/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/min-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:22:41,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:22:41,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:22:42,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 15:22:42,083 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 15:22:42,122 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:22:42,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:22:42,123 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:22:42,123 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:22:42,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:22:42,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:22:42,126 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:22:42,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:22:42,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:22:42,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:22:42,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:22:42,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:22:42,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:22:42,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:22:42,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:22:42,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:22:42,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:22:42,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:22:42,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:22:42,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:22:42,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:22:42,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:22:42,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:22:42,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:22:42,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:22:42,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:22:42,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:22:42,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:22:42,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:22:42,130 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:22:42,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:22:42,130 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:22:42,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:22:42,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:22:42,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:22:42,457 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:22:42,458 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:22:42,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl [2021-08-06 15:22:42,459 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl' [2021-08-06 15:22:42,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:22:42,561 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:22:42,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:22:42,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:22:42,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:22:42,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:22:42" (1/1) ... [2021-08-06 15:22:42,578 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:22:42" (1/1) ... [2021-08-06 15:22:42,585 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:22:42,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:22:42,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:22:42,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:22:42,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:22:42" (1/1) ... [2021-08-06 15:22:42,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:22:42" (1/1) ... [2021-08-06 15:22:42,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:22:42" (1/1) ... [2021-08-06 15:22:42,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:22:42" (1/1) ... [2021-08-06 15:22:42,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:22:42" (1/1) ... [2021-08-06 15:22:42,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:22:42" (1/1) ... [2021-08-06 15:22:42,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:22:42" (1/1) ... [2021-08-06 15:22:42,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:22:42,610 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:22:42,610 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:22:42,610 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:22:42,611 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:22:42" (1/1) ... [2021-08-06 15:22:42,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:22:42,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:42,638 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 15:22:42,660 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 15:22:42,680 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:22:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:22:42,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:22:42,681 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:22:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:22:42,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:22:42,681 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:22:42,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:22:42,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:22:42,681 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 15:22:42,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 15:22:42,683 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 15:22:42,684 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 15:22:42,863 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:22:42,863 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 15:22:42,865 INFO L202 PluginConnector]: Adding new model min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:22:42 BoogieIcfgContainer [2021-08-06 15:22:42,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:22:42,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:22:42,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:22:42,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:22:42,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:22:42" (1/2) ... [2021-08-06 15:22:42,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72fd35d6 and model type min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:22:42, skipping insertion in model container [2021-08-06 15:22:42,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:22:42" (2/2) ... [2021-08-06 15:22:42,871 INFO L111 eAbstractionObserver]: Analyzing ICFG min-array-hom.wvr.bpl [2021-08-06 15:22:42,875 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:22:42,875 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:22:42,875 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:22:42,875 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:22:42,965 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 15:22:43,003 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:22:43,010 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 15:22:43,011 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 15:22:43,025 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-08-06 15:22:43,061 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:43,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 15:22:43,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:43,071 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:22:43,072 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:43,076 INFO L82 PathProgramCache]: Analyzing trace with hash 541406590, now seen corresponding path program 1 times [2021-08-06 15:22:43,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:43,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748860518] [2021-08-06 15:22:43,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:43,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:43,242 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 15:22:43,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:43,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748860518] [2021-08-06 15:22:43,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748860518] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:22:43,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:22:43,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 15:22:43,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111616940] [2021-08-06 15:22:43,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 15:22:43,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:43,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 15:22:43,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:22:43,262 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:43,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:43,292 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-08-06 15:22:43,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 15:22:43,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 15:22:43,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:43,304 INFO L225 Difference]: With dead ends: 217 [2021-08-06 15:22:43,304 INFO L226 Difference]: Without dead ends: 202 [2021-08-06 15:22:43,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 15:22:43,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-06 15:22:43,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-08-06 15:22:43,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:43,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-08-06 15:22:43,346 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-08-06 15:22:43,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:43,347 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-08-06 15:22:43,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-08-06 15:22:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:22:43,350 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:43,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:22:43,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:22:43,350 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:43,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1033477442, now seen corresponding path program 1 times [2021-08-06 15:22:43,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:43,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626277871] [2021-08-06 15:22:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:43,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:43,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:43,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626277871] [2021-08-06 15:22:43,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626277871] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:22:43,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:22:43,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:22:43,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937505987] [2021-08-06 15:22:43,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 15:22:43,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 15:22:43,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 15:22:43,405 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:43,439 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-08-06 15:22:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 15:22:43,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 15:22:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:43,442 INFO L225 Difference]: With dead ends: 158 [2021-08-06 15:22:43,442 INFO L226 Difference]: Without dead ends: 158 [2021-08-06 15:22:43,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:22:43,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-06 15:22:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-08-06 15:22:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-08-06 15:22:43,454 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-08-06 15:22:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:43,454 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-08-06 15:22:43,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-08-06 15:22:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 15:22:43,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:43,456 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:22:43,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 15:22:43,456 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:43,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:43,457 INFO L82 PathProgramCache]: Analyzing trace with hash -324870244, now seen corresponding path program 1 times [2021-08-06 15:22:43,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:43,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758916438] [2021-08-06 15:22:43,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:43,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:43,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:43,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758916438] [2021-08-06 15:22:43,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758916438] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:22:43,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:22:43,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 15:22:43,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32615307] [2021-08-06 15:22:43,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:22:43,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:43,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:22:43,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:22:43,512 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:43,581 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-08-06 15:22:43,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:22:43,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 15:22:43,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:43,585 INFO L225 Difference]: With dead ends: 183 [2021-08-06 15:22:43,586 INFO L226 Difference]: Without dead ends: 183 [2021-08-06 15:22:43,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:22:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-08-06 15:22:43,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-08-06 15:22:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-08-06 15:22:43,611 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-08-06 15:22:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:43,612 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-08-06 15:22:43,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-08-06 15:22:43,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:22:43,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:43,617 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] [2021-08-06 15:22:43,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 15:22:43,618 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:43,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:43,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1959936804, now seen corresponding path program 1 times [2021-08-06 15:22:43,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:43,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239691883] [2021-08-06 15:22:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:43,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:44,254 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 15:22:44,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:44,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239691883] [2021-08-06 15:22:44,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239691883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:44,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380157854] [2021-08-06 15:22:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:44,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:44,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:44,261 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 15:22:44,263 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 15:22:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:44,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:22:44,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:45,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-08-06 15:22:45,256 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 15:22:45,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380157854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:45,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:45,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:22:45,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881830080] [2021-08-06 15:22:45,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:22:45,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:45,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:22:45,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:22:45,258 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:45,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:45,526 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-08-06 15:22:45,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:22:45,527 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:22:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:45,529 INFO L225 Difference]: With dead ends: 330 [2021-08-06 15:22:45,529 INFO L226 Difference]: Without dead ends: 315 [2021-08-06 15:22:45,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:22:45,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-08-06 15:22:45,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-08-06 15:22:45,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-08-06 15:22:45,542 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-08-06 15:22:45,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:45,542 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-08-06 15:22:45,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:45,542 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-08-06 15:22:45,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:22:45,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:45,543 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] [2021-08-06 15:22:45,572 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 15:22:45,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:45,764 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:45,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2127745896, now seen corresponding path program 2 times [2021-08-06 15:22:45,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:45,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793451934] [2021-08-06 15:22:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:45,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:46,025 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 15:22:46,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:46,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793451934] [2021-08-06 15:22:46,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793451934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:46,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354603315] [2021-08-06 15:22:46,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:22:46,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:46,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:46,027 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 15:22:46,035 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 15:22:46,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:22:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:46,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:22:46,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:46,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:22:46,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 45 [2021-08-06 15:22:47,196 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 15:22:47,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354603315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:47,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:47,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-08-06 15:22:47,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460883603] [2021-08-06 15:22:47,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:22:47,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:22:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:22:47,199 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) 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 15:22:47,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:47,691 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-08-06 15:22:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:22:47,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) 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 22 [2021-08-06 15:22:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:47,694 INFO L225 Difference]: With dead ends: 374 [2021-08-06 15:22:47,694 INFO L226 Difference]: Without dead ends: 359 [2021-08-06 15:22:47,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 508.3ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:22:47,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-08-06 15:22:47,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-08-06 15:22:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-08-06 15:22:47,704 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-08-06 15:22:47,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:47,705 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-08-06 15:22:47,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) 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 15:22:47,705 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-08-06 15:22:47,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:22:47,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:47,706 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] [2021-08-06 15:22:47,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-06 15:22:47,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:47,921 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:47,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1828972448, now seen corresponding path program 3 times [2021-08-06 15:22:47,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:47,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276600046] [2021-08-06 15:22:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:47,923 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:48,173 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 15:22:48,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:48,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276600046] [2021-08-06 15:22:48,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276600046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:48,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024047769] [2021-08-06 15:22:48,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:22:48,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:48,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:48,177 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 15:22:48,206 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 15:22:48,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:22:48,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:48,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:22:48,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:48,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-08-06 15:22:48,906 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 15:22:48,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024047769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:48,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:48,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 15:22:48,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541195946] [2021-08-06 15:22:48,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:22:48,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:48,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:22:48,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:22:48,908 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 12 states, 12 states have (on average 3.25) 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 15:22:49,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:49,092 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-08-06 15:22:49,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:22:49,092 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) 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 22 [2021-08-06 15:22:49,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:49,094 INFO L225 Difference]: With dead ends: 296 [2021-08-06 15:22:49,094 INFO L226 Difference]: Without dead ends: 281 [2021-08-06 15:22:49,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:22:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-08-06 15:22:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-08-06 15:22:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-08-06 15:22:49,102 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-08-06 15:22:49,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:49,102 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-08-06 15:22:49,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) 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 15:22:49,102 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-08-06 15:22:49,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:22:49,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:49,103 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] [2021-08-06 15:22:49,131 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 15:22:49,324 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 15:22:49,325 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:49,325 INFO L82 PathProgramCache]: Analyzing trace with hash -258146848, now seen corresponding path program 4 times [2021-08-06 15:22:49,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:49,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17827957] [2021-08-06 15:22:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:49,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:49,599 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 15:22:49,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:49,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17827957] [2021-08-06 15:22:49,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17827957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:49,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120960053] [2021-08-06 15:22:49,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:22:49,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:49,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:49,601 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 15:22:49,620 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 15:22:49,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:22:49,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:49,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-06 15:22:49,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:50,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:22:50,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2021-08-06 15:22:50,666 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 15:22:50,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120960053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:50,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:50,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:22:50,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151791169] [2021-08-06 15:22:50,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:50,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:50,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:50,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:50,668 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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 15:22:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:50,975 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-08-06 15:22:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:22:50,976 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 22 [2021-08-06 15:22:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:50,978 INFO L225 Difference]: With dead ends: 425 [2021-08-06 15:22:50,978 INFO L226 Difference]: Without dead ends: 410 [2021-08-06 15:22:50,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 320.5ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:22:50,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-06 15:22:50,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-08-06 15:22:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-08-06 15:22:50,987 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-08-06 15:22:50,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:50,988 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-08-06 15:22:50,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 15:22:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-08-06 15:22:50,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:50,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:50,989 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] [2021-08-06 15:22:51,014 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 15:22:51,204 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 15:22:51,205 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:51,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:51,205 INFO L82 PathProgramCache]: Analyzing trace with hash 976010682, now seen corresponding path program 5 times [2021-08-06 15:22:51,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:51,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697634815] [2021-08-06 15:22:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:51,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:51,273 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 15:22:51,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:51,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697634815] [2021-08-06 15:22:51,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697634815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:51,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672151231] [2021-08-06 15:22:51,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:22:51,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:51,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:51,284 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 15:22:51,285 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 15:22:51,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:22:51,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:51,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:51,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:51,677 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 15:22:51,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672151231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:51,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:51,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:22:51,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99208040] [2021-08-06 15:22:51,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:22:51,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:51,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:22:51,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:22:51,679 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 15:22:52,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:52,071 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-08-06 15:22:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:22:52,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 24 [2021-08-06 15:22:52,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:52,075 INFO L225 Difference]: With dead ends: 619 [2021-08-06 15:22:52,076 INFO L226 Difference]: Without dead ends: 619 [2021-08-06 15:22:52,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:22:52,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-06 15:22:52,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-08-06 15:22:52,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-08-06 15:22:52,088 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-08-06 15:22:52,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:52,089 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-08-06 15:22:52,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 15:22:52,089 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-08-06 15:22:52,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:52,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:52,090 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] [2021-08-06 15:22:52,115 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 15:22:52,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:52,305 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash -308162, now seen corresponding path program 6 times [2021-08-06 15:22:52,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:52,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065195244] [2021-08-06 15:22:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:52,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:52,356 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 15:22:52,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:52,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065195244] [2021-08-06 15:22:52,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065195244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:52,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721808079] [2021-08-06 15:22:52,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:22:52,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:52,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:52,358 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 15:22:52,376 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 15:22:52,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:22:52,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:52,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:52,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:52,817 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 15:22:52,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721808079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:52,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:52,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:52,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356378171] [2021-08-06 15:22:52,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:52,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:52,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:52,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:52,818 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:22:53,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:53,588 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-08-06 15:22:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:22:53,588 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-08-06 15:22:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:53,594 INFO L225 Difference]: With dead ends: 1078 [2021-08-06 15:22:53,594 INFO L226 Difference]: Without dead ends: 1078 [2021-08-06 15:22:53,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 464.0ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:22:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-06 15:22:53,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-08-06 15:22:53,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:53,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-08-06 15:22:53,611 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-08-06 15:22:53,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:53,611 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-08-06 15:22:53,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:22:53,611 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-08-06 15:22:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:53,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:53,612 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] [2021-08-06 15:22:53,639 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 15:22:53,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:53,836 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:53,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:53,836 INFO L82 PathProgramCache]: Analyzing trace with hash 566643918, now seen corresponding path program 7 times [2021-08-06 15:22:53,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:53,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000962177] [2021-08-06 15:22:53,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:53,836 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:53,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:53,911 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 15:22:53,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:53,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000962177] [2021-08-06 15:22:53,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000962177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:53,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358772608] [2021-08-06 15:22:53,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:22:53,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:53,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:53,913 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 15:22:53,914 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 15:22:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:54,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:54,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:54,344 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 15:22:54,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358772608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:54,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:54,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:22:54,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101485146] [2021-08-06 15:22:54,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:54,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:54,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:54,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:54,346 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:22:55,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:55,044 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-08-06 15:22:55,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:22:55,044 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-08-06 15:22:55,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:55,049 INFO L225 Difference]: With dead ends: 951 [2021-08-06 15:22:55,049 INFO L226 Difference]: Without dead ends: 951 [2021-08-06 15:22:55,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 445.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:22:55,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-06 15:22:55,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-08-06 15:22:55,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-08-06 15:22:55,063 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-08-06 15:22:55,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:55,063 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-08-06 15:22:55,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:22:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-08-06 15:22:55,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:55,064 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:55,064 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] [2021-08-06 15:22:55,091 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 15:22:55,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:55,279 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:55,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:55,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1502782590, now seen corresponding path program 1 times [2021-08-06 15:22:55,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:55,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432852454] [2021-08-06 15:22:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:55,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:55,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:55,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:55,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432852454] [2021-08-06 15:22:55,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432852454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:55,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036702779] [2021-08-06 15:22:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:55,326 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:55,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:55,341 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 15:22:55,342 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 15:22:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:55,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:22:55,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:55,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036702779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:55,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:55,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 15:22:55,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507107649] [2021-08-06 15:22:55,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:22:55,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:55,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:22:55,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:22:55,730 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:55,840 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-08-06 15:22:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:22:55,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:55,844 INFO L225 Difference]: With dead ends: 669 [2021-08-06 15:22:55,844 INFO L226 Difference]: Without dead ends: 663 [2021-08-06 15:22:55,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:55,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-08-06 15:22:55,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-08-06 15:22:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-08-06 15:22:55,859 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-08-06 15:22:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:55,860 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-08-06 15:22:55,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:55,860 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-08-06 15:22:55,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:55,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:55,862 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] [2021-08-06 15:22:55,889 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 15:22:56,080 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,SelfDestructingSolverStorable10 [2021-08-06 15:22:56,080 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:56,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:56,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1065813882, now seen corresponding path program 8 times [2021-08-06 15:22:56,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:56,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786766705] [2021-08-06 15:22:56,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:56,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:56,137 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 15:22:56,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:56,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786766705] [2021-08-06 15:22:56,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786766705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:56,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422897733] [2021-08-06 15:22:56,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:22:56,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:56,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:56,147 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 15:22:56,148 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 15:22:56,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:22:56,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:56,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:56,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:56,607 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 15:22:56,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422897733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:56,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:56,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:22:56,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340819411] [2021-08-06 15:22:56,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:22:56,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:56,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:22:56,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:56,608 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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 15:22:56,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:56,784 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-08-06 15:22:56,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:22:56,785 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 24 [2021-08-06 15:22:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:56,789 INFO L225 Difference]: With dead ends: 710 [2021-08-06 15:22:56,789 INFO L226 Difference]: Without dead ends: 672 [2021-08-06 15:22:56,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:22:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-08-06 15:22:56,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-08-06 15:22:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:56,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-08-06 15:22:56,805 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-08-06 15:22:56,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:56,805 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-08-06 15:22:56,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 15:22:56,805 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-08-06 15:22:56,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:56,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:56,806 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] [2021-08-06 15:22:56,833 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 15:22:57,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:57,033 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:57,033 INFO L82 PathProgramCache]: Analyzing trace with hash 359856550, now seen corresponding path program 2 times [2021-08-06 15:22:57,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:57,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043837061] [2021-08-06 15:22:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:57,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:57,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:57,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043837061] [2021-08-06 15:22:57,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043837061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:57,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708554880] [2021-08-06 15:22:57,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:22:57,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:57,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:57,079 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 15:22:57,112 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 15:22:57,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:22:57,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:57,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:22:57,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:22:57,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708554880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:57,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:57,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 15:22:57,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618616916] [2021-08-06 15:22:57,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:22:57,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:57,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:22:57,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:22:57,487 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:57,589 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-08-06 15:22:57,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:22:57,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:57,593 INFO L225 Difference]: With dead ends: 830 [2021-08-06 15:22:57,594 INFO L226 Difference]: Without dead ends: 830 [2021-08-06 15:22:57,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:22:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-08-06 15:22:57,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-08-06 15:22:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-08-06 15:22:57,613 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-08-06 15:22:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:57,613 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-08-06 15:22:57,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:57,613 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-08-06 15:22:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:57,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:57,616 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] [2021-08-06 15:22:57,639 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 15:22:57,828 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,SelfDestructingSolverStorable12 [2021-08-06 15:22:57,829 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash -986825016, now seen corresponding path program 9 times [2021-08-06 15:22:57,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:57,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054528333] [2021-08-06 15:22:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:57,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:57,897 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 15:22:57,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:57,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054528333] [2021-08-06 15:22:57,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054528333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:57,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129620726] [2021-08-06 15:22:57,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:22:57,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:57,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:57,913 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 15:22:57,940 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 15:22:58,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:22:58,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:58,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:58,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:58,382 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 15:22:58,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129620726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:58,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:58,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:22:58,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082035439] [2021-08-06 15:22:58,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:22:58,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:58,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:22:58,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:22:58,384 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:58,665 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-08-06 15:22:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:22:58,666 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:58,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:58,671 INFO L225 Difference]: With dead ends: 1196 [2021-08-06 15:22:58,672 INFO L226 Difference]: Without dead ends: 1196 [2021-08-06 15:22:58,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:22:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-06 15:22:58,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-08-06 15:22:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-08-06 15:22:58,693 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-08-06 15:22:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:58,693 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-08-06 15:22:58,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:58,694 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-08-06 15:22:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:58,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:58,695 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] [2021-08-06 15:22:58,719 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 15:22:58,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 