seen corresponding path program 39 times [2021-08-06 15:43:52,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:43:52,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604668352] [2021-08-06 15:43:52,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:43:52,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:43:52,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:43:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:43:53,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:43:53,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604668352] [2021-08-06 15:43:53,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604668352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:43:53,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583825178] [2021-08-06 15:43:53,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:43:53,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:43:53,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:43:53,243 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:43:53,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 15:43:58,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:43:58,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:43:58,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 15:43:58,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:43:59,343 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:43:59,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 90 treesize of output 78 [2021-08-06 15:44:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:00,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583825178] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:00,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:00,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:44:00,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526713196] [2021-08-06 15:44:00,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:44:00,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:00,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:44:00,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:44:00,134 INFO L87 Difference]: Start difference. First operand 3689 states and 13023 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:03,290 INFO L93 Difference]: Finished difference Result 5793 states and 20057 transitions. [2021-08-06 15:44:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:44:03,291 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:44:03,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:03,302 INFO L225 Difference]: With dead ends: 5793 [2021-08-06 15:44:03,302 INFO L226 Difference]: Without dead ends: 5778 [2021-08-06 15:44:03,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2937.9ms TimeCoverageRelationStatistics Valid=537, Invalid=2325, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:44:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5778 states. [2021-08-06 15:44:03,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5778 to 3690. [2021-08-06 15:44:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3690 states, 3689 states have (on average 3.5313092979127134) internal successors, (13027), 3689 states have internal predecessors, (13027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:03,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3690 states to 3690 states and 13027 transitions. [2021-08-06 15:44:03,373 INFO L78 Accepts]: Start accepts. Automaton has 3690 states and 13027 transitions. Word has length 29 [2021-08-06 15:44:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:03,373 INFO L470 AbstractCegarLoop]: Abstraction has 3690 states and 13027 transitions. [2021-08-06 15:44:03,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3690 states and 13027 transitions. [2021-08-06 15:44:03,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:44:03,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:03,378 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, 1, 1, 1, 1] [2021-08-06 15:44:03,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-06 15:44:03,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-06 15:44:03,581 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:03,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1980239700, now seen corresponding path program 40 times [2021-08-06 15:44:03,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:03,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143686294] [2021-08-06 15:44:03,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:03,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:04,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:04,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143686294] [2021-08-06 15:44:04,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143686294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:04,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977348472] [2021-08-06 15:44:04,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:44:04,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:04,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:04,386 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:04,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 15:44:09,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:44:09,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:09,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:44:09,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:10,879 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 15:44:10,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 90 treesize of output 60 [2021-08-06 15:44:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:11,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977348472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:11,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:11,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:44:11,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69731222] [2021-08-06 15:44:11,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:44:11,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:11,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:44:11,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:44:11,112 INFO L87 Difference]: Start difference. First operand 3690 states and 13027 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:12,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:12,886 INFO L93 Difference]: Finished difference Result 4813 states and 16743 transitions. [2021-08-06 15:44:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:44:12,886 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:44:12,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:12,895 INFO L225 Difference]: With dead ends: 4813 [2021-08-06 15:44:12,895 INFO L226 Difference]: Without dead ends: 4798 [2021-08-06 15:44:12,896 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1812.9ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:44:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-08-06 15:44:12,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 3693. [2021-08-06 15:44:12,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3693 states, 3692 states have (on average 3.5306067172264357) internal successors, (13035), 3692 states have internal predecessors, (13035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3693 states to 3693 states and 13035 transitions. [2021-08-06 15:44:12,953 INFO L78 Accepts]: Start accepts. Automaton has 3693 states and 13035 transitions. Word has length 29 [2021-08-06 15:44:12,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:12,953 INFO L470 AbstractCegarLoop]: Abstraction has 3693 states and 13035 transitions. [2021-08-06 15:44:12,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:12,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3693 states and 13035 transitions. [2021-08-06 15:44:12,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:44:12,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:12,959 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, 1, 1, 1, 1] [2021-08-06 