15:22:58,919 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:22:58,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:22:58,919 INFO L82 PathProgramCache]: Analyzing trace with hash -201910922, now seen corresponding path program 10 times [2021-08-06 15:22:58,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:22:58,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682926036] [2021-08-06 15:22:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:22:58,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:22:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:22:58,975 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 15:22:58,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:22:58,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682926036] [2021-08-06 15:22:58,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682926036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:58,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666680996] [2021-08-06 15:22:58,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:22:58,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:22:58,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:22:58,977 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 15:22:58,977 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 15:22:59,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:22:59,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:22:59,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:22:59,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:22:59,414 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 15:22:59,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666680996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:22:59,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:22:59,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:22:59,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101510798] [2021-08-06 15:22:59,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:22:59,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:22:59,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:22:59,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:22:59,416 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:59,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:22:59,847 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-08-06 15:22:59,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:22:59,848 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:22:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:22:59,855 INFO L225 Difference]: With dead ends: 1492 [2021-08-06 15:22:59,855 INFO L226 Difference]: Without dead ends: 1492 [2021-08-06 15:22:59,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:22:59,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-08-06 15:22:59,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-08-06 15:22:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:59,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-08-06 15:22:59,881 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-08-06 15:22:59,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:22:59,881 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-08-06 15:22:59,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:22:59,881 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-08-06 15:22:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:22:59,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:22:59,883 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] [2021-08-06 15:22:59,909 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 15:23:00,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 15:23:00,109 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:00,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:00,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1284933578, now seen corresponding path program 11 times [2021-08-06 15:23:00,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:00,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29665377] [2021-08-06 15:23:00,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:00,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:00,157 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 15:23:00,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:00,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29665377] [2021-08-06 15:23:00,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29665377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:00,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284751688] [2021-08-06 15:23:00,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:23:00,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:00,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:00,165 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 15:23:00,166 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 15:23:00,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:23:00,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:00,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:00,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:00,641 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 15:23:00,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284751688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:00,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:00,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:23:00,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268505317] [2021-08-06 15:23:00,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:23:00,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:00,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:23:00,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:23:00,642 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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 15:23:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:00,906 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-08-06 15:23:00,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:23:00,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 24 [2021-08-06 15:23:00,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:00,911 INFO L225 Difference]: With dead ends: 1258 [2021-08-06 15:23:00,911 INFO L226 Difference]: Without dead ends: 1248 [2021-08-06 15:23:00,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:23:00,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-08-06 15:23:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-08-06 15:23:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-08-06 15:23:00,937 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-08-06 15:23:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:00,937 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-08-06 15:23:00,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 15:23:00,937 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-08-06 15:23:00,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:00,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:00,939 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] [2021-08-06 15:23:00,963 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 15:23:01,162 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,SelfDestructingSolverStorable15 [2021-08-06 15:23:01,163 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash 186144540, now seen corresponding path program 12 times [2021-08-06 15:23:01,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:01,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603059215] [2021-08-06 15:23:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:01,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:01,220 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 15:23:01,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:01,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603059215] [2021-08-06 15:23:01,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603059215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:01,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511254127] [2021-08-06 15:23:01,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:23:01,221 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:01,225 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 15:23:01,256 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 15:23:01,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:23:01,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:01,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:01,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:01,754 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 15:23:01,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511254127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:01,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:01,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 15:23:01,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962300813] [2021-08-06 15:23:01,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:23:01,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:01,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:23:01,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:23:01,755 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 15:23:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:02,003 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-08-06 15:23:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:23:02,003 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-08-06 15:23:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:02,008 INFO L225 Difference]: With dead ends: 1329 [2021-08-06 15:23:02,008 INFO L226 Difference]: Without dead ends: 1329 [2021-08-06 15:23:02,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:23:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-08-06 15:23:02,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-08-06 15:23:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-08-06 15:23:02,032 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-08-06 15:23:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:02,032 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-08-06 15:23:02,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 15:23:02,033 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-08-06 15:23:02,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:02,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:02,035 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] [2021-08-06 15:23:02,104 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 15:23:02,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:02,249 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:02,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:02,249 INFO L82 PathProgramCache]: Analyzing trace with hash -246732064, now seen corresponding path program 13 times [2021-08-06 15:23:02,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:02,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922277241] [2021-08-06 15:23:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:02,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:02,306 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 15:23:02,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:02,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922277241] [2021-08-06 15:23:02,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922277241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:02,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197826715] [2021-08-06 15:23:02,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:23:02,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:02,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:02,307 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 15:23:02,307 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 15:23:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:02,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:02,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:02,746 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 15:23:02,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197826715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:02,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:02,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:23:02,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435831473] [2021-08-06 15:23:02,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:23:02,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:02,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:23:02,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:23:02,748 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:03,089 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-08-06 15:23:03,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:23:03,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:03,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:03,095 INFO L225 Difference]: With dead ends: 1548 [2021-08-06 15:23:03,095 INFO L226 Difference]: Without dead ends: 1544 [2021-08-06 15:23:03,096 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:23:03,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-08-06 15:23:03,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-08-06 15:23:03,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-08-06 15:23:03,123 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-08-06 15:23:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:03,123 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-08-06 15:23:03,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-08-06 15:23:03,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:03,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:03,125 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] [2021-08-06 15:23:03,150 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 15:23:03,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 15:23:03,349 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:03,349 INFO L82 PathProgramCache]: Analyzing trace with hash -518741254, now seen corresponding path program 14 times [2021-08-06 15:23:03,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:03,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378050297] [2021-08-06 15:23:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:03,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:03,401 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 15:23:03,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:03,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378050297] [2021-08-06 15:23:03,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378050297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:03,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943156600] [2021-08-06 15:23:03,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:23:03,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:03,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:03,403 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 15:23:03,403 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 15:23:03,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:23:03,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:03,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:03,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:03,881 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 15:23:03,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943156600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:03,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:03,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:23:03,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025499248] [2021-08-06 15:23:03,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:23:03,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:03,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:23:03,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:23:03,883 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:23:04,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:04,603 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-08-06 15:23:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:23:04,604 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-08-06 15:23:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:04,617 INFO L225 Difference]: With dead ends: 2734 [2021-08-06 15:23:04,617 INFO L226 Difference]: Without dead ends: 2734 [2021-08-06 15:23:04,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 396.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:23:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-08-06 15:23:04,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-08-06 15:23:04,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:04,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-08-06 15:23:04,656 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-08-06 15:23:04,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:04,656 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-08-06 15:23:04,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:23:04,656 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-08-06 15:23:04,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:04,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:04,658 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] [2021-08-06 15:23:04,687 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 15:23:04,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:04,873 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:04,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:04,873 INFO L82 PathProgramCache]: Analyzing trace with hash 48210826, now seen corresponding path program 15 times [2021-08-06 15:23:04,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:04,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53989217] [2021-08-06 15:23:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:04,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:04,926 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 15:23:04,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:04,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53989217] [2021-08-06 15:23:04,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53989217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:04,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54521032] [2021-08-06 15:23:04,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:23:04,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:04,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:04,928 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 15:23:04,928 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 15:23:05,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:23:05,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:05,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:05,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:05,447 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 15:23:05,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54521032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:05,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:05,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:23:05,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777854349] [2021-08-06 15:23:05,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:23:05,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:05,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:23:05,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:23:05,448 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:23:06,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:06,119 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-08-06 15:23:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 15:23:06,120 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-08-06 15:23:06,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:06,128 INFO L225 Difference]: With dead ends: 2693 [2021-08-06 15:23:06,129 INFO L226 Difference]: Without dead ends: 2693 [2021-08-06 15:23:06,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 15:23:06,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-08-06 15:23:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-08-06 15:23:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:06,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-08-06 15:23:06,168 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-08-06 15:23:06,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:06,168 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-08-06 15:23:06,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:23:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-08-06 15:23:06,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:06,171 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:06,171 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] [2021-08-06 15:23:06,193 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 15:23:06,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:06,388 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:06,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1124135032, now seen corresponding path program 16 times [2021-08-06 15:23:06,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:06,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854353106] [2021-08-06 15:23:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:06,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:06,457 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 15:23:06,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:06,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854353106] [2021-08-06 15:23:06,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854353106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:06,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054880180] [2021-08-06 15:23:06,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:23:06,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:06,459 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 15:23:06,459 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 15:23:06,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:23:06,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:06,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:06,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:06,938 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 15:23:06,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054880180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:06,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:06,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:23:06,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328853732] [2021-08-06 15:23:06,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:23:06,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:06,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:23:06,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:23:06,940 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:07,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:07,630 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-08-06 15:23:07,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 15:23:07,630 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:07,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:07,636 INFO L225 Difference]: With dead ends: 2677 [2021-08-06 15:23:07,636 INFO L226 Difference]: Without dead ends: 2677 [2021-08-06 15:23:07,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 381.5ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 15:23:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-08-06 15:23:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-08-06 15:23:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-08-06 15:23:07,671 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-08-06 15:23:07,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:07,671 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-08-06 15:23:07,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:07,672 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-08-06 15:23:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:07,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:07,675 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] [2021-08-06 15:23:07,702 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 15:23:07,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:07,895 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:07,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:07,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1042758944, now seen corresponding path program 17 times [2021-08-06 15:23:07,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:07,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140234532] [2021-08-06 15:23:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:07,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:07,945 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 15:23:07,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:07,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140234532] [2021-08-06 15:23:07,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140234532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:07,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754597851] [2021-08-06 15:23:07,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:23:07,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:07,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:07,946 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 15:23:07,949 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 15:23:08,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:23:08,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:08,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:08,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:08,462 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 15:23:08,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754597851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:08,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:08,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:23:08,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830814570] [2021-08-06 15:23:08,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:23:08,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:08,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:23:08,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:23:08,463 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:09,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:09,004 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-08-06 15:23:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:23:09,004 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:09,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:09,009 INFO L225 Difference]: With dead ends: 2474 [2021-08-06 15:23:09,009 INFO L226 Difference]: Without dead ends: 2470 [2021-08-06 15:23:09,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:23:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-08-06 15:23:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-08-06 15:23:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-08-06 15:23:09,044 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-08-06 15:23:09,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:09,044 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-08-06 15:23:09,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:09,044 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-08-06 15:23:09,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:09,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:09,046 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] [2021-08-06 15:23:09,074 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 15:23:09,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:09,269 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:09,269 INFO L82 PathProgramCache]: Analyzing trace with hash -112101728, now seen corresponding path program 18 times [2021-08-06 15:23:09,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:09,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642088981] [2021-08-06 15:23:09,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:09,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:09,321 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 15:23:09,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:09,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642088981] [2021-08-06 15:23:09,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642088981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:09,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929873390] [2021-08-06 15:23:09,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:23:09,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:09,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:09,322 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 15:23:09,324 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 15:23:09,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:23:09,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:09,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:09,862 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 15:23:09,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929873390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:09,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:09,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:23:09,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875147392] [2021-08-06 15:23:09,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:23:09,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:09,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:23:09,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:23:09,863 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:23:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:10,481 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-08-06 15:23:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 15:23:10,481 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-06 15:23:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:10,489 INFO L225 Difference]: With dead ends: 2514 [2021-08-06 15:23:10,489 INFO L226 Difference]: Without dead ends: 2514 [2021-08-06 15:23:10,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 351.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:23:10,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-08-06 15:23:10,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-08-06 15:23:10,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-08-06 15:23:10,524 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-08-06 15:23:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:10,524 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-08-06 15:23:10,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:23:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-08-06 15:23:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:10,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:10,526 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] [2021-08-06 15:23:10,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-06 15:23:10,740 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,SelfDestructingSolverStorable22 [2021-08-06 15:23:10,741 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:10,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1530937426, now seen corresponding path program 19 times [2021-08-06 15:23:10,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:10,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268895192] [2021-08-06 15:23:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:10,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:10,792 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 15:23:10,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:10,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268895192] [2021-08-06 15:23:10,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268895192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:10,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142542147] [2021-08-06 15:23:10,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:23:10,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:10,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:10,794 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 15:23:10,820 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 15:23:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:11,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:11,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:11,350 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 15:23:11,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142542147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:11,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:11,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:23:11,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290950962] [2021-08-06 15:23:11,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:23:11,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:11,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:23:11,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:23:11,351 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:23:11,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:11,925 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-08-06 15:23:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:23:11,925 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-06 15:23:11,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:11,933 INFO L225 Difference]: With dead ends: 2332 [2021-08-06 15:23:11,933 INFO L226 Difference]: Without dead ends: 2328 [2021-08-06 15:23:11,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 329.5ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:23:11,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-08-06 15:23:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-08-06 15:23:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-08-06 15:23:11,967 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-08-06 15:23:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:11,967 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-08-06 15:23:11,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:23:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-08-06 15:23:11,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:11,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:11,977 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] [2021-08-06 15:23:12,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 15:23:12,192 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,SelfDestructingSolverStorable23 [2021-08-06 15:23:12,193 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:12,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:12,193 INFO L82 PathProgramCache]: Analyzing trace with hash 618651874, now seen corresponding path program 3 times [2021-08-06 15:23:12,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:12,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112804110] [2021-08-06 15:23:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:12,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:23:12,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:12,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112804110] [2021-08-06 15:23:12,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112804110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:12,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477586602] [2021-08-06 15:23:12,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:23:12,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:12,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:12,237 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 15:23:12,239 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 15:23:12,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:23:12,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:12,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 15:23:12,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:23:12,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477586602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:12,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:12,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 15:23:12,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491066546] [2021-08-06 15:23:12,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:23:12,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:12,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:23:12,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:23:12,774 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:12,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:12,865 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-08-06 15:23:12,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:23:12,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:12,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:12,868 INFO L225 Difference]: With dead ends: 929 [2021-08-06 15:23:12,868 INFO L226 Difference]: Without dead ends: 929 [2021-08-06 15:23:12,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:23:12,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-08-06 15:23:12,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-08-06 15:23:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:12,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-08-06 15:23:12,899 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-08-06 15:23:12,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:12,899 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-08-06 15:23:12,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:12,900 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-08-06 15:23:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:12,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:12,904 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] [2021-08-06 15:23:12,931 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 15:23:13,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:13,121 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:13,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1548851618, now seen corresponding path program 20 times [2021-08-06 15:23:13,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:13,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842000940] [2021-08-06 15:23:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:13,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:13,165 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 15:23:13,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:13,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842000940] [2021-08-06 15:23:13,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842000940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:13,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136352440] [2021-08-06 15:23:13,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:23:13,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:13,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:13,189 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 15:23:13,190 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 15:23:13,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:23:13,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:13,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:13,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:13,731 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 15:23:13,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136352440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:13,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:13,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 15:23:13,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555821030] [2021-08-06 15:23:13,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:23:13,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:13,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:23:13,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:23:13,732 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:13,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:13,984 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-08-06 15:23:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:23:13,985 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:13,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:13,989 INFO L225 Difference]: With dead ends: 1555 [2021-08-06 15:23:13,989 INFO L226 Difference]: Without dead ends: 1555 [2021-08-06 15:23:13,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:23:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-08-06 15:23:14,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-08-06 15:23:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:14,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-08-06 15:23:14,010 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-08-06 15:23:14,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:14,010 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-08-06 15:23:14,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:14,011 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-08-06 15:23:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:14,014 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:14,014 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] [2021-08-06 15:23:14,041 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 15:23:14,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:14,238 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:14,238 INFO L82 PathProgramCache]: Analyzing trace with hash -843436226, now seen corresponding path program 21 times [2021-08-06 15:23:14,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:14,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650467065] [2021-08-06 15:23:14,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:14,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:14,286 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 15:23:14,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:14,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650467065] [2021-08-06 15:23:14,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650467065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:14,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280991062] [2021-08-06 15:23:14,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:23:14,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:14,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:14,298 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 15:23:14,325 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 15:23:14,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:23:14,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:14,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:14,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:14,900 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 15:23:14,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280991062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:14,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:14,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 15:23:14,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318357476] [2021-08-06 15:23:14,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:23:14,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:14,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:23:14,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:23:14,902 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:15,139 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-08-06 15:23:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:23:15,139 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:15,142 INFO L225 Difference]: With dead ends: 1605 [2021-08-06 15:23:15,142 INFO L226 Difference]: Without dead ends: 1605 [2021-08-06 15:23:15,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:23:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-08-06 15:23:15,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-08-06 15:23:15,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:15,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-08-06 15:23:15,159 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-08-06 15:23:15,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:15,160 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-08-06 15:23:15,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-08-06 15:23:15,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:15,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:15,162 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] [2021-08-06 15:23:15,180 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 15:23:15,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 15:23:15,365 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:15,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:15,366 INFO L82 PathProgramCache]: Analyzing trace with hash -888257368, now seen corresponding path program 22 times [2021-08-06 15:23:15,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:15,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112891068] [2021-08-06 15:23:15,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:15,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:15,408 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 15:23:15,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:15,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112891068] [2021-08-06 15:23:15,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112891068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:15,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526276984] [2021-08-06 15:23:15,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:23:15,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:15,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:15,409 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 15:23:15,410 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 15:23:15,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:23:15,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:15,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:15,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:15,933 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 15:23:15,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526276984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:15,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:15,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 15:23:15,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82255702] [2021-08-06 15:23:15,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:23:15,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:15,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:23:15,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:23:15,934 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:16,124 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-08-06 15:23:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:23:16,125 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:16,128 INFO L225 Difference]: With dead ends: 1524 [2021-08-06 15:23:16,128 INFO L226 Difference]: Without dead ends: 1520 [2021-08-06 15:23:16,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:23:16,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-08-06 15:23:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-08-06 15:23:16,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-08-06 15:23:16,145 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-08-06 15:23:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:16,146 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-08-06 15:23:16,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:16,146 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-08-06 15:23:16,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:16,148 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:16,148 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] [2021-08-06 15:23:16,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 15:23:16,360 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,SelfDestructingSolverStorable27 [2021-08-06 15:23:16,361 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:16,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:16,361 INFO L82 PathProgramCache]: Analyzing trace with hash -290920710, now seen corresponding path program 23 times [2021-08-06 15:23:16,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:16,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338527436] [2021-08-06 15:23:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:16,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:16,407 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 15:23:16,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:16,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338527436] [2021-08-06 15:23:16,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338527436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:16,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698566483] [2021-08-06 15:23:16,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:23:16,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:16,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:16,408 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 15:23:16,409 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 15:23:16,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:23:16,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:16,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:16,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:16,932 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 15:23:16,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698566483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:16,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:16,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 15:23:16,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394466242] [2021-08-06 15:23:16,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:23:16,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:16,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:23:16,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:23:16,933 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:17,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:17,133 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-08-06 15:23:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:23:17,134 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:17,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:17,137 INFO L225 Difference]: With dead ends: 1508 [2021-08-06 15:23:17,137 INFO L226 Difference]: Without dead ends: 1496 [2021-08-06 15:23:17,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:23:17,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-08-06 15:23:17,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-08-06 15:23:17,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-08-06 15:23:17,153 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-08-06 15:23:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:17,153 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-08-06 15:23:17,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-08-06 15:23:17,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:17,155 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:17,155 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] [2021-08-06 15:23:17,171 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 15:23:17,355 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,SelfDestructingSolverStorable28 [2021-08-06 15:23:17,355 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:17,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:17,356 INFO L82 PathProgramCache]: Analyzing trace with hash -817340994, now seen corresponding path program 24 times [2021-08-06 15:23:17,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:17,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463234084] [2021-08-06 15:23:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:17,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:17,416 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 15:23:17,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:17,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463234084] [2021-08-06 15:23:17,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463234084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:17,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937170233] [2021-08-06 15:23:17,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:23:17,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:17,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:17,418 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 15:23:17,438 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 15:23:17,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:23:17,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:17,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:17,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:18,029 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 15:23:18,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937170233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:18,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:18,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:23:18,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683329361] [2021-08-06 15:23:18,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:23:18,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:18,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:23:18,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:23:18,030 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:23:18,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:18,537 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-08-06 15:23:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:23:18,538 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-08-06 15:23:18,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:18,543 INFO L225 Difference]: With dead ends: 2412 [2021-08-06 15:23:18,543 INFO L226 Difference]: Without dead ends: 2412 [2021-08-06 15:23:18,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:23:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-08-06 15:23:18,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-08-06 15:23:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-08-06 15:23:18,574 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-08-06 15:23:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:18,574 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-08-06 15:23:18,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:23:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-08-06 15:23:18,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:18,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:18,576 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] [2021-08-06 15:23:18,604 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 15:23:18,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:18,790 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:18,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:18,791 INFO L82 PathProgramCache]: Analyzing trace with hash -250388914, now seen corresponding path program 25 times [2021-08-06 15:23:18,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:18,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705026466] [2021-08-06 15:23:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:18,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:18,841 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 15:23:18,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:18,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705026466] [2021-08-06 15:23:18,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705026466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:18,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157899440] [2021-08-06 15:23:18,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:23:18,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:18,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:18,842 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 15:23:18,843 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 15:23:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:19,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:19,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:19,449 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 15:23:19,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157899440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:19,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:19,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:23:19,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720432252] [2021-08-06 15:23:19,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:23:19,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:19,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:23:19,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:23:19,450 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:23:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:19,874 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-08-06 15:23:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:23:19,875 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-08-06 15:23:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:19,879 INFO L225 Difference]: With dead ends: 2335 [2021-08-06 15:23:19,879 INFO L226 Difference]: Without dead ends: 2335 [2021-08-06 15:23:19,880 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 277.