15:44:12,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:13,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:13,159 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:13,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:13,160 INFO L82 PathProgramCache]: Analyzing trace with hash -684494438, now seen corresponding path program 41 times [2021-08-06 15:44:13,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:13,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92707841] [2021-08-06 15:44:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:13,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:13,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:13,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92707841] [2021-08-06 15:44:13,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92707841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:13,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296657271] [2021-08-06 15:44:13,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:44:13,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:13,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:13,669 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:13,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 15:44:19,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:44:19,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:19,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:44:19,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:20,125 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 15:44:20,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 56 [2021-08-06 15:44:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:20,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296657271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:20,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:20,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:44:20,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122053063] [2021-08-06 15:44:20,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:44:20,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:20,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:44:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:44:20,352 INFO L87 Difference]: Start difference. First operand 3693 states and 13035 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:20,986 INFO L93 Difference]: Finished difference Result 4728 states and 16516 transitions. [2021-08-06 15:44:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:44:20,986 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:44:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:20,995 INFO L225 Difference]: With dead ends: 4728 [2021-08-06 15:44:20,996 INFO L226 Difference]: Without dead ends: 4713 [2021-08-06 15:44:20,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 811.3ms TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:44:20,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-08-06 15:44:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 3693. [2021-08-06 15:44:21,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3693 states, 3692 states have (on average 3.5306067172264357) internal successors, (13035), 3692 states have internal predecessors, (13035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3693 states to 3693 states and 13035 transitions. [2021-08-06 15:44:21,056 INFO L78 Accepts]: Start accepts. Automaton has 3693 states and 13035 transitions. Word has length 29 [2021-08-06 15:44:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:21,056 INFO L470 AbstractCegarLoop]: Abstraction has 3693 states and 13035 transitions. [2021-08-06 15:44:21,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3693 states and 13035 transitions. [2021-08-06 15:44:21,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:44:21,061 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:21,061 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, 1, 1, 1, 1] [2021-08-06 15:44:21,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:21,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:21,262 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:21,262 INFO L82 PathProgramCache]: Analyzing trace with hash 195014414, now seen corresponding path program 42 times [2021-08-06 15:44:21,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:21,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669733877] [2021-08-06 15:44:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:21,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:21,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:21,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669733877] [2021-08-06 15:44:21,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669733877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:21,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511471339] [2021-08-06 15:44:21,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:44:21,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:21,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:21,785 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:21,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 15:44:27,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:44:27,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:27,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:44:27,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:28,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:44:28,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:44:28,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:44:28,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:44:28,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:44:28,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-08-06 15:44:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:29,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511471339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:29,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:29,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-06 15:44:29,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512992625] [2021-08-06 15:44:29,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:44:29,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:29,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:44:29,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:44:29,172 INFO L87 Difference]: Start difference. First operand 3693 states and 13035 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-08-06 15:44:32,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:32,308 INFO L93 Difference]: Finished difference Result 5984 states and 20566 transitions. [2021-08-06 15:44:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 15:44:32,308 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 29 [2021-08-06 15:44:32,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:32,320 INFO L225 Difference]: With dead ends: 5984 [2021-08-06 15:44:32,320 INFO L226 Difference]: Without dead ends: 5954 [2021-08-06 15:44:32,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 2854.8ms TimeCoverageRelationStatistics Valid=364, Invalid=2288, Unknown=0, NotChecked=0, Total=2652 [2021-08-06 15:44:32,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5954 states. [2021-08-06 15:44:32,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5954 to 3735. [2021-08-06 15:44:32,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3735 states, 3734 states have (on average 3.5313336904124264) internal successors, (13186), 3734 states have internal predecessors, (13186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:32,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3735 states to 3735 states and 13186 transitions. [2021-08-06 15:44:32,391 INFO L78 Accepts]: Start accepts. Automaton has 3735 states and 13186 transitions. Word has length 29 [2021-08-06 15:44:32,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:32,391 INFO L470 AbstractCegarLoop]: Abstraction has 3735 states and 13186 transitions. [2021-08-06 15:44:32,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2021-08-06 15:44:32,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3735 states and 13186 transitions. [2021-08-06 15:44:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:44:32,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:32,397 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, 1, 1, 1, 1] [2021-08-06 15:44:32,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:32,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:32,597 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:32,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1198988290, now seen corresponding path program 43 times [2021-08-06 15:44:32,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:32,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114003414] [2021-08-06 15:44:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:32,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:33,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:33,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114003414] [2021-08-06 15:44:33,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114003414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:33,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433537136] [2021-08-06 15:44:33,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:44:33,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:33,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:33,120 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:33,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 15:44:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:38,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:44:38,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:39,915 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 15:44:39,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 90 treesize of output 60 [2021-08-06 15:44:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:40,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433537136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:40,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:40,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:44:40,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898411202] [2021-08-06 15:44:40,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:44:40,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:40,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:44:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:44:40,116 INFO L87 Difference]: Start difference. First operand 3735 states and 13186 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:41,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:41,488 INFO L93 Difference]: Finished difference Result 5265 states and 18320 transitions. [2021-08-06 15:44:41,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:44:41,488 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:44:41,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:41,498 INFO L225 Difference]: With dead ends: 5265 [2021-08-06 15:44:41,498 INFO L226 Difference]: Without dead ends: 5250 [2021-08-06 15:44:41,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1405.5ms TimeCoverageRelationStatistics Valid=298, Invalid=1262, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:44:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5250 states. [2021-08-06 15:44:41,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5250 to 3736. [2021-08-06 15:44:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3736 states, 3735 states have (on average 3.531726907630522) internal successors, (13191), 3735 states have internal predecessors, (13191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3736 states to 3736 states and 13191 transitions. [2021-08-06 15:44:41,561 INFO L78 Accepts]: Start accepts. Automaton has 3736 states and 13191 transitions. Word has length 29 [2021-08-06 15:44:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:41,561 INFO L470 AbstractCegarLoop]: Abstraction has 3736 states and 13191 transitions. [2021-08-06 15:44:41,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3736 states and 13191 transitions. [2021-08-06 15:44:41,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:44:41,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:41,589 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, 1, 1, 1, 1] [2021-08-06 15:44:41,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:41,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:41,793 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash -660228710, now seen corresponding path program 44 times [2021-08-06 15:44:41,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:41,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433782105] [2021-08-06 15:44:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:41,794 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:42,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:42,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433782105] [2021-08-06 15:44:42,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433782105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:42,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783981878] [2021-08-06 15:44:42,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:44:42,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:42,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:42,397 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:42,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 15:44:48,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:44:48,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:48,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:44:48,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:49,063 INFO L354 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2021-08-06 15:44:49,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 99 treesize of output 87 [2021-08-06 15:44:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:49,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783981878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:49,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:44:49,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:44:49,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266368732] [2021-08-06 15:44:49,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:44:49,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:44:49,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:44:49,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:44:49,732 INFO L87 Difference]: Start difference. First operand 3736 states and 13191 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:51,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:44:51,159 INFO L93 Difference]: Finished difference Result 5181 states and 17939 transitions. [2021-08-06 15:44:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:44:51,159 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:44:51,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:44:51,169 INFO L225 Difference]: With dead ends: 5181 [2021-08-06 15:44:51,169 INFO L226 Difference]: Without dead ends: 5131 [2021-08-06 15:44:51,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1314.7ms TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:44:51,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5131 states. [2021-08-06 15:44:51,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5131 to 3757. [2021-08-06 15:44:51,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3757 states, 3756 states have (on average 3.531416400425985) internal successors, (13264), 3756 states have internal predecessors, (13264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3757 states to 3757 states and 13264 transitions. [2021-08-06 15:44:51,230 INFO L78 Accepts]: Start accepts. Automaton has 3757 states and 13264 transitions. Word has length 29 [2021-08-06 15:44:51,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:44:51,230 INFO L470 AbstractCegarLoop]: Abstraction has 3757 states and 13264 transitions. [2021-08-06 