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:23:19,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-08-06 15:23:19,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-08-06 15:23:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-06 15:23:19,907 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-06 15:23:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:19,907 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-06 15:23:19,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 15:23:19,907 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-06 15:23:19,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:19,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:19,909 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] [2021-08-06 15:23:19,937 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 15:23:20,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:20,125 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:20,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1422734772, now seen corresponding path program 26 times [2021-08-06 15:23:20,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:20,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468901266] [2021-08-06 15:23:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:20,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:20,189 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 15:23:20,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:20,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468901266] [2021-08-06 15:23:20,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468901266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:20,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825162098] [2021-08-06 15:23:20,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:23:20,190 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:20,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:20,191 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 15:23:20,220 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 15:23:20,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:23:20,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:20,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:20,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:20,834 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 15:23:20,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825162098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:20,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:20,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:23:20,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450670790] [2021-08-06 15:23:20,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:23:20,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:20,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:23:20,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:23:20,835 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:21,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:21,228 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-08-06 15:23:21,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:23:21,229 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:21,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:21,233 INFO L225 Difference]: With dead ends: 2285 [2021-08-06 15:23:21,233 INFO L226 Difference]: Without dead ends: 2285 [2021-08-06 15:23:21,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:23:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-08-06 15:23:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-08-06 15:23:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-06 15:23:21,254 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-06 15:23:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:21,255 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-06 15:23:21,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-06 15:23:21,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:21,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:21,257 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] [2021-08-06 15:23:21,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 15:23:21,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:21,467 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:21,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:21,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1341358684, now seen corresponding path program 27 times [2021-08-06 15:23:21,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:21,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082048409] [2021-08-06 15:23:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:21,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:21,515 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 15:23:21,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:21,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082048409] [2021-08-06 15:23:21,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082048409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:21,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65728642] [2021-08-06 15:23:21,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:23:21,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:21,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:21,530 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 15:23:21,551 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 15:23:21,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:23:21,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:21,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:21,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:22,130 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 15:23:22,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65728642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:22,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:22,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:23:22,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652672690] [2021-08-06 15:23:22,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:23:22,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:23:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:23:22,131 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:22,454 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-08-06 15:23:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:23:22,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:22,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:22,458 INFO L225 Difference]: With dead ends: 2176 [2021-08-06 15:23:22,458 INFO L226 Difference]: Without dead ends: 2172 [2021-08-06 15:23:22,459 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:23:22,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-08-06 15:23:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-08-06 15:23:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-06 15:23:22,481 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-06 15:23:22,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:22,481 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-06 15:23:22,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-06 15:23:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:22,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:22,483 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] [2021-08-06 15:23:22,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 15:23:22,696 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,SelfDestructingSolverStorable32 [2021-08-06 15:23:22,697 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:22,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:22,697 INFO L82 PathProgramCache]: Analyzing trace with hash -410701468, now seen corresponding path program 28 times [2021-08-06 15:23:22,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:22,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652312072] [2021-08-06 15:23:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:22,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:22,747 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 15:23:22,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:22,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652312072] [2021-08-06 15:23:22,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652312072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:22,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806869761] [2021-08-06 15:23:22,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:23:22,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:22,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:22,748 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 15:23:22,749 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 15:23:23,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:23:23,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:23,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:23,366 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 15:23:23,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806869761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:23,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:23,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:23:23,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76933242] [2021-08-06 15:23:23,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:23:23,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:23,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:23:23,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:23:23,367 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:23:23,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:23,725 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-08-06 15:23:23,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:23:23,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-06 15:23:23,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:23,729 INFO L225 Difference]: With dead ends: 2199 [2021-08-06 15:23:23,729 INFO L226 Difference]: Without dead ends: 2199 [2021-08-06 15:23:23,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:23:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-08-06 15:23:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-08-06 15:23:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-08-06 15:23:23,750 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-08-06 15:23:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:23,750 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-08-06 15:23:23,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:23:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-08-06 15:23:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:23,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:23,752 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] [2021-08-06 15:23:23,770 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 15:23:23,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:23,956 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1232337686, now seen corresponding path program 29 times [2021-08-06 15:23:23,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:23,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166693633] [2021-08-06 15:23:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:23,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:24,025 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 15:23:24,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:24,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166693633] [2021-08-06 15:23:24,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166693633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:24,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715245878] [2021-08-06 15:23:24,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:23:24,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:24,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:24,026 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 15:23:24,053 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 15:23:24,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:23:24,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:24,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:24,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:24,705 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 15:23:24,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715245878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:24,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:24,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:23:24,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111030602] [2021-08-06 15:23:24,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:23:24,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:23:24,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:23:24,706 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:23:25,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:25,060 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-08-06 15:23:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:23:25,061 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-06 15:23:25,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:25,065 INFO L225 Difference]: With dead ends: 2156 [2021-08-06 15:23:25,065 INFO L226 Difference]: Without dead ends: 2152 [2021-08-06 15:23:25,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:23:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-08-06 15:23:25,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-08-06 15:23:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-08-06 15:23:25,094 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-08-06 15:23:25,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:25,094 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-08-06 15:23:25,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:23:25,094 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-08-06 15:23:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:25,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:25,096 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] [2021-08-06 15:23:25,123 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 15:23:25,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:25,313 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2059201626, now seen corresponding path program 30 times [2021-08-06 15:23:25,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:25,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328060475] [2021-08-06 15:23:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:25,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:25,369 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 15:23:25,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:25,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328060475] [2021-08-06 15:23:25,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328060475] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:25,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751863909] [2021-08-06 15:23:25,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:23:25,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:25,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:25,370 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 15:23:25,371 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 15:23:25,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:23:25,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:25,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:25,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:25,982 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 15:23:25,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751863909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:25,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:25,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:23:25,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559295249] [2021-08-06 15:23:25,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:23:25,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:25,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:23:25,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:23:25,983 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:26,312 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-08-06 15:23:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:23:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:26,315 INFO L225 Difference]: With dead ends: 2097 [2021-08-06 15:23:26,316 INFO L226 Difference]: Without dead ends: 2097 [2021-08-06 15:23:26,316 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:23:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-08-06 15:23:26,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-08-06 15:23:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-08-06 15:23:26,341 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-08-06 15:23:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:26,341 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-08-06 15:23:26,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:26,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-08-06 15:23:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:26,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:26,344 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] [2021-08-06 15:23:26,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 15:23:26,556 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,SelfDestructingSolverStorable35 [2021-08-06 15:23:26,557 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:26,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:26,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1977825538, now seen corresponding path program 31 times [2021-08-06 15:23:26,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:26,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790368478] [2021-08-06 15:23:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:26,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:26,611 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 15:23:26,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:26,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790368478] [2021-08-06 15:23:26,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790368478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:26,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887577702] [2021-08-06 15:23:26,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:23:26,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:26,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:26,622 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 15:23:26,632 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 15:23:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:27,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:27,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:27,249 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 15:23:27,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887577702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:27,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:27,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:23:27,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562115268] [2021-08-06 15:23:27,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:23:27,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:27,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:23:27,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:23:27,251 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:27,505 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-08-06 15:23:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:23:27,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:27,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:27,508 INFO L225 Difference]: With dead ends: 1963 [2021-08-06 15:23:27,508 INFO L226 Difference]: Without dead ends: 1959 [2021-08-06 15:23:27,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:23:27,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-08-06 15:23:27,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-08-06 15:23:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:27,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-08-06 15:23:27,533 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-08-06 15:23:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:27,533 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-08-06 15:23:27,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:27,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-08-06 15:23:27,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:27,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:27,536 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] [2021-08-06 15:23:27,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 15:23:27,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 15:23:27,753 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:27,753 INFO L82 PathProgramCache]: Analyzing trace with hash 802049786, now seen corresponding path program 32 times [2021-08-06 15:23:27,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:27,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501760213] [2021-08-06 15:23:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:27,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:27,800 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 15:23:27,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:27,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501760213] [2021-08-06 15:23:27,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501760213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:27,800 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74990532] [2021-08-06 15:23:27,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:23:27,800 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:27,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:27,801 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 15:23:27,802 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 15:23:28,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:23:28,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:28,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:28,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:28,430 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 15:23:28,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74990532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:28,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:28,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 15:23:28,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369454073] [2021-08-06 15:23:28,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:23:28,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:28,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:23:28,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:23:28,431 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:28,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:28,633 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-08-06 15:23:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:23:28,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:28,636 INFO L225 Difference]: With dead ends: 1728 [2021-08-06 15:23:28,636 INFO L226 Difference]: Without dead ends: 1716 [2021-08-06 15:23:28,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:23:28,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-08-06 15:23:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-08-06 15:23:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:28,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-08-06 15:23:28,667 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-08-06 15:23:28,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:28,667 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-08-06 15:23:28,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:28,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-08-06 15:23:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:28,670 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:28,670 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] [2021-08-06 15:23:28,699 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 15:23:28,894 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,SelfDestructingSolverStorable37 [2021-08-06 15:23:28,894 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:28,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:28,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1895790794, now seen corresponding path program 33 times [2021-08-06 15:23:28,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:28,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808707998] [2021-08-06 15:23:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:28,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:28,945 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 15:23:28,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:28,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808707998] [2021-08-06 15:23:28,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808707998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:28,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755090208] [2021-08-06 15:23:28,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:23:28,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:28,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:28,955 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 15:23:28,955 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 15:23:29,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:23:29,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:29,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:29,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:29,624 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 15:23:29,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755090208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:29,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:29,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:23:29,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485441288] [2021-08-06 15:23:29,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:23:29,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:29,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:23:29,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:23:29,625 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:23:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:29,942 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-08-06 15:23:29,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:23:29,942 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-06 15:23:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:29,956 INFO L225 Difference]: With dead ends: 1821 [2021-08-06 15:23:29,956 INFO L226 Difference]: Without dead ends: 1821 [2021-08-06 15:23:29,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:23:29,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-08-06 15:23:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-08-06 15:23:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:29,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-08-06 15:23:29,981 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-08-06 15:23:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:29,981 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-08-06 15:23:29,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:23:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-08-06 15:23:29,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:29,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:29,983 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] [2021-08-06 15:23:30,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 15:23:30,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 15:23:30,197 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:30,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:30,197 INFO L82 PathProgramCache]: Analyzing trace with hash -252751640, now seen corresponding path program 34 times [2021-08-06 15:23:30,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:30,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746826552] [2021-08-06 15:23:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:30,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:30,246 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 15:23:30,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:30,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746826552] [2021-08-06 15:23:30,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746826552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:30,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658584331] [2021-08-06 15:23:30,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:23:30,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:30,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:30,247 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 15:23:30,247 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 15:23:30,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:23:30,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:30,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:30,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:30,900 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 15:23:30,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658584331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:30,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:30,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 15:23:30,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98860817] [2021-08-06 15:23:30,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:23:30,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:30,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:23:30,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:23:30,901 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:23:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:31,179 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-08-06 15:23:31,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:23:31,179 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-08-06 15:23:31,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:31,182 INFO L225 Difference]: With dead ends: 1790 [2021-08-06 15:23:31,182 INFO L226 Difference]: Without dead ends: 1786 [2021-08-06 15:23:31,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-08-06 15:23:31,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-08-06 15:23:31,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-08-06 15:23:31,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-08-06 15:23:31,204 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-08-06 15:23:31,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:31,204 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-08-06 15:23:31,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 15:23:31,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-08-06 15:23:31,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 15:23:31,207 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:31,207 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] [2021-08-06 15:23:31,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-06 15:23:31,420 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,SelfDestructingSolverStorable39 [2021-08-06 15:23:31,421 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:31,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:31,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1520208818, now seen corresponding path program 35 times [2021-08-06 15:23:31,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:31,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412030694] [2021-08-06 15:23:31,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:31,421 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:31,472 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 15:23:31,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:31,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412030694] [2021-08-06 15:23:31,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412030694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:31,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140682216] [2021-08-06 15:23:31,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:23:31,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:31,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:31,488 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 15:23:31,488 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 15:23:32,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:23:32,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:32,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 15:23:32,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:32,143 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 15:23:32,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140682216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:32,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:32,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 15:23:32,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309242054] [2021-08-06 15:23:32,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:23:32,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:32,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:23:32,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:23:32,144 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:32,310 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-08-06 15:23:32,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:23:32,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 15:23:32,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:32,313 INFO L225 Difference]: With dead ends: 1649 [2021-08-06 15:23:32,313 INFO L226 Difference]: Without dead ends: 1637 [2021-08-06 15:23:32,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:23:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-08-06 15:23:32,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-08-06 15:23:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-08-06 15:23:32,342 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-08-06 15:23:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:32,342 INFO L470 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-08-06 15:23:32,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-08-06 15:23:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:32,344 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:32,344 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] [2021-08-06 15:23:32,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 15:23:32,544 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,SelfDestructingSolverStorable40 [2021-08-06 15:23:32,544 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:32,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:32,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1154803164, now seen corresponding path program 4 times [2021-08-06 15:23:32,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:32,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912473995] [2021-08-06 15:23:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:32,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:33,772 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 15:23:33,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:33,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912473995] [2021-08-06 15:23:33,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912473995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:33,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560244253] [2021-08-06 15:23:33,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:23:33,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:33,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:33,773 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 15:23:33,774 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 15:23:34,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:23:34,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:34,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:23:34,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:35,549 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:23:35,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:23:35,916 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 15:23:35,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560244253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:35,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:35,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:23:35,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133588809] [2021-08-06 15:23:35,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:23:35,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:35,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:23:35,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:23:35,917 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:23:36,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:36,737 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-08-06 15:23:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:23:36,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:23:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:36,740 INFO L225 Difference]: With dead ends: 1517 [2021-08-06 15:23:36,740 INFO L226 Difference]: Without dead ends: 1502 [2021-08-06 15:23:36,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 905.4ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:23:36,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-08-06 15:23:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-08-06 15:23:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-08-06 15:23:36,758 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-08-06 15:23:36,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:36,758 INFO L470 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-08-06 15:23:36,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:23:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-08-06 15:23:36,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:36,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:36,761 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] [2021-08-06 15:23:36,803 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 15:23:36,976 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,SelfDestructingSolverStorable41 [2021-08-06 15:23:36,977 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:36,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:36,977 INFO L82 PathProgramCache]: Analyzing trace with hash -873594852, now seen corresponding path program 5 times [2021-08-06 15:23:36,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:36,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548905333] [2021-08-06 15:23:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:36,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:38,058 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 15:23:38,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:38,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548905333] [2021-08-06 15:23:38,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548905333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:38,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424781039] [2021-08-06 15:23:38,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:23:38,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:38,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:38,060 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 15:23:38,060 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 15:23:38,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:23:38,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:38,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:23:38,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:39,738 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:23:39,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:23:40,272 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 15:23:40,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424781039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:40,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:40,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:23:40,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866744608] [2021-08-06 15:23:40,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:23:40,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:40,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:23:40,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:23:40,274 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:23:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:41,023 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-08-06 15:23:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:23:41,023 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:23:41,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:41,026 INFO L225 Difference]: With dead ends: 1495 [2021-08-06 15:23:41,026 INFO L226 Difference]: Without dead ends: 1480 [2021-08-06 15:23:41,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 848.5ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:23:41,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-08-06 15:23:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-08-06 15:23:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-08-06 15:23:41,042 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-08-06 15:23:41,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:41,043 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-08-06 15:23:41,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:23:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-08-06 15:23:41,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:41,045 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:41,045 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] [2021-08-06 15:23:41,064 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 15:23:41,245 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,SelfDestructingSolverStorable42 [2021-08-06 15:23:41,246 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:41,246 INFO L82 PathProgramCache]: Analyzing trace with hash 717834456, now seen corresponding path program 36 times [2021-08-06 15:23:41,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:41,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555111036] [2021-08-06 15:23:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:41,246 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:42,206 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 15:23:42,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:42,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555111036] [2021-08-06 15:23:42,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555111036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:42,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810571545] [2021-08-06 15:23:42,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:23:42,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:42,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:42,207 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 15:23:42,208 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 15:23:42,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:23:42,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:42,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:23:42,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:44,046 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:23:44,046 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 116 treesize of output 82 [2021-08-06 15:23:44,223 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 15:23:44,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810571545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:44,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:44,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:23:44,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401882815] [2021-08-06 15:23:44,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:23:44,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:44,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:23:44,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:23:44,225 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:23:46,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:46,786 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-08-06 15:23:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:23:46,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 15:23:46,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:46,789 INFO L225 Difference]: With dead ends: 1650 [2021-08-06 15:23:46,789 INFO L226 Difference]: Without dead ends: 1635 [2021-08-06 15:23:46,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2481.7ms TimeCoverageRelationStatistics Valid=333, Invalid=1647, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:23:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-08-06 15:23:46,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-08-06 15:23:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-08-06 15:23:46,806 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-08-06 15:23:46,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:46,806 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-08-06 15:23:46,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:23:46,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-08-06 15:23:46,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:46,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:46,808 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] [2021-08-06 15:23:46,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 15:23:47,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:47,009 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:47,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1522881632, now seen corresponding path program 6 times [2021-08-06 15:23:47,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:47,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598748827] [2021-08-06 15:23:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:47,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:48,197 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 15:23:48,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:48,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598748827] [2021-08-06 15:23:48,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598748827] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:48,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448362130] [2021-08-06 15:23:48,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:23:48,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:48,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:48,199 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 15:23:48,199 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 15:23:49,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:23:49,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:23:49,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:23:49,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:49,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:23:49,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:23:49,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 15:23:50,708 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 15:23:50,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448362130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:50,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:50,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:23:50,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629277798] [2021-08-06 15:23:50,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:23:50,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:50,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:23:50,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:23:50,709 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:23:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:23:53,788 INFO L93 Difference]: Finished difference Result 1842 states and 5907 transitions. [2021-08-06 15:23:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:23:53,788 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 15:23:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:23:53,791 INFO L225 Difference]: With dead ends: 1842 [2021-08-06 15:23:53,791 INFO L226 Difference]: Without dead ends: 1827 [2021-08-06 15:23:53,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 2912.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:23:53,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2021-08-06 15:23:53,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1198. [2021-08-06 15:23:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:23:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-08-06 15:23:53,811 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-08-06 15:23:53,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:23:53,811 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-08-06 15:23:53,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:23:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-08-06 15:23:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:23:53,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:23:53,813 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] [2021-08-06 15:23:53,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 15:23:54,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:54,014 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:23:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:23:54,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1221704100, now seen corresponding path program 37 times [2021-08-06 15:23:54,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:23:54,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944098053] [2021-08-06 15:23:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:23:54,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:23:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:55,197 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 15:23:55,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:23:55,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944098053] [2021-08-06 15:23:55,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944098053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:55,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367025880] [2021-08-06 15:23:55,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:23:55,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:23:55,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:23:55,198 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 15:23:55,199 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 15:23:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:23:56,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:23:56,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:23:57,283 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:23:57,283 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 116 treesize of output 82 [2021-08-06 15:23:57,443 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 15:23:57,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367025880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:23:57,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:23:57,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:23:57,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803461410] [2021-08-06 15:23:57,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:23:57,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:23:57,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:23:57,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:23:57,444 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 15:24:00,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:00,906 INFO L93 Difference]: Finished difference Result 1869 states and 5964 transitions. [2021-08-06 15:24:00,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 15:24:00,906 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-08-06 15:24:00,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:00,909 INFO L225 Difference]: With dead ends: 1869 [2021-08-06 15:24:00,910 INFO L226 Difference]: Without dead ends: 1854 [2021-08-06 15:24:00,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 3298.9ms TimeCoverageRelationStatistics Valid=494, Invalid=2368, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:24:00,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-08-06 15:24:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1206. [2021-08-06 15:24:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:00,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-08-06 15:24:00,935 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-08-06 15:24:00,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:00,935 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-08-06 15:24:00,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 15:24:00,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-08-06 15:24:00,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:00,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:00,937 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] [2021-08-06 15:24:00,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 15:24:01,138 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,SelfDestructingSolverStorable45 [2021-08-06 15:24:01,138 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:01,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:01,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2096944352, now seen corresponding path program 38 times [2021-08-06 15:24:01,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:01,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254720734] [2021-08-06 15:24:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:01,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:01,708 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 15:24:01,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:01,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254720734] [2021-08-06 15:24:01,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254720734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:01,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182185551] [2021-08-06 15:24:01,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:24:01,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:01,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:01,709 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 15:24:01,711 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 15:24:02,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:24:02,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:02,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:24:02,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:03,865 INFO L354 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2021-08-06 15:24:03,865 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 112 treesize of output 110 [2021-08-06 15:24:06,560 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 15:24:06,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182185551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:06,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:06,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-08-06 15:24:06,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572992444] [2021-08-06 15:24:06,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 15:24:06,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:06,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 15:24:06,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:24:06,561 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 15:24:11,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:11,623 INFO L93 Difference]: Finished difference Result 2485 states and 7651 transitions. [2021-08-06 15:24:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 15:24:11,624 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:24:11,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:11,629 INFO L225 Difference]: With dead ends: 2485 [2021-08-06 15:24:11,629 INFO L226 Difference]: Without dead ends: 2440 [2021-08-06 15:24:11,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 4911.8ms TimeCoverageRelationStatistics Valid=686, Invalid=3604, Unknown=0, NotChecked=0, Total=4290 [2021-08-06 15:24:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-08-06 15:24:11,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1381. [2021-08-06 15:24:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-08-06 15:24:11,653 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-08-06 15:24:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:11,653 INFO L470 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-08-06 15:24:11,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 15:24:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-08-06 15:24:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:11,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:11,655 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] [2021-08-06 15:24:11,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 15:24:11,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 15:24:11,856 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:11,856 INFO L82 PathProgramCache]: Analyzing trace with hash 11877124, now seen corresponding path program 7 times [2021-08-06 15:24:11,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:11,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748649251] [2021-08-06 15:24:11,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:11,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:12,942 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 15:24:12,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:12,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748649251] [2021-08-06 15:24:12,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748649251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:12,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660429894] [2021-08-06 15:24:12,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:24:12,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:12,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:12,943 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 15:24:12,943 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 15:24:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:14,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:24:14,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:15,246 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:24:15,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:24:15,578 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 15:24:15,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660429894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:15,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:15,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:24:15,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236781448] [2021-08-06 15:24:15,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:24:15,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:15,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:24:15,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:24:15,579 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:24:16,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:16,490 INFO L93 Difference]: Finished difference Result 1786 states and 5800 transitions. [2021-08-06 15:24:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:24:16,491 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:24:16,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:16,494 INFO L225 Difference]: With dead ends: 1786 [2021-08-06 15:24:16,494 INFO L226 Difference]: Without dead ends: 1771 [2021-08-06 15:24:16,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1013.8ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:24:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2021-08-06 15:24:16,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1392. [2021-08-06 15:24:16,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.3163191948238677) internal successors, (4613), 1391 states have internal predecessors, (4613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:16,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4613 transitions. [2021-08-06 15:24:16,516 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4613 transitions. Word has length 26 [2021-08-06 15:24:16,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:16,516 INFO L470 AbstractCegarLoop]: Abstraction has 1392 states and 4613 transitions. [2021-08-06 15:24:16,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:24:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4613 transitions. [2021-08-06 15:24:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:16,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:16,519 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] [2021-08-06 15:24:16,543 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 15:24:16,732 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,SelfDestructingSolverStorable47 [2021-08-06 15:24:16,732 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:16,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:16,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2016520892, now seen corresponding path program 8 times [2021-08-06 15:24:16,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:16,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228501464] [2021-08-06 15:24:16,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:16,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:17,861 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 15:24:17,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:17,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228501464] [2021-08-06 15:24:17,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228501464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:17,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615502436] [2021-08-06 15:24:17,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:24:17,862 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:17,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:17,862 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 15:24:17,865 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 15:24:19,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:24:19,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:19,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:24:19,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:20,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:24:20,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 96 [2021-08-06 15:24:21,862 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 15:24:21,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615502436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:21,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:21,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-06 15:24:21,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396052296] [2021-08-06 15:24:21,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:24:21,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:21,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:24:21,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:24:21,863 INFO L87 Difference]: Start difference. First operand 1392 states and 4613 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 15:24:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:23,679 INFO L93 Difference]: Finished difference Result 1831 states and 5928 transitions. [2021-08-06 15:24:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:24:23,679 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 26 [2021-08-06 15:24:23,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:23,683 INFO L225 Difference]: With dead ends: 1831 [2021-08-06 15:24:23,683 INFO L226 Difference]: Without dead ends: 1816 [2021-08-06 15:24:23,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1799.5ms TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:24:23,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-08-06 15:24:23,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1395. [2021-08-06 15:24:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 3.317790530846485) internal successors, (4625), 1394 states have internal predecessors, (4625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 4625 transitions. [2021-08-06 15:24:23,703 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 4625 transitions. Word has length 26 [2021-08-06 15:24:23,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:23,703 INFO L470 AbstractCegarLoop]: Abstraction has 1395 states and 4625 transitions. [2021-08-06 15:24:23,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 15:24:23,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 4625 transitions. [2021-08-06 15:24:23,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:23,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:23,705 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] [2021-08-06 15:24:23,725 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 15:24:23,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:23,906 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:23,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:23,906 INFO L82 PathProgramCache]: Analyzing trace with hash 341036696, now seen corresponding path program 9 times [2021-08-06 15:24:23,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:23,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461471601] [2021-08-06 15:24:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:23,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:24,337 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 15:24:24,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:24,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461471601] [2021-08-06 15:24:24,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461471601] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:24,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769658052] [2021-08-06 15:24:24,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:24:24,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:24,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:24,338 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 15:24:24,339 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 15:24:25,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:24:25,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:25,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:24:25,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:27,017 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:24:27,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:24:27,332 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 15:24:27,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769658052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:27,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:27,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:24:27,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958498817] [2021-08-06 15:24:27,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:24:27,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:24:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:24:27,333 INFO L87 Difference]: Start difference. First operand 1395 states and 4625 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:24:28,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:28,688 INFO L93 Difference]: Finished difference Result 2032 states and 6569 transitions. [2021-08-06 15:24:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:24:28,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:24:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:28,692 INFO L225 Difference]: With dead ends: 2032 [2021-08-06 15:24:28,692 INFO L226 Difference]: Without dead ends: 2017 [2021-08-06 15:24:28,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1322.8ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:24:28,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-08-06 15:24:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1404. [2021-08-06 15:24:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.322166785459729) internal successors, (4661), 1403 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:28,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4661 transitions. [2021-08-06 15:24:28,714 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4661 transitions. Word has length 26 [2021-08-06 15:24:28,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:28,714 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4661 transitions. [2021-08-06 15:24:28,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:24:28,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4661 transitions. [2021-08-06 15:24:28,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:28,716 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:28,716 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] [2021-08-06 15:24:28,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-06 15:24:28,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 15:24:28,917 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:28,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:28,917 INFO L82 PathProgramCache]: Analyzing trace with hash 173227604, now seen corresponding path program 10 times [2021-08-06 15:24:28,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:28,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149223400] [2021-08-06 15:24:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:28,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:29,593 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 15:24:29,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:29,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149223400] [2021-08-06 15:24:29,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149223400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:29,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652276238] [2021-08-06 15:24:29,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:24:29,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:29,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:29,594 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 15:24:29,596 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 15:24:31,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:24:31,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:31,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:24:31,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:31,951 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:24:31,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:24:32,525 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 15:24:32,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652276238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:32,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:32,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:24:32,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793195629] [2021-08-06 15:24:32,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:24:32,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:32,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:24:32,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:24:32,526 INFO L87 Difference]: Start difference. First operand 1404 states and 4661 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:33,203 INFO L93 Difference]: Finished difference Result 1711 states and 5596 transitions. [2021-08-06 15:24:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:24:33,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:24:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:33,206 INFO L225 Difference]: With dead ends: 1711 [2021-08-06 15:24:33,207 INFO L226 Difference]: Without dead ends: 1696 [2021-08-06 15:24:33,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 751.2ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:24:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-08-06 15:24:33,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1404. [2021-08-06 15:24:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.322166785459729) internal successors, (4661), 1403 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4661 transitions. [2021-08-06 15:24:33,226 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4661 transitions. Word has length 26 [2021-08-06 15:24:33,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:33,226 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4661 transitions. [2021-08-06 15:24:33,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4661 transitions. [2021-08-06 15:24:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:33,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:33,228 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] [2021-08-06 15:24:33,249 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 15:24:33,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:33,429 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:33,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:33,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1894288424, now seen corresponding path program 11 times [2021-08-06 15:24:33,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:33,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192363487] [2021-08-06 15:24:33,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:33,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:34,307 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 15:24:34,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:34,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192363487] [2021-08-06 15:24:34,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192363487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:34,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101961013] [2021-08-06 15:24:34,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:24:34,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:34,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:34,308 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 15:24:34,310 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 15:24:35,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:24:35,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:24:35,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:36,634 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:24:36,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 15:24:37,703 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 15:24:37,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101961013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:37,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:37,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:24:37,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034788348] [2021-08-06 15:24:37,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:24:37,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:37,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:24:37,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:24:37,705 INFO L87 Difference]: Start difference. First operand 1404 states and 4661 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:24:40,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:40,178 INFO L93 Difference]: Finished difference Result 2335 states and 7497 transitions. [2021-08-06 15:24:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:24:40,178 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 15:24:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:40,183 INFO L225 Difference]: With dead ends: 2335 [2021-08-06 15:24:40,183 INFO L226 Difference]: Without dead ends: 2305 [2021-08-06 15:24:40,183 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2275.0ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:24:40,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-08-06 15:24:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1404. [2021-08-06 15:24:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.322166785459729) internal successors, (4661), 1403 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:40,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4661 transitions. [2021-08-06 15:24:40,211 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4661 transitions. Word has length 26 [2021-08-06 15:24:40,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:40,211 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4661 transitions. [2021-08-06 15:24:40,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:24:40,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4661 transitions. [2021-08-06 15:24:40,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:40,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:40,215 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] [2021-08-06 15:24:40,242 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 15:24:40,429 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,SelfDestructingSolverStorable51 [2021-08-06 15:24:40,429 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:40,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:40,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1903957512, now seen corresponding path program 12 times [2021-08-06 15:24:40,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:40,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012228038] [2021-08-06 15:24:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:40,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:41,241 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 15:24:41,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:41,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012228038] [2021-08-06 15:24:41,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012228038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:41,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953052499] [2021-08-06 15:24:41,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:24:41,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:41,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:41,242 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 15:24:41,243 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 15:24:42,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:24:42,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:42,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:24:42,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:24:43,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:24:43,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 15:24:44,752 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 15:24:44,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953052499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:44,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:44,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:24:44,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819440706] [2021-08-06 15:24:44,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:24:44,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:44,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:24:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:24:44,753 INFO L87 Difference]: Start difference. First operand 1404 states and 4661 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:24:48,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:48,241 INFO L93 Difference]: Finished difference Result 2049 states and 6657 transitions. [2021-08-06 15:24:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:24:48,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 15:24:48,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:48,245 INFO L225 Difference]: With dead ends: 2049 [2021-08-06 15:24:48,245 INFO L226 Difference]: Without dead ends: 2034 [2021-08-06 15:24:48,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 3274.0ms TimeCoverageRelationStatistics Valid=350, Invalid=1630, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:24:48,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-08-06 15:24:48,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1404. [2021-08-06 15:24:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 3.322166785459729) internal successors, (4661), 1403 states have internal predecessors, (4661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4661 transitions. [2021-08-06 15:24:48,268 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4661 transitions. Word has length 26 [2021-08-06 15:24:48,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:48,268 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 4661 transitions. [2021-08-06 15:24:48,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:24:48,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4661 transitions. [2021-08-06 15:24:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:48,271 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:48,271 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] [2021-08-06 15:24:48,293 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 15:24:48,471 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,SelfDestructingSolverStorable52 [2021-08-06 15:24:48,471 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:48,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:48,472 INFO L82 PathProgramCache]: Analyzing trace with hash -922276708, now seen corresponding path program 39 times [2021-08-06 15:24:48,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:48,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730826065] [2021-08-06 15:24:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:48,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:49,187 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 15:24:49,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:49,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730826065] [2021-08-06 15:24:49,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730826065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:49,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061250047] [2021-08-06 15:24:49,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:24:49,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:49,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:49,188 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 15:24:49,189 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 15:24:50,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:24:50,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:50,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:24:50,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:51,878 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:24:51,878 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 116 treesize of output 82 [2021-08-06 15:24:52,142 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 15:24:52,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061250047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:52,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:52,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:24:52,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798679400] [2021-08-06 15:24:52,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:24:52,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:52,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:24:52,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:24:52,143 INFO L87 Difference]: Start difference. First operand 1404 states and 4661 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 15:24:55,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:24:55,500 INFO L93 Difference]: Finished difference Result 2656 states and 8376 transitions. [2021-08-06 15:24:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:24:55,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-06 15:24:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:24:55,505 INFO L225 Difference]: With dead ends: 2656 [2021-08-06 15:24:55,505 INFO L226 Difference]: Without dead ends: 2626 [2021-08-06 15:24:55,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 3057.8ms TimeCoverageRelationStatistics Valid=446, Invalid=2416, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:24:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-08-06 15:24:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1409. [2021-08-06 15:24:55,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.327414772727273) internal successors, (4685), 1408 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:24:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4685 transitions. [2021-08-06 15:24:55,532 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4685 transitions. Word has length 26 [2021-08-06 15:24:55,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:24:55,532 INFO L470 AbstractCegarLoop]: Abstraction has 1409 states and 4685 transitions. [2021-08-06 15:24:55,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 15:24:55,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4685 transitions. [2021-08-06 15:24:55,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:24:55,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:24:55,534 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] [2021-08-06 15:24:55,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 15:24:55,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:55,735 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:24:55,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:24:55,735 INFO L82 PathProgramCache]: Analyzing trace with hash 280035660, now seen corresponding path program 40 times [2021-08-06 15:24:55,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:24:55,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085094879] [2021-08-06 15:24:55,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:24:55,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:24:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:24:56,551 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 15:24:56,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:24:56,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085094879] [2021-08-06 15:24:56,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085094879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:56,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318129962] [2021-08-06 15:24:56,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:24:56,552 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:24:56,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:24:56,553 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 15:24:56,571 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 15:24:58,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:24:58,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:24:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:24:58,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:24:59,261 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:24:59,262 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 116 treesize of output 82 [2021-08-06 15:24:59,547 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 15:24:59,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318129962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:24:59,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:24:59,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:24:59,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094800475] [2021-08-06 15:24:59,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:24:59,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:24:59,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:24:59,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:24:59,548 INFO L87 Difference]: Start difference. First operand 1409 states and 4685 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 15:25:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:03,059 INFO L93 Difference]: Finished difference Result 2864 states and 9044 transitions. [2021-08-06 15:25:03,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-06 15:25:03,060 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-06 15:25:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:03,065 INFO L225 Difference]: With dead ends: 2864 [2021-08-06 15:25:03,065 INFO L226 Difference]: Without dead ends: 2819 [2021-08-06 15:25:03,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 3313.3ms TimeCoverageRelationStatistics Valid=591, Invalid=2715, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 15:25:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2819 states. [2021-08-06 15:25:03,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2819 to 1426. [2021-08-06 15:25:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.343157894736842) internal successors, (4764), 1425 states have internal predecessors, (4764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:03,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4764 transitions. [2021-08-06 15:25:03,094 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4764 transitions. Word has length 26 [2021-08-06 15:25:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:03,094 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 4764 transitions. [2021-08-06 15:25:03,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 15:25:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4764 transitions. [2021-08-06 15:25:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:03,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:03,097 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] [2021-08-06 15:25:03,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 15:25:03,297 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,SelfDestructingSolverStorable54 [2021-08-06 15:25:03,298 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:03,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2113684312, now seen corresponding path program 41 times [2021-08-06 15:25:03,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:03,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686002150] [2021-08-06 15:25:03,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:03,298 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:03,944 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 15:25:03,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:03,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686002150] [2021-08-06 15:25:03,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686002150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:03,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536184478] [2021-08-06 15:25:03,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:25:03,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:03,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:03,953 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 15:25:03,954 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 15:25:05,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:25:05,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:05,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:25:05,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:06,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:25:06,704 INFO L354 Elim1Store]: treesize reduction 20, result has 60.8 percent of original size [2021-08-06 15:25:06,705 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 128 treesize of output 106 [2021-08-06 15:25:07,723 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 15:25:07,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536184478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:07,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:07,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:25:07,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703970533] [2021-08-06 15:25:07,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:25:07,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:07,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:25:07,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:25:07,727 INFO L87 Difference]: Start difference. First operand 1426 states and 4764 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 15:25:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:12,461 INFO L93 Difference]: Finished difference Result 3458 states and 10757 transitions. [2021-08-06 15:25:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 15:25:12,461 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-06 15:25:12,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:12,467 INFO L225 Difference]: With dead ends: 3458 [2021-08-06 15:25:12,467 INFO L226 Difference]: Without dead ends: 3398 [2021-08-06 15:25:12,467 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 4431.7ms TimeCoverageRelationStatistics Valid=812, Invalid=3348, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 15:25:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3398 states. [2021-08-06 15:25:12,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3398 to 1439. [2021-08-06 15:25:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 3.3546592489568847) internal successors, (4824), 1438 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:12,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 4824 transitions. [2021-08-06 15:25:12,496 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 4824 transitions. Word has length 26 [2021-08-06 15:25:12,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:12,496 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 4824 transitions. [2021-08-06 15:25:12,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 15:25:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 4824 transitions. [2021-08-06 15:25:12,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:12,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:12,498 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] [2021-08-06 15:25:12,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 15:25:12,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 15:25:12,699 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:12,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:12,699 INFO L82 PathProgramCache]: Analyzing trace with hash 270672448, now seen corresponding path program 13 times [2021-08-06 15:25:12,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:12,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490569454] [2021-08-06 15:25:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:12,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:13,424 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 15:25:13,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:13,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490569454] [2021-08-06 15:25:13,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490569454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:13,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887271635] [2021-08-06 15:25:13,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:25:13,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:13,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:13,425 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 15:25:13,426 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 15:25:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:15,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:25:15,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:16,600 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:25:16,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:25:16,942 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 15:25:16,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887271635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:16,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:16,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:25:16,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531519965] [2021-08-06 15:25:16,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:25:16,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:16,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:25:16,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:25:16,943 INFO L87 Difference]: Start difference. First operand 1439 states and 4824 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:25:17,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:17,691 INFO L93 Difference]: Finished difference Result 1831 states and 6013 transitions. [2021-08-06 15:25:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:25:17,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:25:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:17,695 INFO L225 Difference]: With dead ends: 1831 [2021-08-06 15:25:17,695 INFO L226 Difference]: Without dead ends: 1816 [2021-08-06 15:25:17,696 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 879.7ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:25:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-08-06 15:25:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1448. [2021-08-06 15:25:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.354526606772633) internal successors, (4854), 1447 states have internal predecessors, (4854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:17,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 4854 transitions. [2021-08-06 15:25:17,716 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 4854 transitions. Word has length 26 [2021-08-06 15:25:17,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:17,716 INFO L470 AbstractCegarLoop]: Abstraction has 1448 states and 4854 transitions. [2021-08-06 15:25:17,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:25:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 4854 transitions. [2021-08-06 15:25:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:17,719 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:17,719 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] [2021-08-06 15:25:17,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 15:25:17,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:17,920 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:17,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:17,920 INFO L82 PathProgramCache]: Analyzing trace with hash 599832020, now seen corresponding path program 14 times [2021-08-06 15:25:17,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:17,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34632868] [2021-08-06 15:25:17,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:17,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:18,449 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 15:25:18,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:18,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34632868] [2021-08-06 15:25:18,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34632868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:18,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862932392] [2021-08-06 15:25:18,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:25:18,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:18,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:18,454 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 15:25:18,455 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 15:25:20,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:25:20,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:20,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:25:20,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:21,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:25:21,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 96 [2021-08-06 15:25:23,002 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 15:25:23,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862932392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:23,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:23,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-06 15:25:23,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386438197] [2021-08-06 15:25:23,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:25:23,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:23,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:25:23,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:25:23,003 INFO L87 Difference]: Start difference. First operand 1448 states and 4854 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 15:25:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:25,108 INFO L93 Difference]: Finished difference Result 2021 states and 6563 transitions. [2021-08-06 15:25:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:25:25,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 26 [2021-08-06 15:25:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:25,112 INFO L225 Difference]: With dead ends: 2021 [2021-08-06 15:25:25,112 INFO L226 Difference]: Without dead ends: 2006 [2021-08-06 15:25:25,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1975.3ms TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:25:25,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2021-08-06 15:25:25,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1440. [2021-08-06 15:25:25,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.36275191104934) internal successors, (4839), 1439 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4839 transitions. [2021-08-06 15:25:25,142 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4839 transitions. Word has length 26 [2021-08-06 15:25:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:25,142 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 4839 transitions. [2021-08-06 15:25:25,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 15:25:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4839 transitions. [2021-08-06 15:25:25,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:25,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:25,145 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] [2021-08-06 15:25:25,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 15:25:25,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:25,361 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:25,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash 432022928, now seen corresponding path program 15 times [2021-08-06 15:25:25,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:25,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336356292] [2021-08-06 15:25:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:25,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:26,269 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 15:25:26,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:26,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336356292] [2021-08-06 15:25:26,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336356292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:26,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428287585] [2021-08-06 15:25:26,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:25:26,270 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:26,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:26,270 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 15:25:26,271 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 15:25:28,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:25:28,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:28,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:25:28,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:29,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:25:29,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 94 [2021-08-06 15:25:31,673 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 15:25:31,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428287585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:31,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:31,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 15:25:31,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839700374] [2021-08-06 15:25:31,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:25:31,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:25:31,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:25:31,674 INFO L87 Difference]: Start difference. First operand 1440 states and 4839 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:25:35,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:35,133 INFO L93 Difference]: Finished difference Result 2079 states and 6710 transitions. [2021-08-06 15:25:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:25:35,134 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 15:25:35,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:35,138 INFO L225 Difference]: With dead ends: 2079 [2021-08-06 15:25:35,138 INFO L226 Difference]: Without dead ends: 2064 [2021-08-06 15:25:35,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 3341.3ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:25:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-08-06 15:25:35,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1453. [2021-08-06 15:25:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.3677685950413223) internal successors, (4890), 1452 states have internal predecessors, (4890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:35,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4890 transitions. [2021-08-06 15:25:35,173 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4890 transitions. Word has length 26 [2021-08-06 15:25:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:35,173 INFO L470 AbstractCegarLoop]: Abstraction has 1453 states and 4890 transitions. [2021-08-06 15:25:35,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:25:35,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4890 transitions. [2021-08-06 15:25:35,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:35,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:35,176 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] [2021-08-06 15:25:35,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 15:25:35,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:35,377 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:35,378 INFO L82 PathProgramCache]: Analyzing trace with hash 412054902, now seen corresponding path program 16 times [2021-08-06 15:25:35,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:35,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545400881] [2021-08-06 15:25:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:35,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:36,520 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 15:25:36,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:36,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545400881] [2021-08-06 15:25:36,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545400881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:36,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534846834] [2021-08-06 15:25:36,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:25:36,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:36,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:36,521 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 15:25:36,523 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 15:25:38,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:25:38,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:38,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:25:38,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:39,475 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:25:39,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 15:25:40,584 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 15:25:40,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534846834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:40,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:40,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:25:40,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353815918] [2021-08-06 15:25:40,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:25:40,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:40,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:25:40,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:25:40,585 INFO L87 Difference]: Start difference. First operand 1453 states and 4890 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:41,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:41,293 INFO L93 Difference]: Finished difference Result 1934 states and 6346 transitions. [2021-08-06 15:25:41,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:25:41,294 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:25:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:41,297 INFO L225 Difference]: With dead ends: 1934 [2021-08-06 15:25:41,297 INFO L226 Difference]: Without dead ends: 1919 [2021-08-06 15:25:41,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 902.2ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:25:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-08-06 15:25:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1449. [2021-08-06 15:25:41,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.3625690607734806) internal successors, (4869), 1448 states have internal predecessors, (4869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:41,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4869 transitions. [2021-08-06 15:25:41,320 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4869 transitions. Word has length 26 [2021-08-06 15:25:41,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:41,320 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 4869 transitions. [2021-08-06 15:25:41,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4869 transitions. [2021-08-06 15:25:41,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:41,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:41,322 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] [2021-08-06 15:25:41,346 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 15:25:41,523 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,SelfDestructingSolverStorable59 [2021-08-06 15:25:41,523 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:41,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2132214460, now seen corresponding path program 17 times [2021-08-06 15:25:41,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:41,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082123655] [2021-08-06 15:25:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:41,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:42,583 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 15:25:42,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:42,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082123655] [2021-08-06 15:25:42,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082123655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:42,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392038628] [2021-08-06 15:25:42,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:25:42,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:42,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:42,586 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 15:25:42,589 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 15:25:45,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:25:45,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:45,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:25:45,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:46,139 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:25:46,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:25:46,604 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 15:25:46,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392038628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:46,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:46,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:25:46,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328944414] [2021-08-06 15:25:46,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:25:46,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:46,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:25:46,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:25:46,605 INFO L87 Difference]: Start difference. First operand 1449 states and 4869 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:25:48,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:48,392 INFO L93 Difference]: Finished difference Result 2052 states and 6704 transitions. [2021-08-06 15:25:48,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:25:48,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 15:25:48,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:48,396 INFO L225 Difference]: With dead ends: 2052 [2021-08-06 15:25:48,396 INFO L226 Difference]: Without dead ends: 2022 [2021-08-06 15:25:48,397 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1885.6ms TimeCoverageRelationStatistics Valid=247, Invalid=1235, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:25:48,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-08-06 15:25:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1452. [2021-08-06 15:25:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1451 states have (on average 3.363886974500345) internal successors, (4881), 1451 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 15:25:48,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4881 transitions. [2021-08-06 15:25:48,426 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4881 transitions. Word has length 26 [2021-08-06 15:25:48,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:48,426 INFO L470 AbstractCegarLoop]: Abstraction has 1452 states and 4881 transitions. [2021-08-06 15:25:48,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:25:48,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4881 transitions. [2021-08-06 15:25:48,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:48,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:48,429 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] [2021-08-06 15:25:48,457 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 15:25:48,640 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,SelfDestructingSolverStorable60 [2021-08-06 15:25:48,641 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:48,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:48,641 INFO L82 PathProgramCache]: Analyzing trace with hash 545220056, now seen corresponding path program 18 times [2021-08-06 15:25:48,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:48,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148378917] [2021-08-06 15:25:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:48,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:49,120 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 15:25:49,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:49,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148378917] [2021-08-06 15:25:49,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148378917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:49,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131001726] [2021-08-06 15:25:49,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:25:49,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:49,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:49,121 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 15:25:49,122 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 15:25:51,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:25:51,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:25:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:25:51,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:52,367 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:25:52,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 15:25:53,585 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 15:25:53,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131001726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:53,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:53,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:25:53,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81520546] [2021-08-06 15:25:53,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:25:53,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:53,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:25:53,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:25:53,586 INFO L87 Difference]: Start difference. First operand 1452 states and 4881 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:25:54,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:25:54,907 INFO L93 Difference]: Finished difference Result 1958 states and 6425 transitions. [2021-08-06 15:25:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:25:54,908 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:25:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:25:54,911 INFO L225 Difference]: With dead ends: 1958 [2021-08-06 15:25:54,911 INFO L226 Difference]: Without dead ends: 1943 [2021-08-06 15:25:54,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1375.6ms TimeCoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:25:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1943 states. [2021-08-06 15:25:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1943 to 1446. [2021-08-06 15:25:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.3612456747404846) internal successors, (4857), 1445 states have internal predecessors, (4857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:25:54,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4857 transitions. [2021-08-06 15:25:54,941 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4857 transitions. Word has length 26 [2021-08-06 15:25:54,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:25:54,941 INFO L470 AbstractCegarLoop]: Abstraction has 1446 states and 4857 transitions. [2021-08-06 15:25:54,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:25:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4857 transitions. [2021-08-06 15:25:54,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:25:54,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:25:54,945 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] [2021-08-06 15:25:54,981 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 15:25:55,160 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,SelfDestructingSolverStorable61 [2021-08-06 15:25:55,161 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:25:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:25:55,161 INFO L82 PathProgramCache]: Analyzing trace with hash 62339164, now seen corresponding path program 19 times [2021-08-06 15:25:55,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:25:55,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456955344] [2021-08-06 15:25:55,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:25:55,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:25:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:55,692 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 15:25:55,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:25:55,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456955344] [2021-08-06 15:25:55,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456955344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:55,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082884848] [2021-08-06 15:25:55,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:25:55,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:25:55,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:25:55,694 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 15:25:55,694 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 15:25:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:25:58,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:25:58,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:25:59,403 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:25:59,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:25:59,719 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 15:25:59,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082884848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:25:59,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:25:59,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:25:59,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121756183] [2021-08-06 15:25:59,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:25:59,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:25:59,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:25:59,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:25:59,721 INFO L87 Difference]: Start difference. First operand 1446 states and 4857 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:26:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:00,556 INFO L93 Difference]: Finished difference Result 1903 states and 6236 transitions. [2021-08-06 15:26:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:26:00,556 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:26:00,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:00,560 INFO L225 Difference]: With dead ends: 1903 [2021-08-06 15:26:00,560 INFO L226 Difference]: Without dead ends: 1882 [2021-08-06 15:26:00,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 846.5ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:26:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-08-06 15:26:00,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1487. [2021-08-06 15:26:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.357335127860027) internal successors, (4989), 1486 states have internal predecessors, (4989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:00,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4989 transitions. [2021-08-06 15:26:00,583 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4989 transitions. Word has length 26 [2021-08-06 15:26:00,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:00,583 INFO L470 AbstractCegarLoop]: Abstraction has 1487 states and 4989 transitions. [2021-08-06 15:26:00,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:26:00,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4989 transitions. [2021-08-06 15:26:00,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:00,585 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:00,585 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] [2021-08-06 15:26:00,610 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 15:26:00,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:00,786 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:00,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:00,786 INFO L82 PathProgramCache]: Analyzing trace with hash -105469928, now seen corresponding path program 20 times [2021-08-06 15:26:00,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:00,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518990536] [2021-08-06 15:26:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:00,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:01,375 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 15:26:01,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:01,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518990536] [2021-08-06 15:26:01,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518990536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:01,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131894761] [2021-08-06 15:26:01,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:26:01,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:01,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:01,376 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 15:26:01,377 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 15:26:04,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:26:04,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:04,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:26:04,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:04,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:26:04,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 94 [2021-08-06 15:26:06,874 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 15:26:06,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131894761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:06,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:06,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-08-06 15:26:06,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320327190] [2021-08-06 15:26:06,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:26:06,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:06,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:26:06,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:26:06,875 INFO L87 Difference]: Start difference. First operand 1487 states and 4989 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:26:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:09,147 INFO L93 Difference]: Finished difference Result 2084 states and 6671 transitions. [2021-08-06 15:26:09,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:26:09,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 15:26:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:09,151 INFO L225 Difference]: With dead ends: 2084 [2021-08-06 15:26:09,151 INFO L226 Difference]: Without dead ends: 2059 [2021-08-06 15:26:09,151 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 2315.3ms TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:26:09,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-08-06 15:26:09,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1501. [2021-08-06 15:26:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1500 states have (on average 3.366) internal successors, (5049), 1500 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 5049 transitions. [2021-08-06 15:26:09,175 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 5049 transitions. Word has length 26 [2021-08-06 15:26:09,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:09,175 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 5049 transitions. [2021-08-06 15:26:09,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:26:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 5049 transitions. [2021-08-06 15:26:09,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:09,178 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:09,178 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] [2021-08-06 15:26:09,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-06 15:26:09,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:09,380 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:09,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:09,380 INFO L82 PathProgramCache]: Analyzing trace with hash -125437954, now seen corresponding path program 21 times [2021-08-06 15:26:09,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:09,380 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847260897] [2021-08-06 15:26:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:09,380 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:09,786 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 15:26:09,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:09,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847260897] [2021-08-06 15:26:09,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847260897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:09,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742501055] [2021-08-06 15:26:09,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:26:09,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:09,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:09,796 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 15:26:09,797 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 15:26:12,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:26:12,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:12,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:26:12,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:13,334 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:26:13,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 15:26:14,487 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 15:26:14,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742501055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:14,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:14,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-06 15:26:14,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060830413] [2021-08-06 15:26:14,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:26:14,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:14,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:26:14,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:26:14,488 INFO L87 Difference]: Start difference. First operand 1501 states and 5049 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:26:16,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:16,011 INFO L93 Difference]: Finished difference Result 2000 states and 6554 transitions. [2021-08-06 15:26:16,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:26:16,012 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 15:26:16,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:16,016 INFO L225 Difference]: With dead ends: 2000 [2021-08-06 15:26:16,016 INFO L226 Difference]: Without dead ends: 1971 [2021-08-06 15:26:16,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1490.0ms TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:26:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-08-06 15:26:16,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1504. [2021-08-06 15:26:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 3.366600133067199) internal successors, (5060), 1503 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 5060 transitions. [2021-08-06 15:26:16,043 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 5060 transitions. Word has length 26 [2021-08-06 15:26:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:16,043 INFO L470 AbstractCegarLoop]: Abstraction has 1504 states and 5060 transitions. [2021-08-06 15:26:16,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:26:16,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 5060 transitions. [2021-08-06 15:26:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:16,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:16,046 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] [2021-08-06 15:26:16,071 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 15:26:16,248 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,SelfDestructingSolverStorable64 [2021-08-06 15:26:16,249 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:16,249 INFO L82 PathProgramCache]: Analyzing trace with hash 193303520, now seen corresponding path program 22 times [2021-08-06 15:26:16,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:16,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880220791] [2021-08-06 15:26:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:16,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:17,002 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 15:26:17,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:17,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880220791] [2021-08-06 15:26:17,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880220791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:17,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600359018] [2021-08-06 15:26:17,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:26:17,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:17,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:17,003 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 15:26:17,004 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 15:26:19,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:26:19,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:19,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:26:19,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:20,670 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:26:20,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 70 [2021-08-06 15:26:21,183 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 15:26:21,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600359018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:21,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:21,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:26:21,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446285610] [2021-08-06 15:26:21,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:26:21,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:21,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:26:21,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:26:21,184 INFO L87 Difference]: Start difference. First operand 1504 states and 5060 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:21,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:21,509 INFO L93 Difference]: Finished difference Result 1579 states and 5251 transitions. [2021-08-06 15:26:21,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 15:26:21,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:26:21,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:21,512 INFO L225 Difference]: With dead ends: 1579 [2021-08-06 15:26:21,512 INFO L226 Difference]: Without dead ends: 1564 [2021-08-06 15:26:21,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 398.7ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:26:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-08-06 15:26:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1510. [2021-08-06 15:26:21,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.3684559310801854) internal successors, (5083), 1509 states have internal predecessors, (5083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5083 transitions. [2021-08-06 15:26:21,532 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5083 transitions. Word has length 26 [2021-08-06 15:26:21,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:21,532 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 5083 transitions. [2021-08-06 15:26:21,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:21,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5083 transitions. [2021-08-06 15:26:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:21,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:21,534 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] [2021-08-06 15:26:21,561 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 15:26:21,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-06 15:26:21,735 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:21,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1764129120, now seen corresponding path program 23 times [2021-08-06 15:26:21,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:21,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269866674] [2021-08-06 15:26:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:21,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:22,348 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 15:26:22,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:22,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269866674] [2021-08-06 15:26:22,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269866674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:22,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110103556] [2021-08-06 15:26:22,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:26:22,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:22,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:22,349 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 15:26:22,376 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 15:26:25,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:26:25,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:25,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:26:25,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:25,995 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:26:25,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 77 [2021-08-06 15:26:27,108 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 15:26:27,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110103556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:27,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:27,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:26:27,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541446744] [2021-08-06 15:26:27,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:26:27,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:27,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:26:27,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:26:27,109 INFO L87 Difference]: Start difference. First operand 1510 states and 5083 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:26:27,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:27,953 INFO L93 Difference]: Finished difference Result 2020 states and 6633 transitions. [2021-08-06 15:26:27,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:26:27,953 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:26:27,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:27,957 INFO L225 Difference]: With dead ends: 2020 [2021-08-06 15:26:27,957 INFO L226 Difference]: Without dead ends: 1995 [2021-08-06 15:26:27,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 937.6ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:26:27,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-08-06 15:26:27,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1517. [2021-08-06 15:26:27,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3726912928759893) internal successors, (5113), 1516 states have internal predecessors, (5113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5113 transitions. [2021-08-06 15:26:27,977 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5113 transitions. Word has length 26 [2021-08-06 15:26:27,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:27,978 INFO L470 AbstractCegarLoop]: Abstraction has 1517 states and 5113 transitions. [2021-08-06 15:26:27,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:26:27,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5113 transitions. [2021-08-06 15:26:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:27,980 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:27,980 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] [2021-08-06 15:26:28,005 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 15:26:28,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:28,180 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:28,181 INFO L82 PathProgramCache]: Analyzing trace with hash -340731392, now seen corresponding path program 24 times [2021-08-06 15:26:28,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:28,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151415066] [2021-08-06 15:26:28,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:28,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:28,887 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 15:26:28,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:28,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151415066] [2021-08-06 15:26:28,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151415066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:28,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025135497] [2021-08-06 15:26:28,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:26:28,888 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:28,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:28,889 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 15:26:28,889 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 15:26:32,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:26:32,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:32,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:26:32,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:32,997 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:26:32,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:26:33,474 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 15:26:33,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025135497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:33,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:33,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:26:33,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485348448] [2021-08-06 15:26:33,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:26:33,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:33,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:26:33,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:26:33,475 INFO L87 Difference]: Start difference. First operand 1517 states and 5113 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:26:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:34,256 INFO L93 Difference]: Finished difference Result 1908 states and 6316 transitions. [2021-08-06 15:26:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:26:34,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:26:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:34,260 INFO L225 Difference]: With dead ends: 1908 [2021-08-06 15:26:34,260 INFO L226 Difference]: Without dead ends: 1893 [2021-08-06 15:26:34,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 890.6ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:26:34,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-08-06 15:26:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1528. [2021-08-06 15:26:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.372626064178127) internal successors, (5150), 1527 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 5150 transitions. [2021-08-06 15:26:34,280 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 5150 transitions. Word has length 26 [2021-08-06 15:26:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:34,280 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 5150 transitions. [2021-08-06 15:26:34,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:26:34,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 5150 transitions. [2021-08-06 15:26:34,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:34,282 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:34,282 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] [2021-08-06 15:26:34,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-06 15:26:34,483 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,SelfDestructingSolverStorable67 [2021-08-06 15:26:34,483 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:34,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:34,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1958264172, now seen corresponding path program 25 times [2021-08-06 15:26:34,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:34,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101597114] [2021-08-06 15:26:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:34,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:35,108 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 15:26:35,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:35,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101597114] [2021-08-06 15:26:35,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101597114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:35,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266639062] [2021-08-06 15:26:35,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:26:35,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:35,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:35,113 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 15:26:35,140 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 15:26:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:38,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:26:38,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:26:38,949 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:26:38,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 15:26:40,090 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 15:26:40,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266639062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:40,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:40,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:26:40,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603743377] [2021-08-06 15:26:40,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:26:40,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:40,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:26:40,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:26:40,091 INFO L87 Difference]: Start difference. First operand 1528 states and 5150 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:26:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:41,863 INFO L93 Difference]: Finished difference Result 2182 states and 7179 transitions. [2021-08-06 15:26:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:26:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 15:26:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:41,867 INFO L225 Difference]: With dead ends: 2182 [2021-08-06 15:26:41,867 INFO L226 Difference]: Without dead ends: 2163 [2021-08-06 15:26:41,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1754.2ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:26:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-08-06 15:26:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1529. [2021-08-06 15:26:41,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.3756544502617802) internal successors, (5158), 1528 states have internal predecessors, (5158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5158 transitions. [2021-08-06 15:26:41,892 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5158 transitions. Word has length 26 [2021-08-06 15:26:41,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:41,892 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 5158 transitions. [2021-08-06 15:26:41,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:26:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5158 transitions. [2021-08-06 15:26:41,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:41,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:41,895 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] [2021-08-06 15:26:41,922 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 15:26:42,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 15:26:42,095 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash 646760220, now seen corresponding path program 26 times [2021-08-06 15:26:42,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:42,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446298960] [2021-08-06 15:26:42,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:42,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:42,635 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 15:26:42,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:42,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446298960] [2021-08-06 15:26:42,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446298960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:42,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925277716] [2021-08-06 15:26:42,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:26:42,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:42,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:42,636 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 15:26:42,637 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 15:26:45,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:26:45,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:45,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:26:45,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:46,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:26:46,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:26:46,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2021-08-06 15:26:47,664 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 15:26:47,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925277716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:47,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:47,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:26:47,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910383042] [2021-08-06 15:26:47,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:26:47,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:47,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:26:47,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:26:47,665 INFO L87 Difference]: Start difference. First operand 1529 states and 5158 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:26:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:48,834 INFO L93 Difference]: Finished difference Result 2033 states and 6704 transitions. [2021-08-06 15:26:48,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:26:48,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 15:26:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:48,838 INFO L225 Difference]: With dead ends: 2033 [2021-08-06 15:26:48,838 INFO L226 Difference]: Without dead ends: 2008 [2021-08-06 15:26:48,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1191.1ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:26:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-08-06 15:26:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1535. [2021-08-06 15:26:48,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3741851368970015) internal successors, (5176), 1534 states have internal predecessors, (5176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:48,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5176 transitions. [2021-08-06 15:26:48,860 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5176 transitions. Word has length 26 [2021-08-06 15:26:48,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:48,860 INFO L470 AbstractCegarLoop]: Abstraction has 1535 states and 5176 transitions. [2021-08-06 15:26:48,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:26:48,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5176 transitions. [2021-08-06 15:26:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:48,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:48,862 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] [2021-08-06 15:26:48,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:49,062 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,SelfDestructingSolverStorable69 [2021-08-06 15:26:49,063 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:49,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:49,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2020528988, now seen corresponding path program 42 times [2021-08-06 15:26:49,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:49,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196947371] [2021-08-06 15:26:49,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:49,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:49,980 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 15:26:49,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:49,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196947371] [2021-08-06 15:26:49,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196947371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:49,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647229072] [2021-08-06 15:26:49,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:26:49,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:49,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:49,985 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 15:26:49,986 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 15:26:53,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:26:53,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:53,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:26:53,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:54,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:26:54,448 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 15:26:54,448 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 130 treesize of output 84 [2021-08-06 15:26:54,588 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 15:26:54,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647229072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:54,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:54,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:26:54,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860386009] [2021-08-06 15:26:54,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:26:54,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:54,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:26:54,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:26:54,589 INFO L87 Difference]: Start difference. First operand 1535 states and 5176 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 15:26:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:55,794 INFO L93 Difference]: Finished difference Result 1984 states and 6509 transitions. [2021-08-06 15:26:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:26:55,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-08-06 15:26:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:55,798 INFO L225 Difference]: With dead ends: 1984 [2021-08-06 15:26:55,798 INFO L226 Difference]: Without dead ends: 1958 [2021-08-06 15:26:55,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1188.0ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:26:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2021-08-06 15:26:55,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1539. [2021-08-06 15:26:55,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.3719115734720417) internal successors, (5186), 1538 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 5186 