15:44:51,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:44:51,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3757 states and 13264 transitions. [2021-08-06 15:44:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:44:51,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:44:51,235 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, 1, 1, 1, 1] [2021-08-06 15:44:51,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2021-08-06 15:44:51,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-08-06 15:44:51,436 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:44:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:44:51,436 INFO L82 PathProgramCache]: Analyzing trace with hash -653608058, now seen corresponding path program 45 times [2021-08-06 15:44:51,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:44:51,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632718052] [2021-08-06 15:44:51,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:44:51,436 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:44:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:44:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:44:52,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:44:52,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632718052] [2021-08-06 15:44:52,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632718052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:44:52,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258504864] [2021-08-06 15:44:52,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:44:52,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:44:52,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:44:52,095 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:44:52,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 15:44:57,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:44:57,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:44:57,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-06 15:44:57,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:44:58,621 INFO L354 Elim1Store]: treesize reduction 14, result has 78.5 percent of original size [2021-08-06 15:44:58,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 90 treesize of output 104 [2021-08-06 15:45:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:45:00,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258504864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:45:00,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:45:00,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:45:00,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128661754] [2021-08-06 15:45:00,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:45:00,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:45:00,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:45:00,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:45:00,053 INFO L87 Difference]: Start difference. First operand 3757 states and 13264 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:45:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:45:02,454 INFO L93 Difference]: Finished difference Result 5602 states and 19260 transitions. [2021-08-06 15:45:02,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 15:45:02,454 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:45:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:45:02,465 INFO L225 Difference]: With dead ends: 5602 [2021-08-06 15:45:02,465 INFO L226 Difference]: Without dead ends: 5552 [2021-08-06 15:45:02,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 2246.9ms TimeCoverageRelationStatistics Valid=411, Invalid=2039, Unknown=0, NotChecked=0, Total=2450 [2021-08-06 15:45:02,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2021-08-06 15:45:02,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 3775. [2021-08-06 15:45:02,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3775 states, 3774 states have (on average 3.532856385797562) internal successors, (13333), 3774 states have internal predecessors, (13333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:45:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3775 states to 3775 states and 13333 transitions. [2021-08-06 15:45:02,531 INFO L78 Accepts]: Start accepts. Automaton has 3775 states and 13333 transitions. Word has length 29 [2021-08-06 15:45:02,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:45:02,531 INFO L470 AbstractCegarLoop]: Abstraction has 3775 states and 13333 transitions. [2021-08-06 15:45:02,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:45:02,531 INFO L276 IsEmpty]: Start isEmpty. Operand 3775 states and 13333 transitions. [2021-08-06 15:45:02,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:45:02,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:45:02,536 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, 1, 1, 1, 1] [2021-08-06 15:45:02,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-08-06 15:45:02,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-06 15:45:02,737 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:45:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:45:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash 181014972, now seen corresponding path program 46 times [2021-08-06 15:45:02,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:45:02,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049148717] [2021-08-06 15:45:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:45:02,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:45:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:45:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:45:03,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:45:03,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049148717] [2021-08-06 15:45:03,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049148717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:45:03,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60061793] [2021-08-06 15:45:03,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:45:03,435 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:45:03,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:45:03,436 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:45:03,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 15:45:09,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:45:09,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:45:09,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:45:09,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:45:10,255 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 15:45:10,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 56 [2021-08-06 15:45:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:45:10,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60061793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:45:10,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:45:10,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-06 15:45:10,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546682766] [2021-08-06 15:45:10,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:45:10,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:45:10,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:45:10,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:45:10,525 INFO L87 Difference]: Start difference. First operand 3775 states and 13333 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:45:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:45:12,987 INFO L93 Difference]: Finished difference Result 5124 states and 17738 transitions. [2021-08-06 15:45:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:45:12,988 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:45:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:45:12,997 INFO L225 Difference]: With dead ends: 5124 [2021-08-06 15:45:12,997 INFO L226 Difference]: Without dead ends: 5103 [2021-08-06 15:45:12,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2459.9ms TimeCoverageRelationStatistics Valid=344, Invalid=1636, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:45:13,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5103 