transitions. [2021-08-06 15:26:55,823 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 5186 transitions. Word has length 26 [2021-08-06 15:26:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:55,823 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 5186 transitions. [2021-08-06 15:26:55,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 15:26:55,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 5186 transitions. [2021-08-06 15:26:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:26:55,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:55,826 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] [2021-08-06 15:26:55,854 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 15:26:56,026 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,SelfDestructingSolverStorable70 [2021-08-06 15:26:56,026 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:56,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:56,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1206563744, now seen corresponding path program 43 times [2021-08-06 15:26:56,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:56,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394721199] [2021-08-06 15:26:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:56,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:56,826 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 15:26:56,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:56,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394721199] [2021-08-06 15:26:56,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394721199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:56,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667131789] [2021-08-06 15:26:56,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:26:56,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:56,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:56,828 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 15:26:56,828 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 15:27:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:00,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:27:00,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:01,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:27:01,067 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 15:27:01,068 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 128 treesize of output 84 [2021-08-06 15:27:01,289 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 15:27:01,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667131789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:01,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:01,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:27:01,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855456511] [2021-08-06 15:27:01,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:27:01,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:27:01,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:01,290 INFO L87 Difference]: Start difference. First operand 1539 states and 5186 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 15:27:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:03,084 INFO L93 Difference]: Finished difference Result 2159 states and 7085 transitions. [2021-08-06 15:27:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:27:03,085 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-08-06 15:27:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:03,089 INFO L225 Difference]: With dead ends: 2159 [2021-08-06 15:27:03,089 INFO L226 Difference]: Without dead ends: 2144 [2021-08-06 15:27:03,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1799.6ms TimeCoverageRelationStatistics Valid=441, Invalid=1815, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 15:27:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-08-06 15:27:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1539. [2021-08-06 15:27:03,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 3.3719115734720417) internal successors, (5186), 1538 states have internal predecessors, (5186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 5186 transitions. [2021-08-06 15:27:03,117 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 5186 transitions. Word has length 26 [2021-08-06 15:27:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:03,117 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 5186 transitions. [2021-08-06 15:27:03,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 15:27:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 5186 transitions. [2021-08-06 15:27:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:03,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:03,119 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] [2021-08-06 15:27:03,149 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 15:27:03,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:03,320 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:03,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1794939168, now seen corresponding path program 27 times [2021-08-06 15:27:03,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:03,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6961086] [2021-08-06 15:27:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:03,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:04,091 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 15:27:04,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:04,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6961086] [2021-08-06 15:27:04,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6961086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:04,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015566282] [2021-08-06 15:27:04,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:27:04,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:04,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:04,092 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 15:27:04,092 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 15:27:07,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:27:07,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:07,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:27:07,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:09,324 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 15:27:09,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 82 [2021-08-06 15:27:09,824 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 15:27:09,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015566282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:09,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:09,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:27:09,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655275656] [2021-08-06 15:27:09,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:27:09,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:09,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:27:09,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:09,825 INFO L87 Difference]: Start difference. First operand 1539 states and 5186 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:27:11,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:11,107 INFO L93 Difference]: Finished difference Result 2039 states and 6641 transitions. [2021-08-06 15:27:11,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:27:11,108 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:27:11,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:11,111 INFO L225 Difference]: With dead ends: 2039 [2021-08-06 15:27:11,111 INFO L226 Difference]: Without dead ends: 2024 [2021-08-06 15:27:11,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1241.0ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:27:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-08-06 15:27:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1550. [2021-08-06 15:27:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.3724983860555198) internal successors, (5224), 1549 states have internal predecessors, (5224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5224 transitions. [2021-08-06 15:27:11,133 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5224 transitions. Word has length 26 [2021-08-06 15:27:11,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:11,133 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5224 transitions. [2021-08-06 15:27:11,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:27:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5224 transitions. [2021-08-06 15:27:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:11,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:11,136 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] [2021-08-06 15:27:11,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 15:27:11,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:11,336 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:11,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash -244557604, now seen corresponding path program 44 times [2021-08-06 15:27:11,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:11,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574097554] [2021-08-06 15:27:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:11,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:12,122 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 15:27:12,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:12,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574097554] [2021-08-06 15:27:12,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574097554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:12,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570002150] [2021-08-06 15:27:12,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:27:12,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:12,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:12,124 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 15:27:12,125 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 15:27:15,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:27:15,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:15,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:27:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:17,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:27:17,031 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 15:27:17,031 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 130 treesize of output 84 [2021-08-06 15:27:17,176 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 15:27:17,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570002150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:17,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:17,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:27:17,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149513277] [2021-08-06 15:27:17,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:27:17,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:17,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:27:17,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:17,177 INFO L87 Difference]: Start difference. First operand 1550 states and 5224 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 15:27:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:19,720 INFO L93 Difference]: Finished difference Result 2182 states and 7048 transitions. [2021-08-06 15:27:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 15:27:19,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-08-06 15:27:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:19,724 INFO L225 Difference]: With dead ends: 2182 [2021-08-06 15:27:19,724 INFO L226 Difference]: Without dead ends: 2160 [2021-08-06 15:27:19,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2286.9ms TimeCoverageRelationStatistics Valid=418, Invalid=1934, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 15:27:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-08-06 15:27:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1557. [2021-08-06 15:27:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 3.3733933161953726) internal successors, (5249), 1556 states have internal predecessors, (5249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 5249 transitions. [2021-08-06 15:27:19,748 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 5249 transitions. Word has length 26 [2021-08-06 15:27:19,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:19,748 INFO L470 AbstractCegarLoop]: Abstraction has 1557 states and 5249 transitions. [2021-08-06 15:27:19,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 15:27:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 5249 transitions. [2021-08-06 15:27:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:19,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:19,750 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] [2021-08-06 15:27:19,779 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 15:27:19,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:19,953 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1220876448, now seen corresponding path program 45 times [2021-08-06 15:27:19,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:19,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751723208] [2021-08-06 15:27:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:19,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:20,519 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 15:27:20,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:20,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751723208] [2021-08-06 15:27:20,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751723208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:20,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222641265] [2021-08-06 15:27:20,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:27:20,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:20,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:20,520 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 15:27:20,521 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 15:27:24,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:27:24,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:24,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:27:24,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:25,188 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 15:27:25,189 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 118 treesize of output 102 [2021-08-06 15:27:26,401 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 15:27:26,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222641265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:26,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:26,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-06 15:27:26,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916780062] [2021-08-06 15:27:26,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:27:26,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:26,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:27:26,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:27:26,403 INFO L87 Difference]: Start difference. First operand 1557 states and 5249 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 15:27:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:29,207 INFO L93 Difference]: Finished difference Result 3030 states and 9621 transitions. [2021-08-06 15:27:29,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:27:29,207 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 26 [2021-08-06 15:27:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:29,212 INFO L225 Difference]: With dead ends: 3030 [2021-08-06 15:27:29,212 INFO L226 Difference]: Without dead ends: 3000 [2021-08-06 15:27:29,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 2458.5ms TimeCoverageRelationStatistics Valid=425, Invalid=2437, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 15:27:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-08-06 15:27:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 1601. [2021-08-06 15:27:29,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.369375) internal successors, (5391), 1600 states have internal predecessors, (5391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:29,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5391 transitions. [2021-08-06 15:27:29,243 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5391 transitions. Word has length 26 [2021-08-06 15:27:29,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:29,243 INFO L470 AbstractCegarLoop]: Abstraction has 1601 states and 5391 transitions. [2021-08-06 15:27:29,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 15:27:29,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5391 transitions. [2021-08-06 15:27:29,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:29,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:29,245 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] [2021-08-06 15:27:29,274 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 15:27:29,446 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,SelfDestructingSolverStorable74 [2021-08-06 15:27:29,446 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:29,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:29,446 INFO L82 PathProgramCache]: Analyzing trace with hash -205068792, now seen corresponding path program 28 times [2021-08-06 15:27:29,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:29,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33160045] [2021-08-06 15:27:29,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:29,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:30,024 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 15:27:30,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:30,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33160045] [2021-08-06 15:27:30,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33160045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:30,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374666515] [2021-08-06 15:27:30,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:27:30,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:30,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:30,025 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 15:27:30,025 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 15:27:33,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:27:33,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:33,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:27:33,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:34,937 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:27:34,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:27:35,391 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 15:27:35,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374666515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:35,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:35,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:27:35,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497804519] [2021-08-06 15:27:35,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:27:35,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:35,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:27:35,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:35,392 INFO L87 Difference]: Start difference. First operand 1601 states and 5391 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:27:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:37,170 INFO L93 Difference]: Finished difference Result 2155 states and 7007 transitions. [2021-08-06 15:27:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:27:37,170 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:27:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:37,174 INFO L225 Difference]: With dead ends: 2155 [2021-08-06 15:27:37,174 INFO L226 Difference]: Without dead ends: 2140 [2021-08-06 15:27:37,174 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1679.0ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:27:37,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-08-06 15:27:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1606. [2021-08-06 15:27:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 3.370716510903427) internal successors, (5410), 1605 states have internal predecessors, (5410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:37,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 5410 transitions. [2021-08-06 15:27:37,198 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 5410 transitions. Word has length 26 [2021-08-06 15:27:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:37,198 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 5410 transitions. [2021-08-06 15:27:37,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:27:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 5410 transitions. [2021-08-06 15:27:37,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:37,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:37,200 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:37,229 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 15:27:37,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:37,401 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:37,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:37,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1822601572, now seen corresponding path program 29 times [2021-08-06 15:27:37,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:37,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243601627] [2021-08-06 15:27:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:37,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:37,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:37,967 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 15:27:37,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:37,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243601627] [2021-08-06 15:27:37,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243601627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:37,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430266838] [2021-08-06 15:27:37,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:27:37,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:37,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:37,968 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 15:27:37,968 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 15:27:41,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:27:41,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:41,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:27:41,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:42,624 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:27:42,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 15:27:43,800 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 15:27:43,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430266838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:43,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:43,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:27:43,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905673621] [2021-08-06 15:27:43,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:27:43,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:43,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:27:43,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:43,801 INFO L87 Difference]: Start difference. First operand 1606 states and 5410 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:27:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:46,000 INFO L93 Difference]: Finished difference Result 2307 states and 7462 transitions. [2021-08-06 15:27:46,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:27:46,000 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 15:27:46,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:46,004 INFO L225 Difference]: With dead ends: 2307 [2021-08-06 15:27:46,004 INFO L226 Difference]: Without dead ends: 2288 [2021-08-06 15:27:46,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 2037.5ms TimeCoverageRelationStatistics Valid=333, Invalid=1307, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:27:46,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2021-08-06 15:27:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 1599. [2021-08-06 15:27:46,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.3692115143929913) internal successors, (5384), 1598 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:46,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5384 transitions. [2021-08-06 15:27:46,029 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5384 transitions. Word has length 26 [2021-08-06 15:27:46,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:46,030 INFO L470 AbstractCegarLoop]: Abstraction has 1599 states and 5384 transitions. [2021-08-06 15:27:46,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:27:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5384 transitions. [2021-08-06 15:27:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:46,032 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:46,032 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] [2021-08-06 15:27:46,061 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 15:27:46,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:46,232 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash -18564080, now seen corresponding path program 46 times [2021-08-06 15:27:46,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:46,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20993937] [2021-08-06 15:27:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:46,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:46,754 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 15:27:46,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:46,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20993937] [2021-08-06 15:27:46,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20993937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:46,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737599973] [2021-08-06 15:27:46,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:27:46,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:46,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:46,755 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 15:27:46,756 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 15:27:50,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:27:50,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:50,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:27:50,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:51,846 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-08-06 15:27:51,846 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 115 treesize of output 87 [2021-08-06 15:27:52,095 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 15:27:52,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737599973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:52,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:52,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:27:52,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190372063] [2021-08-06 15:27:52,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:27:52,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:27:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:52,096 INFO L87 Difference]: Start difference. First operand 1599 states and 5384 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 15:27:54,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:54,671 INFO L93 Difference]: Finished difference Result 3443 states and 10904 transitions. [2021-08-06 15:27:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:27:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-06 15:27:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:54,677 INFO L225 Difference]: With dead ends: 3443 [2021-08-06 15:27:54,678 INFO L226 Difference]: Without dead ends: 3407 [2021-08-06 15:27:54,678 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 2128.2ms TimeCoverageRelationStatistics Valid=490, Invalid=2266, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:27:54,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-08-06 15:27:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 1759. [2021-08-06 15:27:54,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1758 states have (on average 3.3924914675767917) internal successors, (5964), 1758 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 5964 transitions. [2021-08-06 15:27:54,710 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 5964 transitions. Word has length 26 [2021-08-06 15:27:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:54,710 INFO L470 AbstractCegarLoop]: Abstraction has 1759 states and 5964 transitions. [2021-08-06 15:27:54,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 15:27:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 5964 transitions. [2021-08-06 15:27:54,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:27:54,712 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:54,712 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] [2021-08-06 15:27:54,743 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 15:27:54,913 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,SelfDestructingSolverStorable77 [2021-08-06 15:27:54,913 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:54,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:54,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1815084572, now seen corresponding path program 47 times [2021-08-06 15:27:54,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:54,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339549886] [2021-08-06 15:27:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:54,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:55,385 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 15:27:55,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:55,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339549886] [2021-08-06 15:27:55,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339549886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:55,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002663938] [2021-08-06 15:27:55,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:27:55,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:55,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:55,386 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 15:27:55,387 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 15:27:59,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:27:59,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:59,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:27:59,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:00,199 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 15:28:00,199 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 116 treesize of output 100 [2021-08-06 15:28:01,223 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 15:28:01,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002663938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:01,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:01,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 15:28:01,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689165581] [2021-08-06 15:28:01,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:28:01,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:01,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:28:01,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:28:01,224 INFO L87 Difference]: Start difference. First operand 1759 states and 5964 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 15:28:04,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:04,043 INFO L93 Difference]: Finished difference Result 3831 states and 12201 transitions. [2021-08-06 15:28:04,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-06 15:28:04,043 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-06 15:28:04,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:04,050 INFO L225 Difference]: With dead ends: 3831 [2021-08-06 15:28:04,050 INFO L226 Difference]: Without dead ends: 3774 [2021-08-06 15:28:04,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 2515.0ms TimeCoverageRelationStatistics Valid=625, Invalid=2567, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:28:04,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-08-06 15:28:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 1858. [2021-08-06 15:28:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.416262789445342) internal successors, (6344), 1857 states have internal predecessors, (6344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6344 transitions. [2021-08-06 15:28:04,084 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6344 transitions. Word has length 26 [2021-08-06 15:28:04,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:04,084 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6344 transitions. [2021-08-06 15:28:04,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 15:28:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6344 transitions. [2021-08-06 15:28:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:04,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:04,087 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] [2021-08-06 15:28:04,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 15:28:04,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-06 15:28:04,287 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:04,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:04,288 INFO L82 PathProgramCache]: Analyzing trace with hash -629380028, now seen corresponding path program 30 times [2021-08-06 15:28:04,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:04,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950658421] [2021-08-06 15:28:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:04,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:04,984 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 15:28:04,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:04,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950658421] [2021-08-06 15:28:04,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950658421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:04,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351728189] [2021-08-06 15:28:04,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:28:04,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:04,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:04,985 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 15:28:04,986 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 15:28:09,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:28:09,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:09,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:28:09,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:10,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:28:10,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 96 [2021-08-06 15:28:12,064 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 15:28:12,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351728189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:12,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:12,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-06 15:28:12,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295280459] [2021-08-06 15:28:12,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:28:12,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:12,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:28:12,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:28:12,065 INFO L87 Difference]: Start difference. First operand 1858 states and 6344 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 15:28:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:14,422 INFO L93 Difference]: Finished difference Result 2493 states and 8287 transitions. [2021-08-06 15:28:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:28:14,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 26 [2021-08-06 15:28:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:14,427 INFO L225 Difference]: With dead ends: 2493 [2021-08-06 15:28:14,427 INFO L226 Difference]: Without dead ends: 2463 [2021-08-06 15:28:14,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 2127.3ms TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:28:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-08-06 15:28:14,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1870. [2021-08-06 15:28:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.41466024612092) internal successors, (6382), 1869 states have internal predecessors, (6382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6382 transitions. [2021-08-06 15:28:14,455 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6382 transitions. Word has length 26 [2021-08-06 15:28:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:14,455 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 6382 transitions. [2021-08-06 15:28:14,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 15:28:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6382 transitions. [2021-08-06 15:28:14,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:14,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:14,458 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] [2021-08-06 15:28:14,488 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 15:28:14,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:14,659 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:14,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:14,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2048054488, now seen corresponding path program 31 times [2021-08-06 15:28:14,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:14,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098802587] [2021-08-06 15:28:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:14,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:15,226 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 15:28:15,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:15,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098802587] [2021-08-06 15:28:15,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098802587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:15,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048175243] [2021-08-06 15:28:15,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:28:15,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:15,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:15,228 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 15:28:15,229 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 15:28:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:19,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:28:19,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:20,228 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:28:20,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 15:28:21,526 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 15:28:21,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048175243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:21,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:21,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:28:21,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138792347] [2021-08-06 15:28:21,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:28:21,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:28:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:21,527 INFO L87 Difference]: Start difference. First operand 1870 states and 6382 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:28:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:23,548 INFO L93 Difference]: Finished difference Result 2624 states and 8744 transitions. [2021-08-06 15:28:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:28:23,548 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:28:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:23,553 INFO L225 Difference]: With dead ends: 2624 [2021-08-06 15:28:23,553 INFO L226 Difference]: Without dead ends: 2605 [2021-08-06 15:28:23,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1871.8ms TimeCoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:28:23,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-08-06 15:28:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1870. [2021-08-06 15:28:23,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.41466024612092) internal successors, (6382), 1869 states have internal predecessors, (6382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6382 transitions. [2021-08-06 15:28:23,583 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6382 transitions. Word has length 26 [2021-08-06 15:28:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:23,583 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 6382 transitions. [2021-08-06 15:28:23,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:28:23,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6382 transitions. [2021-08-06 15:28:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:23,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:23,586 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] [2021-08-06 15:28:23,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 15:28:23,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:23,786 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:23,787 INFO L82 PathProgramCache]: Analyzing trace with hash 358111584, now seen corresponding path program 32 times [2021-08-06 15:28:23,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:23,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353706370] [2021-08-06 15:28:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:23,787 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:24,198 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 15:28:24,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:24,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353706370] [2021-08-06 15:28:24,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353706370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:24,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888942990] [2021-08-06 15:28:24,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:28:24,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:24,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:24,201 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 15:28:24,228 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 15:28:28,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:28:28,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:28,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:28:28,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:29,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:28:29,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 87 [2021-08-06 15:28:31,986 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 15:28:31,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888942990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:31,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:31,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-06 15:28:31,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875683618] [2021-08-06 15:28:31,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:28:31,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:31,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:28:31,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:28:31,987 INFO L87 Difference]: Start difference. First operand 1870 states and 6382 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 15:28:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:34,366 INFO L93 Difference]: Finished difference Result 2612 states and 8652 transitions. [2021-08-06 15:28:34,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:28:34,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 26 [2021-08-06 15:28:34,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:34,371 INFO L225 Difference]: With dead ends: 2612 [2021-08-06 15:28:34,371 INFO L226 Difference]: Without dead ends: 2562 [2021-08-06 15:28:34,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2044.9ms TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:28:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-08-06 15:28:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1858. [2021-08-06 15:28:34,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.4141087775982766) internal successors, (6340), 1857 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6340 transitions. [2021-08-06 15:28:34,397 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6340 transitions. Word has length 26 [2021-08-06 15:28:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:34,397 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6340 transitions. [2021-08-06 15:28:34,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 15:28:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6340 transitions. [2021-08-06 15:28:34,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:34,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:34,401 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] [2021-08-06 15:28:34,432 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 15:28:34,606 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,SelfDestructingSolverStorable81 [2021-08-06 15:28:34,606 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:34,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1039087114, now seen corresponding path program 48 times [2021-08-06 15:28:34,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:34,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105715403] [2021-08-06 15:28:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:34,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:35,494 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 15:28:35,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:35,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105715403] [2021-08-06 15:28:35,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105715403] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:35,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809797834] [2021-08-06 15:28:35,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:28:35,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:35,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:35,496 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 15:28:35,497 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 15:28:40,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:28:40,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:40,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:28:40,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:41,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:28:41,098 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 15:28:41,098 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 130 treesize of output 84 [2021-08-06 15:28:41,264 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 15:28:41,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809797834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:41,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:41,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:28:41,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562614715] [2021-08-06 15:28:41,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:28:41,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:41,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:28:41,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:28:41,265 INFO L87 Difference]: Start difference. First operand 1858 states and 6340 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 15:28:43,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:43,132 INFO L93 Difference]: Finished difference Result 2345 states and 7778 transitions. [2021-08-06 15:28:43,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:28:43,133 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-08-06 15:28:43,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:43,137 INFO L225 Difference]: With dead ends: 2345 [2021-08-06 15:28:43,137 INFO L226 Difference]: Without dead ends: 2323 [2021-08-06 15:28:43,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1977.6ms TimeCoverageRelationStatistics Valid=359, Invalid=1533, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:28:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-08-06 15:28:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1854. [2021-08-06 15:28:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 3.4128440366972477) internal successors, (6324), 1853 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 6324 transitions. [2021-08-06 15:28:43,163 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 6324 transitions. Word has length 26 [2021-08-06 15:28:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:43,163 INFO L470 AbstractCegarLoop]: Abstraction has 1854 states and 6324 transitions. [2021-08-06 15:28:43,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 15:28:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 6324 transitions. [2021-08-06 15:28:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:43,166 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:43,166 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] [2021-08-06 15:28:43,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 15:28:43,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:43,367 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:43,367 INFO L82 PathProgramCache]: Analyzing trace with hash -113593248, now seen corresponding path program 49 times [2021-08-06 15:28:43,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:43,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864302287] [2021-08-06 15:28:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:43,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:44,011 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 15:28:44,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:44,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864302287] [2021-08-06 15:28:44,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864302287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:44,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468536389] [2021-08-06 15:28:44,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:28:44,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:44,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:44,013 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 15:28:44,043 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 15:28:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:48,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:28:48,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:49,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:28:49,558 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 15:28:49,558 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 128 treesize of output 84 [2021-08-06 15:28:49,802 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 15:28:49,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468536389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:49,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:49,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-06 15:28:49,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938592593] [2021-08-06 15:28:49,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:28:49,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:49,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:28:49,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:28:49,803 INFO L87 Difference]: Start difference. First operand 1854 states and 6324 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 15:28:52,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:52,277 INFO L93 Difference]: Finished difference Result 2540 states and 8417 transitions. [2021-08-06 15:28:52,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:28:52,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 26 [2021-08-06 15:28:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:52,282 INFO L225 Difference]: With dead ends: 2540 [2021-08-06 15:28:52,282 INFO L226 Difference]: Without dead ends: 2525 [2021-08-06 15:28:52,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2188.1ms TimeCoverageRelationStatistics Valid=534, Invalid=2222, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 15:28:52,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2021-08-06 15:28:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 1854. [2021-08-06 15:28:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 3.4128440366972477) internal successors, (6324), 1853 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 6324 transitions. [2021-08-06 15:28:52,310 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 6324 transitions. Word has length 26 [2021-08-06 15:28:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:52,310 INFO L470 AbstractCegarLoop]: Abstraction has 1854 states and 6324 transitions. [2021-08-06 15:28:52,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 15:28:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 6324 transitions. [2021-08-06 15:28:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:28:52,313 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:52,313 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] [2021-08-06 15:28:52,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 15:28:52,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:52,517 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:52,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:52,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1291497788, now seen corresponding path program 50 times [2021-08-06 15:28:52,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:52,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596720305] [2021-08-06 15:28:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:52,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:53,200 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 15:28:53,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:53,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596720305] [2021-08-06 15:28:53,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596720305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:53,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980698460] [2021-08-06 15:28:53,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:28:53,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:53,201 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 15:28:53,202 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 15:28:57,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:28:57,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:57,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 15:28:57,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:58,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:28:58,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:28:58,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 110 treesize of output 106 [2021-08-06 15:29:00,154 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 15:29:00,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980698460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:00,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:00,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-06 15:29:00,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189682002] [2021-08-06 15:29:00,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:29:00,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:00,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:29:00,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:29:00,155 INFO L87 Difference]: Start difference. First operand 1854 states and 6324 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 15:29:07,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:07,847 INFO L93 Difference]: Finished difference Result 3419 states and 11025 transitions. [2021-08-06 15:29:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-06 15:29:07,848 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 26 [2021-08-06 15:29:07,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:07,854 INFO L225 Difference]: With dead ends: 3419 [2021-08-06 15:29:07,854 INFO L226 Difference]: Without dead ends: 3372 [2021-08-06 15:29:07,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2868 ImplicationChecksByTransitivity, 6849.0ms TimeCoverageRelationStatistics Valid=1246, Invalid=7310, Unknown=0, NotChecked=0, Total=8556 [2021-08-06 15:29:07,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2021-08-06 15:29:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 1926. [2021-08-06 15:29:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.410909090909091) internal successors, (6566), 1925 states have internal predecessors, (6566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 6566 transitions. [2021-08-06 15:29:07,889 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 6566 transitions. Word has length 26 [2021-08-06 15:29:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:07,889 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 6566 transitions. [2021-08-06 15:29:07,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 15:29:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 6566 transitions. [2021-08-06 15:29:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:07,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:07,892 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] [2021-08-06 15:29:07,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 15:29:08,092 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,SelfDestructingSolverStorable84 [2021-08-06 15:29:08,093 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:08,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:08,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1457232352, now seen corresponding path program 51 times [2021-08-06 15:29:08,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:08,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267972518] [2021-08-06 15:29:08,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:08,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:08,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:08,860 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 15:29:08,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:08,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267972518] [2021-08-06 15:29:08,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267972518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:08,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414166579] [2021-08-06 15:29:08,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:29:08,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:08,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:08,861 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 15:29:08,862 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 15:29:13,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:29:13,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:13,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:29:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:14,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:29:14,489 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 112 treesize of output 118 [2021-08-06 15:29:19,642 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 15:29:19,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414166579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:19,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:19,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 15:29:19,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250822250] [2021-08-06 15:29:19,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 15:29:19,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:19,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 15:29:19,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:29:19,643 INFO L87 Difference]: Start difference. First operand 1926 states and 6566 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 15:29:25,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:25,125 INFO L93 Difference]: Finished difference Result 3265 states and 10593 transitions. [2021-08-06 15:29:25,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:29:25,128 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 26 [2021-08-06 15:29:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:25,134 INFO L225 Difference]: With dead ends: 3265 [2021-08-06 15:29:25,134 INFO L226 Difference]: Without dead ends: 3220 [2021-08-06 15:29:25,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 5234.9ms TimeCoverageRelationStatistics Valid=631, Invalid=2909, Unknown=0, NotChecked=0, Total=3540 [2021-08-06 15:29:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-08-06 15:29:25,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 1939. [2021-08-06 15:29:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.415892672858617) internal successors, (6620), 1938 states have internal predecessors, (6620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6620 transitions. [2021-08-06 15:29:25,167 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6620 transitions. Word has length 26 [2021-08-06 15:29:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:25,167 INFO L470 AbstractCegarLoop]: Abstraction has 1939 states and 6620 transitions. [2021-08-06 15:29:25,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 15:29:25,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6620 transitions. [2021-08-06 15:29:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:25,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:25,171 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:25,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:25,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:25,371 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:25,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:25,371 INFO L82 PathProgramCache]: Analyzing trace with hash -327621864, now seen corresponding path program 52 times [2021-08-06 15:29:25,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:25,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930345805] [2021-08-06 15:29:25,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:25,372 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:26,259 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 15:29:26,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:26,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930345805] [2021-08-06 15:29:26,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930345805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:26,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227769074] [2021-08-06 15:29:26,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:29:26,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:26,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:26,265 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 15:29:26,278 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 15:29:31,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:29:31,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:31,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:29:31,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:32,296 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:29:32,296 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 122 treesize of output 82 [2021-08-06 15:29:32,507 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 15:29:32,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227769074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:32,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:32,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:29:32,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770661044] [2021-08-06 15:29:32,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:29:32,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:32,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:29:32,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:29:32,508 INFO L87 Difference]: Start difference. First operand 1939 states and 6620 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:29:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:34,671 INFO L93 Difference]: Finished difference Result 2486 states and 8267 transitions. [2021-08-06 15:29:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:29:34,671 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 15:29:34,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:34,675 INFO L225 Difference]: With dead ends: 2486 [2021-08-06 15:29:34,675 INFO L226 Difference]: Without dead ends: 2471 [2021-08-06 15:29:34,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2042.2ms TimeCoverageRelationStatistics Valid=414, Invalid=1656, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:29:34,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-08-06 15:29:34,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1937. [2021-08-06 15:29:34,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.415805785123967) internal successors, (6613), 1936 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6613 transitions. [2021-08-06 15:29:34,703 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6613 transitions. Word has length 26 [2021-08-06 15:29:34,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:34,704 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 6613 transitions. [2021-08-06 15:29:34,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:29:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6613 transitions. [2021-08-06 15:29:34,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:34,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:34,706 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] [2021-08-06 15:29:34,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-06 15:29:34,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:34,907 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:34,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:34,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1371276116, now seen corresponding path program 53 times [2021-08-06 15:29:34,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:34,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390595801] [2021-08-06 15:29:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:34,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:35,474 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 15:29:35,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:35,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390595801] [2021-08-06 15:29:35,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390595801] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:35,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891956036] [2021-08-06 15:29:35,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:29:35,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:35,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:35,475 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 15:29:35,477 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 15:29:40,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:29:40,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:40,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:29:40,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:41,354 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 15:29:41,354 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 122 treesize of output 102 [2021-08-06 15:29:42,180 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 15:29:42,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891956036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:42,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:42,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-06 15:29:42,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032443098] [2021-08-06 15:29:42,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:29:42,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:42,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:29:42,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:29:42,181 INFO L87 Difference]: Start difference. First operand 1937 states and 6613 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 15:29:45,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:45,093 INFO L93 Difference]: Finished difference Result 2799 states and 9264 transitions. [2021-08-06 15:29:45,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:29:45,093 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 26 [2021-08-06 15:29:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:45,098 INFO L225 Difference]: With dead ends: 2799 [2021-08-06 15:29:45,098 INFO L226 Difference]: Without dead ends: 2769 [2021-08-06 15:29:45,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 2645.1ms TimeCoverageRelationStatistics Valid=544, Invalid=2536, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 15:29:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-08-06 15:29:45,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1942. [2021-08-06 15:29:45,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 3.4157650695517776) internal successors, (6630), 1941 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:45,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 6630 transitions. [2021-08-06 15:29:45,132 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 6630 transitions. Word has length 26 [2021-08-06 15:29:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:45,132 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 6630 transitions. [2021-08-06 15:29:45,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 15:29:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 6630 transitions. [2021-08-06 15:29:45,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:45,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:45,135 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] [2021-08-06 15:29:45,167 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 15:29:45,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 15:29:45,337 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:45,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash -432990708, now seen corresponding path program 54 times [2021-08-06 15:29:45,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:45,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706525282] [2021-08-06 15:29:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:45,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:45,803 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 15:29:45,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:45,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706525282] [2021-08-06 15:29:45,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706525282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:45,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910405044] [2021-08-06 15:29:45,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:29:45,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:45,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:45,804 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 15:29:45,805 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 15:29:50,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:29:50,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:50,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:29:50,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:29:51,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:29:51,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:29:51,518 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 110 treesize of output 96 [2021-08-06 15:29:52,287 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 15:29:52,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910405044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:52,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:52,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-06 15:29:52,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824609253] [2021-08-06 15:29:52,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:29:52,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:52,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:29:52,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:29:52,288 INFO L87 Difference]: Start difference. First operand 1942 states and 6630 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 15:29:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:58,046 INFO L93 Difference]: Finished difference Result 3668 states and 11732 transitions. [2021-08-06 15:29:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-06 15:29:58,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 26 [2021-08-06 15:29:58,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:58,053 INFO L225 Difference]: With dead ends: 3668 [2021-08-06 15:29:58,053 INFO L226 Difference]: Without dead ends: 3611 [2021-08-06 15:29:58,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2114 ImplicationChecksByTransitivity, 5227.1ms TimeCoverageRelationStatistics Valid=1179, Invalid=4983, Unknown=0, NotChecked=0, Total=6162 [2021-08-06 15:29:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-08-06 15:29:58,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 1980. [2021-08-06 15:29:58,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.413845376452754) internal successors, (6756), 1979 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6756 transitions. [2021-08-06 15:29:58,099 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6756 transitions. Word has length 26 [2021-08-06 15:29:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:58,099 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 6756 transitions. [2021-08-06 15:29:58,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 15:29:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6756 transitions. [2021-08-06 15:29:58,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:29:58,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:58,103 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] [2021-08-06 15:29:58,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:58,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:58,329 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:58,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:58,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1765328514, now seen corresponding path program 55 times [2021-08-06 15:29:58,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:58,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768715208] [2021-08-06 15:29:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:58,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:59,206 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 15:29:59,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:59,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768715208] [2021-08-06 15:29:59,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768715208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:59,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201387816] [2021-08-06 15:29:59,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:29:59,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:59,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:59,207 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 15:29:59,209 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 15:30:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:04,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:30:04,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:05,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:30:05,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:30:05,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:30:05,102 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 116 treesize of output 96 [2021-08-06 15:30:06,227 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 15:30:06,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201387816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:06,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:06,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:30:06,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305610406] [2021-08-06 15:30:06,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:30:06,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:06,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:30:06,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:30:06,228 INFO L87 Difference]: Start difference. First operand 1980 states and 6756 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:30:10,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:10,008 INFO L93 Difference]: Finished difference Result 3503 states and 11289 transitions. [2021-08-06 15:30:10,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 15:30:10,008 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 15:30:10,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:10,016 INFO L225 Difference]: With dead ends: 3503 [2021-08-06 15:30:10,016 INFO L226 Difference]: Without dead ends: 3469 [2021-08-06 15:30:10,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 3484.7ms TimeCoverageRelationStatistics Valid=768, Invalid=2424, Unknown=0, NotChecked=0, Total=3192 [2021-08-06 15:30:10,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-08-06 15:30:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 1989. [2021-08-06 15:30:10,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 3.42102615694165) internal successors, (6801), 1988 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:10,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 6801 transitions. [2021-08-06 15:30:10,056 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 6801 transitions. Word has length 26 [2021-08-06 15:30:10,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:10,056 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 6801 transitions. [2021-08-06 15:30:10,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:30:10,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 6801 transitions. [2021-08-06 15:30:10,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:10,060 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:10,060 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] [2021-08-06 15:30:10,093 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 15:30:10,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:10,260 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1974199866, now seen corresponding path program 33 times [2021-08-06 15:30:10,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:10,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111388694] [2021-08-06 15:30:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:10,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:10,781 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 15:30:10,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:10,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111388694] [2021-08-06 15:30:10,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111388694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:10,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736081117] [2021-08-06 15:30:10,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:30:10,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:10,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:10,785 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 15:30:10,788 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 15:30:15,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:30:15,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:15,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:30:15,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:17,190 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:30:17,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 100 [2021-08-06 15:30:19,378 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 15:30:19,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736081117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:19,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:19,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-06 15:30:19,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276364247] [2021-08-06 15:30:19,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:30:19,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:19,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:30:19,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:30:19,379 INFO L87 Difference]: Start difference. First operand 1989 states and 6801 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:30:20,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:20,917 INFO L93 Difference]: Finished difference Result 2487 states and 8317 transitions. [2021-08-06 15:30:20,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:30:20,918 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 15:30:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:20,922 INFO L225 Difference]: With dead ends: 2487 [2021-08-06 15:30:20,922 INFO L226 Difference]: Without dead ends: 2472 [2021-08-06 15:30:20,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1535.8ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:30:20,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2021-08-06 15:30:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 1980. [2021-08-06 15:30:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.4183931278423447) internal successors, (6765), 1979 states have internal predecessors, (6765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6765 transitions. [2021-08-06 15:30:20,950 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6765 transitions. Word has length 26 [2021-08-06 15:30:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:20,950 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 6765 transitions. [2021-08-06 15:30:20,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:30:20,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6765 transitions. [2021-08-06 15:30:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:20,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:20,953 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] [2021-08-06 15:30:20,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:21,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:21,153 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:21,154 INFO L82 PathProgramCache]: Analyzing trace with hash 622396936, now seen corresponding path program 34 times [2021-08-06 15:30:21,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:21,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462800557] [2021-08-06 15:30:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:21,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:21,561 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 15:30:21,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:21,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462800557] [2021-08-06 15:30:21,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462800557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:21,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588230794] [2021-08-06 15:30:21,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:30:21,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:21,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:21,562 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 15:30:21,562 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 15:30:26,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:30:26,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:26,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:30:26,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:27,927 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:30:27,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:30:28,393 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 15:30:28,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588230794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:28,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:28,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:30:28,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362038623] [2021-08-06 15:30:28,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:30:28,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:28,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:30:28,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:30:28,394 INFO L87 Difference]: Start difference. First operand 1980 states and 6765 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 15:30:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:29,887 INFO L93 Difference]: Finished difference Result 2953 states and 9723 transitions. [2021-08-06 15:30:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:30:29,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 26 [2021-08-06 15:30:29,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:29,896 INFO L225 Difference]: With dead ends: 2953 [2021-08-06 15:30:29,896 INFO L226 Difference]: Without dead ends: 2908 [2021-08-06 15:30:29,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1409.0ms TimeCoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:30:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-08-06 15:30:29,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2008. [2021-08-06 15:30:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.420029895366218) internal successors, (6864), 2007 states have internal predecessors, (6864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 6864 transitions. [2021-08-06 15:30:29,929 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 6864 transitions. Word has length 26 [2021-08-06 15:30:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:29,929 INFO L470 AbstractCegarLoop]: Abstraction has 2008 states and 6864 transitions. [2021-08-06 15:30:29,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 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 15:30:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 6864 transitions. [2021-08-06 15:30:29,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:29,932 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:29,932 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] [2021-08-06 15:30:29,965 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 15:30:30,132 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,SelfDestructingSolverStorable91 [2021-08-06 15:30:30,132 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:30,133 INFO L82 PathProgramCache]: Analyzing trace with hash -995135844, now seen corresponding path program 35 times [2021-08-06 15:30:30,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:30,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415434455] [2021-08-06 15:30:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:30,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:30,603 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 15:30:30,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:30,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415434455] [2021-08-06 15:30:30,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415434455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:30,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162567644] [2021-08-06 15:30:30,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:30:30,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:30,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:30,605 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 15:30:30,606 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 15:30:36,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:30:36,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:36,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:30:36,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:36,746 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:30:36,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 15:30:37,826 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 15:30:37,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162567644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:37,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:37,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:30:37,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312631295] [2021-08-06 15:30:37,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:30:37,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:37,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:30:37,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:30:37,827 INFO L87 Difference]: Start difference. First operand 2008 states and 6864 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:30:40,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:40,123 INFO L93 Difference]: Finished difference Result 3053 states and 10096 transitions. [2021-08-06 15:30:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:30:40,123 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 15:30:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:40,130 INFO L225 Difference]: With dead ends: 3053 [2021-08-06 15:30:40,130 INFO L226 Difference]: Without dead ends: 3023 [2021-08-06 15:30:40,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2001.4ms TimeCoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:30:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3023 states. [2021-08-06 15:30:40,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3023 to 1997. [2021-08-06 15:30:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1996 states have (on average 3.417835671342685) internal successors, (6822), 1996 states have internal predecessors, (6822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:40,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 6822 transitions. [2021-08-06 15:30:40,172 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 6822 transitions. Word has length 26 [2021-08-06 15:30:40,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:40,172 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 6822 transitions. [2021-08-06 15:30:40,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:30:40,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 6822 transitions. [2021-08-06 15:30:40,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:40,176 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:40,176 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] [2021-08-06 15:30:40,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 15:30:40,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:40,393 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:40,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:40,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1478016736, now seen corresponding path program 36 times [2021-08-06 15:30:40,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:40,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389791316] [2021-08-06 15:30:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:40,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:40,827 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 15:30:40,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:40,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389791316] [2021-08-06 15:30:40,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389791316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:40,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601986720] [2021-08-06 15:30:40,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:30:40,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:40,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:40,828 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 15:30:40,829 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 15:30:46,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:30:46,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:46,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:30:46,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:48,090 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:30:48,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 100 [2021-08-06 15:30:50,096 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 15:30:50,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601986720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:50,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:50,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:30:50,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023810309] [2021-08-06 15:30:50,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:30:50,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:50,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:30:50,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:30:50,097 INFO L87 Difference]: Start difference. First operand 1997 states and 6822 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:30:52,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:52,576 INFO L93 Difference]: Finished difference Result 2695 states and 8846 transitions. [2021-08-06 15:30:52,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 15:30:52,576 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 15:30:52,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:52,581 INFO L225 Difference]: With dead ends: 2695 [2021-08-06 15:30:52,582 INFO L226 Difference]: Without dead ends: 2655 [2021-08-06 15:30:52,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 2150.4ms TimeCoverageRelationStatistics Valid=300, Invalid=1680, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:30:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-08-06 15:30:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 1991. [2021-08-06 15:30:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.4175879396984925) internal successors, (6801), 1990 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:52,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 6801 transitions. [2021-08-06 15:30:52,621 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 6801 transitions. Word has length 26 [2021-08-06 15:30:52,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:52,621 INFO L470 AbstractCegarLoop]: Abstraction has 1991 states and 6801 transitions. [2021-08-06 15:30:52,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:30:52,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 6801 transitions. [2021-08-06 15:30:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:30:52,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:52,625 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] [2021-08-06 15:30:52,658 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 15:30:52,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:52,826 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:52,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:52,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1665793854, now seen corresponding path program 37 times [2021-08-06 15:30:52,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:52,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746515147] [2021-08-06 15:30:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:52,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:53,221 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 15:30:53,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:53,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746515147] [2021-08-06 15:30:53,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746515147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:53,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845570812] [2021-08-06 15:30:53,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:30:53,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:53,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:53,223 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 15:30:53,224 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 15:30:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:59,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:30:59,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:59,642 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:30:59,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 15:31:00,661 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 15:31:00,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845570812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:00,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:00,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 15:31:00,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001592128] [2021-08-06 15:31:00,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:31:00,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:00,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:31:00,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:31:00,662 INFO L87 Difference]: Start difference. First operand 1991 states and 6801 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:01,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:01,248 INFO L93 Difference]: Finished difference Result 2496 states and 8305 transitions. [2021-08-06 15:31:01,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:31:01,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-06 15:31:01,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:01,253 INFO L225 Difference]: With dead ends: 2496 [2021-08-06 15:31:01,253 INFO L226 Difference]: Without dead ends: 2471 [2021-08-06 15:31:01,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 719.0ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:31:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-08-06 15:31:01,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 1985. [2021-08-06 15:31:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 3.4128024193548385) internal successors, (6771), 1984 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 6771 transitions. [2021-08-06 15:31:01,284 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 6771 transitions. Word has length 26 [2021-08-06 15:31:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:01,284 INFO L470 AbstractCegarLoop]: Abstraction has 1985 states and 6771 transitions. [2021-08-06 15:31:01,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 6771 transitions. [2021-08-06 15:31:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:31:01,286 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:01,286 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] [2021-08-06 15:31:01,320 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 15:31:01,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:01,487 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:01,487 INFO L82 PathProgramCache]: Analyzing trace with hash 800240156, now seen corresponding path program 38 times [2021-08-06 15:31:01,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:01,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186994168] [2021-08-06 15:31:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:01,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:01,857 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 15:31:01,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:01,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186994168] [2021-08-06 15:31:01,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186994168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:01,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496687520] [2021-08-06 15:31:01,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:31:01,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:01,858 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 15:31:01,931 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 15:31:07,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:31:07,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:07,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:08,383 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:31:08,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:31:08,883 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 15:31:08,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496687520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:08,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:08,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-06 15:31:08,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711489145] [2021-08-06 15:31:08,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:31:08,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:08,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:31:08,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:31:08,885 INFO L87 Difference]: Start difference. First operand 1985 states and 6771 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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 15:31:09,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:09,136 INFO L93 Difference]: Finished difference Result 2063 states and 6945 transitions. [2021-08-06 15:31:09,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:31:09,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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 26 [2021-08-06 15:31:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:09,140 INFO L225 Difference]: With dead ends: 2063 [2021-08-06 15:31:09,140 INFO L226 Difference]: Without dead ends: 2044 [2021-08-06 15:31:09,141 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 360.0ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:31:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2021-08-06 15:31:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1977. [2021-08-06 15:31:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 3.4114372469635628) internal successors, (6741), 1976 states have internal predecessors, (6741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 6741 transitions. [2021-08-06 15:31:09,192 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 6741 transitions. Word has length 26 [2021-08-06 15:31:09,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:09,192 INFO L470 AbstractCegarLoop]: Abstraction has 1977 states and 6741 transitions. [2021-08-06 15:31:09,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 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 15:31:09,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 6741 transitions. [2021-08-06 15:31:09,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:31:09,195 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:09,195 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] [2021-08-06 15:31:09,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-06 15:31:09,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:09,396 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:09,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1347052380, now seen corresponding path program 39 times [2021-08-06 15:31:09,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:09,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419050329] [2021-08-06 15:31:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:09,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:09,789 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 15:31:09,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:09,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419050329] [2021-08-06 15:31:09,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419050329] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:09,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990191223] [2021-08-06 15:31:09,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:31:09,790 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:09,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:09,791 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 15:31:09,791 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 15:31:15,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:31:15,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:15,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:15,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:16,280 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:31:16,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 91 [2021-08-06 15:31:18,169 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 15:31:18,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990191223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:18,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:18,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-06 15:31:18,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942824759] [2021-08-06 15:31:18,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:31:18,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:18,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:31:18,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:31:18,170 INFO L87 Difference]: Start difference. First operand 1977 states and 6741 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:31:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:18,967 INFO L93 Difference]: Finished difference Result 2213 states and 7424 transitions. [2021-08-06 15:31:18,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:31:18,968 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 15:31:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:18,971 INFO L225 Difference]: With dead ends: 2213 [2021-08-06 15:31:18,972 INFO L226 Difference]: Without dead ends: 2188 [2021-08-06 15:31:18,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 891.3ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:31:18,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-08-06 15:31:18,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1953. [2021-08-06 15:31:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 3.4149590163934427) internal successors, (6666), 1952 states have internal predecessors, (6666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:18,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 6666 transitions. [2021-08-06 15:31:18,998 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 6666 transitions. Word has length 26 [2021-08-06 15:31:18,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:18,998 INFO L470 AbstractCegarLoop]: Abstraction has 1953 states and 6666 transitions. [2021-08-06 15:31:18,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:31:18,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 6666 transitions. [2021-08-06 15:31:19,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:31:19,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:19,000 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] [2021-08-06 15:31:19,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-06 15:31:19,201 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,SelfDestructingSolverStorable96 [2021-08-06 15:31:19,201 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:19,201 INFO L82 PathProgramCache]: Analyzing trace with hash 796347224, now seen corresponding path program 40 times [2021-08-06 15:31:19,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:19,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006197404] [2021-08-06 15:31:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:19,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:19,590 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 15:31:19,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:19,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006197404] [2021-08-06 15:31:19,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006197404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:19,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899197858] [2021-08-06 15:31:19,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:31:19,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:19,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:19,591 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 15:31:19,591 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 15:31:25,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:31:25,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:25,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:31:25,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:26,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:31:26,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:31:26,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:31:26,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 100 [2021-08-06 15:31:27,288 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 15:31:27,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899197858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:27,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:27,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:31:27,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18271727] [2021-08-06 15:31:27,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:31:27,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:27,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:31:27,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:31:27,289 INFO L87 Difference]: Start difference. First operand 1953 states and 6666 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:31:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:28,968 INFO L93 Difference]: Finished difference Result 2805 states and 9326 transitions. [2021-08-06 15:31:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:31:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 15:31:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:28,973 INFO L225 Difference]: With dead ends: 2805 [2021-08-06 15:31:28,973 INFO L226 Difference]: Without dead ends: 2786 [2021-08-06 15:31:28,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1680.9ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:31:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-08-06 15:31:28,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1937. [2021-08-06 15:31:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.414772727272727) internal successors, (6611), 1936 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6611 transitions. [2021-08-06 15:31:29,005 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6611 transitions. Word has length 26 [2021-08-06 15:31:29,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:29,005 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 6611 transitions. [2021-08-06 15:31:29,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:31:29,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6611 transitions. [2021-08-06 15:31:29,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:31:29,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:29,008 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] [2021-08-06 15:31:29,044 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 15:31:29,216 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,SelfDestructingSolverStorable97 [2021-08-06 15:31:29,217 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:29,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1836189860, now seen corresponding path program 41 times [2021-08-06 15:31:29,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:29,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692759002] [2021-08-06 15:31:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:29,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:29,592 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 15:31:29,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:29,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692759002] [2021-08-06 15:31:29,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692759002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:29,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842192019] [2021-08-06 15:31:29,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:31:29,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:29,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:29,605 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 15:31:29,620 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 15:31:35,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:31:35,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:35,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:35,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:36,719 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:31:36,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:31:37,093 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 15:31:37,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842192019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:37,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:37,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:31:37,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362086054] [2021-08-06 15:31:37,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:31:37,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:37,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:31:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:31:37,094 INFO L87 Difference]: Start difference. First operand 1937 states and 6611 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:31:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:37,832 INFO L93 Difference]: Finished difference Result 2479 states and 8292 transitions. [2021-08-06 15:31:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:31:37,832 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 15:31:37,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:37,836 INFO L225 Difference]: With dead ends: 2479 [2021-08-06 15:31:37,837 INFO L226 Difference]: Without dead ends: 2464 [2021-08-06 15:31:37,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 872.2ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:31:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2021-08-06 15:31:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 1982. [2021-08-06 15:31:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.409893992932862) internal successors, (6755), 1981 states have internal predecessors, (6755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 6755 transitions. [2021-08-06 15:31:37,864 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 6755 transitions. Word has length 26 [2021-08-06 15:31:37,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:37,864 INFO L470 AbstractCegarLoop]: Abstraction has 1982 states and 6755 transitions. [2021-08-06 15:31:37,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:31:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 6755 transitions. [2021-08-06 15:31:37,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:31:37,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:37,867 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] [2021-08-06 15:31:37,901 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 15:31:38,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:38,067 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:38,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:38,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2003998952, now seen corresponding path program 42 times [2021-08-06 15:31:38,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:38,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135799357] [2021-08-06 15:31:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:38,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:38,475 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 15:31:38,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:38,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135799357] [2021-08-06 15:31:38,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135799357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:38,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949031004] [2021-08-06 15:31:38,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:31:38,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:38,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:38,476 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 15:31:38,477 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 15:31:44,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:31:44,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:44,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:44,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:45,673 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:31:45,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 100 [2021-08-06 15:31:48,800 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 15:31:48,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949031004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:48,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:48,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 15:31:48,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406350981] [2021-08-06 15:31:48,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:31:48,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:31:48,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:31:48,801 INFO L87 Difference]: Start difference. First operand 1982 states and 6755 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:31:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:51,006 INFO L93 Difference]: Finished difference Result 2838 states and 9371 transitions. [2021-08-06 15:31:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:31:51,006 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 15:31:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:51,011 INFO L225 Difference]: With dead ends: 2838 [2021-08-06 15:31:51,012 INFO L226 Difference]: Without dead ends: 2808 [2021-08-06 15:31:51,012 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2110.3ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:31:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-08-06 15:31:51,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 1983. [2021-08-06 15:31:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.4112008072653883) internal successors, (6761), 1982 states have internal predecessors, (6761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 6761 transitions. [2021-08-06 15:31:51,045 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 6761 transitions. Word has length 26 [2021-08-06 15:31:51,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:51,045 INFO L470 AbstractCegarLoop]: Abstraction has 1983 states and 6761 transitions. [2021-08-06 15:31:51,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 15:31:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 6761 transitions. [2021-08-06 15:31:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:31:51,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:51,048 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] [2021-08-06 15:31:51,083 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 15:31:51,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:51,248 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:51,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:51,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1705225504, now seen corresponding path program 43 times [2021-08-06 15:31:51,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:51,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648739802] [2021-08-06 15:31:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:51,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:51,631 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 15:31:51,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:51,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648739802] [2021-08-06 15:31:51,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648739802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:51,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089175469] [2021-08-06 15:31:51,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:31:51,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:51,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:51,632 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 15:31:51,633 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 15:31:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:57,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:31:57,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:58,647 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:31:58,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 70 [2021-08-06 15:31:59,185 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 15:31:59,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089175469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:59,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:59,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:31:59,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218384133] [2021-08-06 15:31:59,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:31:59,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:59,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:31:59,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:31:59,186 INFO L87 Difference]: Start difference. First operand 1983 states and 6761 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:31:59,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:59,878 INFO L93 Difference]: Finished difference Result 2585 states and 8607 transitions. [2021-08-06 15:31:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:31:59,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 15:31:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:59,883 INFO L225 Difference]: With dead ends: 2585 [2021-08-06 15:31:59,883 INFO L226 Difference]: Without dead ends: 2555 [2021-08-06 15:31:59,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 780.5ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:31:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-08-06 15:31:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1986. [2021-08-06 15:31:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1985 states have (on average 3.4141057934508816) internal successors, (6777), 1985 states have internal predecessors, (6777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 6777 transitions. [2021-08-06 15:31:59,912 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 6777 transitions. Word has length 26 [2021-08-06 15:31:59,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:59,913 INFO L470 AbstractCegarLoop]: Abstraction has 1986 states and 6777 transitions. [2021-08-06 15:31:59,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:31:59,913 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 6777 transitions. [2021-08-06 15:31:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:31:59,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:59,915 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] [2021-08-06 15:31:59,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-06 15:32:00,116 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,SelfDestructingSolverStorable100 [2021-08-06 15:32:00,116 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:00,116 INFO L82 PathProgramCache]: Analyzing trace with hash 639330528, now seen corresponding path program 44 times [2021-08-06 15:32:00,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:00,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73566660] [2021-08-06 15:32:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:00,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:00,463 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 15:32:00,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:00,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73566660] [2021-08-06 15:32:00,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73566660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:00,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824925043] [2021-08-06 15:32:00,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:32:00,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:00,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:00,464 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 15:32:00,465 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 15:32:06,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:32:06,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:06,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:32:06,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:07,527 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:32:07,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 94 [2021-08-06 15:32:09,410 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 15:32:09,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824925043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:09,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:09,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 15:32:09,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523569288] [2021-08-06 15:32:09,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:32:09,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:09,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:32:09,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:32:09,411 INFO L87 Difference]: Start difference. First operand 1986 states and 6777 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 15:32:10,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:10,012 INFO L93 Difference]: Finished difference Result 2549 states and 8549 transitions. [2021-08-06 15:32:10,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:32:10,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 26 [2021-08-06 15:32:10,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:10,016 INFO L225 Difference]: With dead ends: 2549 [2021-08-06 15:32:10,016 INFO L226 Difference]: Without dead ends: 2534 [2021-08-06 15:32:10,017 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 710.7ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:32:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-08-06 15:32:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2004. [2021-08-06 15:32:10,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.4103844233649525) internal successors, (6831), 2003 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:10,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6831 transitions. [2021-08-06 15:32:10,044 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6831 transitions. Word has length 26 [2021-08-06 15:32:10,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:10,044 INFO L470 AbstractCegarLoop]: Abstraction has 2004 states and 6831 transitions. [2021-08-06 15:32:10,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 15:32:10,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6831 transitions. [2021-08-06 15:32:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:10,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:10,047 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] [2021-08-06 15:32:10,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:10,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:10,247 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:10,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1438671812, now seen corresponding path program 45 times [2021-08-06 15:32:10,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:10,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495625356] [2021-08-06 15:32:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:10,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:10,693 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 15:32:10,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:10,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495625356] [2021-08-06 15:32:10,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495625356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:10,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233929106] [2021-08-06 15:32:10,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:32:10,693 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:10,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:10,694 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 15:32:10,695 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 15:32:17,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:32:17,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:17,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:32:17,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:19,923 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 15:32:19,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 82 [2021-08-06 15:32:20,413 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 15:32:20,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233929106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:20,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:20,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:32:20,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121442548] [2021-08-06 15:32:20,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:32:20,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:20,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:32:20,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:32:20,414 INFO L87 Difference]: Start difference. First operand 2004 states and 6831 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 15:32:21,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:21,064 INFO L93 Difference]: Finished difference Result 2495 states and 8370 transitions. [2021-08-06 15:32:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:32:21,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 26 [2021-08-06 15:32:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:21,069 INFO L225 Difference]: With dead ends: 2495 [2021-08-06 15:32:21,069 INFO L226 Difference]: Without dead ends: 2480 [2021-08-06 15:32:21,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 717.3ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:32:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-08-06 15:32:21,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2025. [2021-08-06 15:32:21,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 3.4071146245059287) internal successors, (6896), 2024 states have internal predecessors, (6896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 6896 transitions. [2021-08-06 15:32:21,099 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 6896 transitions. Word has length 26 [2021-08-06 15:32:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:21,100 INFO L470 AbstractCegarLoop]: Abstraction has 2025 states and 6896 transitions. [2021-08-06 15:32:21,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 15:32:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 6896 transitions. [2021-08-06 15:32:21,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:21,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:21,103 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] [2021-08-06 15:32:21,141 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 15:32:21,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 15:32:21,303 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:21,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:21,304 INFO L82 PathProgramCache]: Analyzing trace with hash -178860968, now seen corresponding path program 46 times [2021-08-06 15:32:21,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:21,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755419000] [2021-08-06 15:32:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:21,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:21,726 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 15:32:21,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:21,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755419000] [2021-08-06 15:32:21,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755419000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:21,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106711892] [2021-08-06 15:32:21,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:32:21,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:21,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:21,727 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 15:32:21,728 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 15:32:28,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:32:28,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:28,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:32:28,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:28,960 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:32:28,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 15:32:30,173 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 15:32:30,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106711892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:30,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:30,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:32:30,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801205512] [2021-08-06 15:32:30,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:32:30,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:30,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:32:30,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:32:30,174 INFO L87 Difference]: Start difference. First operand 2025 states and 6896 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 15:32:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:31,172 INFO L93 Difference]: Finished difference Result 2898 states and 9584 transitions. [2021-08-06 15:32:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:32:31,172 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 26 [2021-08-06 15:32:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:31,177 INFO L225 Difference]: With dead ends: 2898 [2021-08-06 15:32:31,177 INFO L226 Difference]: Without dead ends: 2868 [2021-08-06 15:32:31,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1066.4ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:32:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-08-06 15:32:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2035. [2021-08-06 15:32:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2035 states, 2034 states have (on average 3.411504424778761) internal successors, (6939), 2034 states have internal predecessors, (6939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2035 states to 2035 states and 6939 transitions. [2021-08-06 15:32:31,210 INFO L78 Accepts]: Start accepts. Automaton has 2035 states and 6939 transitions. Word has length 26 [2021-08-06 15:32:31,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:31,211 INFO L470 AbstractCegarLoop]: Abstraction has 2035 states and 6939 transitions. [2021-08-06 15:32:31,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 15:32:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2035 states and 6939 transitions. [2021-08-06 15:32:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:31,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:31,214 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] [2021-08-06 15:32:31,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 15:32:31,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 15:32:31,416 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:31,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:31,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1868803872, now seen corresponding path program 47 times [2021-08-06 15:32:31,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:31,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873432648] [2021-08-06 15:32:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:31,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:32,182 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 15:32:32,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:32,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873432648] [2021-08-06 15:32:32,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873432648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:32,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563153949] [2021-08-06 15:32:32,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:32:32,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:32,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:32,183 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 15:32:32,184 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 15:32:38,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:32:38,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:38,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:32:38,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:39,332 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 15:32:39,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 77 [2021-08-06 15:32:40,649 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 15:32:40,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563153949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:40,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:40,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 15:32:40,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914408796] [2021-08-06 15:32:40,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:32:40,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:40,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:32:40,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:32:40,650 INFO L87 Difference]: Start difference. First operand 2035 states and 6939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:32:41,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:41,350 INFO L93 Difference]: Finished difference Result 2645 states and 8842 transitions. [2021-08-06 15:32:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:32:41,351 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 15:32:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:41,355 INFO L225 Difference]: With dead ends: 2645 [2021-08-06 15:32:41,355 INFO L226 Difference]: Without dead ends: 2620 [2021-08-06 15:32:41,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 915.9ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:32:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2021-08-06 15:32:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 2039. [2021-08-06 15:32:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 3.4116781157998037) internal successors, (6953), 2038 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:41,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 6953 transitions. [2021-08-06 15:32:41,384 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 6953 transitions. Word has length 26 [2021-08-06 15:32:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:41,384 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 6953 transitions. [2021-08-06 15:32:41,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:32:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 6953 transitions. [2021-08-06 15:32:41,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:41,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:41,387 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] [2021-08-06 15:32:41,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 15:32:41,587 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,SelfDestructingSolverStorable104 [2021-08-06 15:32:41,587 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:41,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:41,588 INFO L82 PathProgramCache]: Analyzing trace with hash 615736860, now seen corresponding path program 48 times [2021-08-06 15:32:41,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:41,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417185548] [2021-08-06 15:32:41,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:41,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:41,989 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 15:32:41,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:41,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417185548] [2021-08-06 15:32:41,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417185548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:41,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424444671] [2021-08-06 15:32:41,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:32:41,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:41,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:41,990 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 15:32:41,991 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 15:32:48,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:32:48,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:48,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:32:48,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:49,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:32:49,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:32:49,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2021-08-06 15:32:50,507 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 15:32:50,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424444671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:50,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:50,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 15:32:50,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292816322] [2021-08-06 15:32:50,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:32:50,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:50,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:32:50,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:32:50,508 INFO L87 Difference]: Start difference. First operand 2039 states and 6953 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:32:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:51,265 INFO L93 Difference]: Finished difference Result 2584 states and 8673 transitions. [2021-08-06 15:32:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:32:51,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 15:32:51,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:51,270 INFO L225 Difference]: With dead ends: 2584 [2021-08-06 15:32:51,270 INFO L226 Difference]: Without dead ends: 2569 [2021-08-06 15:32:51,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 836.1ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:32:51,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-08-06 15:32:51,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2039. [2021-08-06 15:32:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 3.4116781157998037) internal successors, (6953), 2038 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 6953 transitions. [2021-08-06 15:32:51,298 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 6953 transitions. Word has length 26 [2021-08-06 15:32:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:51,298 INFO L470 AbstractCegarLoop]: Abstraction has 2039 states and 6953 transitions. [2021-08-06 15:32:51,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 15:32:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 6953 transitions. [2021-08-06 15:32:51,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:32:51,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:51,302 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:51,343 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 15:32:51,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:51,502 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:51,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:51,502 INFO L82 PathProgramCache]: Analyzing trace with hash 281045340, now seen corresponding path program 56 times [2021-08-06 15:32:51,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:51,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905620267] [2021-08-06 15:32:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:51,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:51,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:51,995 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 15:32:51,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:51,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905620267] [2021-08-06 15:32:51,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905620267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:51,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854416909] [2021-08-06 15:32:51,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:32:51,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:51,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:51,996 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 15:32:51,997 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 15:32:58,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:32:58,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:58,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:32:58,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:59,709 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:32:59,710 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 116 treesize of output 82 [2021-08-06 15:32:59,853 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 15:32:59,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854416909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:59,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:59,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:32:59,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754235057] [2021-08-06 15:32:59,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:32:59,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:59,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:32:59,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:32:59,854 INFO L87 Difference]: Start difference. First operand 2039 states and 6953 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 15:33:00,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:00,558 INFO L93 Difference]: Finished difference Result 2576 states and 8339 transitions. [2021-08-06 15:33:00,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:33:00,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 26 [2021-08-06 15:33:00,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:00,563 INFO L225 Difference]: With dead ends: 2576 [2021-08-06 15:33:00,563 INFO L226 Difference]: Without dead ends: 2539 [2021-08-06 15:33:00,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 728.4ms TimeCoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:33:00,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2021-08-06 15:33:00,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 2061. [2021-08-06 15:33:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.4106796116504854) internal successors, (7026), 2060 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:00,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7026 transitions. [2021-08-06 15:33:00,594 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7026 transitions. Word has length 26 [2021-08-06 15:33:00,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:00,594 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 7026 transitions. [2021-08-06 15:33:00,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 15:33:00,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7026 transitions. [2021-08-06 15:33:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:33:00,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:00,597 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] [2021-08-06 15:33:00,636 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 15:33:00,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:00,798 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:00,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:00,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1348919904, now seen corresponding path program 57 times [2021-08-06 15:33:00,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:00,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018479359] [2021-08-06 15:33:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:00,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:01,258 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 15:33:01,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:01,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018479359] [2021-08-06 15:33:01,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018479359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:01,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178134620] [2021-08-06 15:33:01,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:33:01,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:01,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:01,259 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 15:33:01,260 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 15:33:08,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:33:08,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:08,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:33:08,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:08,948 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 15:33:08,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 103 [2021-08-06 15:33:10,083 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 15:33:10,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178134620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:10,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:10,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:33:10,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527539488] [2021-08-06 15:33:10,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:33:10,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:10,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:33:10,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:33:10,084 INFO L87 Difference]: Start difference. First operand 2061 states and 7026 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 15:33:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:11,738 INFO L93 Difference]: Finished difference Result 2588 states and 8564 transitions. [2021-08-06 15:33:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:33:11,738 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 26 [2021-08-06 15:33:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:11,743 INFO L225 Difference]: With dead ends: 2588 [2021-08-06 15:33:11,743 INFO L226 Difference]: Without dead ends: 2527 [2021-08-06 15:33:11,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1608.2ms TimeCoverageRelationStatistics Valid=339, Invalid=1221, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:33:11,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2021-08-06 15:33:11,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2059. [2021-08-06 15:33:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 3.4057337220602526) internal successors, (7009), 2058 states have internal predecessors, (7009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 7009 transitions. [2021-08-06 15:33:11,771 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 7009 transitions. Word has length 26 [2021-08-06 15:33:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:11,771 INFO L470 AbstractCegarLoop]: Abstraction has 2059 states and 7009 transitions. [2021-08-06 15:33:11,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 15:33:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 7009 transitions. [2021-08-06 15:33:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:33:11,774 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:11,774 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] [2021-08-06 15:33:11,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 15:33:11,974 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,SelfDestructingSolverStorable107 [2021-08-06 15:33:11,975 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:11,975 INFO L82 PathProgramCache]: Analyzing trace with hash -308346528, now seen corresponding path program 58 times [2021-08-06 15:33:11,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:11,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126889602] [2021-08-06 15:33:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:11,975 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:12,493 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 15:33:12,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:12,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126889602] [2021-08-06 15:33:12,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126889602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:12,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737569545] [2021-08-06 15:33:12,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:33:12,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:12,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:12,495 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 15:33:12,496 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 15:33:19,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:33:19,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:19,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:33:19,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:20,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 15:33:20,316 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-06 15:33:20,316 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 126 treesize of output 82 [2021-08-06 15:33:20,538 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 15:33:20,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737569545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:20,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:20,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-08-06 15:33:20,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971881379] [2021-08-06 15:33:20,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:33:20,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:20,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:33:20,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:33:20,539 INFO L87 Difference]: Start difference. First operand 2059 states and 7009 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 15:33:21,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:21,080 INFO L93 Difference]: Finished difference Result 2501 states and 8369 transitions. [2021-08-06 15:33:21,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:33:21,081 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 26 [2021-08-06 15:33:21,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:21,085 INFO L225 Difference]: With dead ends: 2501 [2021-08-06 15:33:21,085 INFO L226 Difference]: Without dead ends: 2486 [2021-08-06 15:33:21,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 634.9ms TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:33:21,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-08-06 15:33:21,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2069. [2021-08-06 15:33:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 3.40715667311412) internal successors, (7046), 2068 states have internal predecessors, (7046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:21,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 7046 transitions. [2021-08-06 15:33:21,114 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 7046 transitions. Word has length 26 [2021-08-06 15:33:21,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:21,115 INFO L470 AbstractCegarLoop]: Abstraction has 2069 states and 7046 transitions. [2021-08-06 15:33:21,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 15:33:21,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 7046 transitions. [2021-08-06 15:33:21,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:33:21,117 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:21,117 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] [2021-08-06 15:33:21,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:21,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:21,318 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:21,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:21,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1961622048, now seen corresponding path program 49 times [2021-08-06 15:33:21,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:21,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135660307] [2021-08-06 15:33:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:21,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:21,942 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 15:33:21,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:21,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135660307] [2021-08-06 15:33:21,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135660307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:21,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958046850] [2021-08-06 15:33:21,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:33:21,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:21,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:21,943 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 15:33:21,944 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 15:33:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:29,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:33:29,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:30,006 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 15:33:30,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 15:33:30,495 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 15:33:30,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958046850] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:30,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:30,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:33:30,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506997792] [2021-08-06 15:33:30,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:33:30,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:30,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:33:30,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:33:30,496 INFO L87 Difference]: Start difference. First operand 2069 states and 7046 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:33:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:31,633 INFO L93 Difference]: Finished difference Result 2661 states and 8815 transitions. [2021-08-06 15:33:31,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:33:31,633 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 15:33:31,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:31,638 INFO L225 Difference]: With dead ends: 2661 [2021-08-06 15:33:31,638 INFO L226 Difference]: Without dead ends: 2646 [2021-08-06 15:33:31,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1200.4ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:33:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-08