states. [2021-08-06 15:45:13,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5103 to 3794. [2021-08-06 15:45:13,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 3.53124176113894) internal successors, (13394), 3793 states have internal predecessors, (13394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:45:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 13394 transitions. [2021-08-06 15:45:13,052 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 13394 transitions. Word has length 29 [2021-08-06 15:45:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:45:13,052 INFO L470 AbstractCegarLoop]: Abstraction has 3794 states and 13394 transitions. [2021-08-06 15:45:13,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:45:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 13394 transitions. [2021-08-06 15:45:13,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:45:13,057 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:45:13,057 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, 1, 1, 1, 1] [2021-08-06 15:45:13,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 15:45:13,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:45:13,259 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:45:13,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:45:13,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1245137734, now seen corresponding path program 47 times [2021-08-06 15:45:13,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:45:13,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492403041] [2021-08-06 15:45:13,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:45:13,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:45:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:45:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:45:13,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:45:13,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492403041] [2021-08-06 15:45:13,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492403041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:45:13,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613471926] [2021-08-06 15:45:13,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:45:13,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:45:13,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:45:13,638 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:45:13,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 15:45:19,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:45:19,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:45:19,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:45:19,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:45:20,709 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 15:45:20,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 95 treesize of output 65 [2021-08-06 15:45:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:45:20,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613471926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:45:20,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:45:20,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-08-06 15:45:20,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747844203] [2021-08-06 15:45:20,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:45:20,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:45:20,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:45:20,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:45:20,939 INFO L87 Difference]: Start difference. First operand 3794 states and 13394 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:45:22,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:45:22,319 INFO L93 Difference]: Finished difference Result 4670 states and 16124 transitions. [2021-08-06 15:45:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:45:22,319 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-06 15:45:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:45:22,328 INFO L225 Difference]: With dead ends: 4670 [2021-08-06 15:45:22,328 INFO L226 Difference]: Without dead ends: 4655 [2021-08-06 15:45:22,328 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1334.1ms TimeCoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:45:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4655 states. [2021-08-06 15:45:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4655 to 3800. [2021-08-06 15:45:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 3.5311924190576467) internal successors, (13415), 3799 states have internal predecessors, (13415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:45:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 13415 transitions. [2021-08-06 15:45:22,385 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 13415 transitions. Word has length 29 [2021-08-06 15:45:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:45:22,385 INFO L470 AbstractCegarLoop]: Abstraction has 3800 states and 13415 transitions. [2021-08-06 15:45:22,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:45:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 13415 transitions. [2021-08-06 15:45:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:45:22,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:45:22,390 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, 1, 1, 1, 1] [2021-08-06 15:45:22,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2021-08-06 15:45:22,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 15:45:22,590 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:45:22,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:45:22,591 INFO L82 PathProgramCache]: Analyzing trace with hash -978949302, now seen corresponding path program 48 times [2021-08-06 15:45:22,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:45:22,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624906394] [2021-08-06 15:45:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:45:22,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:45:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:45:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:45:22,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:45:22,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624906394] [2021-08-06 15:45:22,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624906394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:45:22,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412598315] [2021-08-06 15:45:22,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:45:22,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:45:22,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:45:22,981 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:45:22,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 15:45:29,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:45:29,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:45:29,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:45:29,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:45:30,070 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 15:45:30,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 95 treesize of output 65 [2021-08-06 15:45:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:45:30,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412598315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:45:30,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:45:30,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-08-06 15:45:30,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213665927] [2021-08-06 15:45:30,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:45:30,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:45:30,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:45:30,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:45:30,298 INFO L87 Difference]: Start difference. First operand 3800 states and 13415 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-08-06 15:45:31,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:45:31,238 INFO L93 Difference]: Finished difference Result 5236 states and 18165 transitions. [2021-08-06 15:45:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:45:31,239 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 29 [2021-08-06 15:45:31,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:45:31,248 INFO L225 Difference]: With dead ends: 5236 [2021-08-06 15:45:31,248 INFO L226 Difference]: Without dead ends: 5215 [2021-08-06 15:45:31,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 939.4ms TimeCoverageRelationStatistics Valid=263, Invalid=997, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:45:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5215 states. [2021-08-06 15:45:31,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5215 to 3805. [2021-08-06 15:45:31,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3805 states, 3804 states have (on average 3.5360147213459516) internal successors, (13451), 3804 states have internal predecessors, (13451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:45:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3805 states to 3805 states and 13451 transitions. [2021-08-06 15:45:31,334 INFO L78 Accepts]: Start accepts. Automaton has 3805 states and 13451 transitions. Word has length 29 [2021-08-06 15:45:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:45:31,335 INFO L470 AbstractCegarLoop]: Abstraction has 3805 states and 13451 transitions. [2021-08-06 15:45:31,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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) [2021-08-06 15:45:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3805 states and 13451 transitions. [2021-08-06 15:45:31,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-06 15:45:31,340 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:45:31,340 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, 1, 1, 1, 1] [2021-08-06 15:45:31,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-06 15:45:31,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 15:45:31,540 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:45:31,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:45:31,541 INFO L82 PathProgramCache]: Analyzing trace with hash -61121262, now seen corresponding path program 49 times [2021-08-06 15:45:31,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:45:31,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339525110] [2021-08-06 15:45:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:45:31,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:45:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:45:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:45:32,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:45:32,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339525110] [2021-08-06 15:45:32,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339525110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:45:32,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250011976] [2021-08-06 15:45:32,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:45:32,080 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:45:32,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:45:32,081 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:45:32,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 15:45:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:45:38,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 15:45:38,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-08-06 15:45:39,091 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:45:39,103 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:45:39,103 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:45:39,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2021-08-06 15:45:39,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:45:39,292 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. [2021-08-06 15:45:39,294 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:45:39,294 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:45:39,294 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 15:45:39,298 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:45:39,298 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:45:39,299 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:45:39 BasicIcfg [2021-08-06 15:45:39,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:45:39,300 INFO L168 Benchmark]: Toolchain (without parser) took 704941.68 ms. Allocated memory was 199.2 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 179.8 MB in the beginning and 1.0 GB in the end (delta: -857.5 MB). Peak memory consumption was 557.2 MB. Max. memory is 8.0 GB. [2021-08-06 15:45:39,300 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 199.2 MB. Free memory was 181.1 MB in the beginning and 181.0 MB in the end (delta: 132.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:45:39,300 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.85 ms. Allocated memory is still 199.2 MB. Free memory was 179.8 MB in the beginning and 178.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:45:39,300 INFO L168 Benchmark]: Boogie Preprocessor took 23.87 ms. Allocated memory is still 199.2 MB. Free memory was 178.3 MB in the beginning and 177.4 MB in the end (delta: 914.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:45:39,300 INFO L168 Benchmark]: RCFGBuilder took 236.57 ms. Allocated memory is still 199.2 MB. Free memory was 177.2 MB in the beginning and 163.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-06 15:45:39,300 INFO L168 Benchmark]: TraceAbstraction took 704647.24 ms. Allocated memory was 199.2 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 163.1 MB in the beginning and 1.0 GB in the end (delta: -874.3 MB). Peak memory consumption was 540.4 MB. Max. memory is 8.0 GB. [2021-08-06 15:45:39,301 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 199.2 MB. Free memory was 181.1 MB in the beginning and 181.0 MB in the end (delta: 132.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.85 ms. Allocated memory is still 199.2 MB. Free memory was 179.8 MB in the beginning and 178.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.87 ms. Allocated memory is still 199.2 MB. Free memory was 178.3 MB in the beginning and 177.4 MB in the end (delta: 914.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 236.57 ms. Allocated memory is still 199.2 MB. Free memory was 177.2 MB in the beginning and 163.6 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 704647.24 ms. Allocated memory was 199.2 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 163.1 MB in the beginning and 1.0 GB in the end (delta: -874.3 MB). Peak memory consumption was 540.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 704539.2ms, OverallIterations: 138, TraceHistogramMax: 2, EmptinessCheckTime: 457.1ms, AutomataDifference: 224390.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 41.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6493 SDtfs, 34373 SDslu, 49823 SDs, 0 SdLazy, 91312 SolverSat, 6017 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 50779.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8002 GetRequests, 2718 SyntacticMatches, 113 SemanticMatches, 5171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84223 ImplicationChecksByTransitivity, 193778.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3805occurred in iteration=137, InterpolantAutomatonStates: 4288, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5230.5ms AutomataMinimizationTime, 137 MinimizatonAttempts, 161855 StatesRemovedByMinimization, 137 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 458.8ms SsaConstructionTime, 1848.1ms SatisfiabilityAnalysisTime, 169308.0ms InterpolantComputationTime, 7328 NumberOfCodeBlocks, 7328 NumberOfCodeBlocksAsserted, 429 NumberOfCheckSat, 7062 ConstructedInterpolants, 137 QuantifiedInterpolants, 101368 SizeOfPredicates, 684 NumberOfNonLiveVariables, 7662 ConjunctsInSsa, 1841 ConjunctsInUnsatCore, 266 InterpolantComputations, 8 PerfectInterpolantSequences, 245/1391 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown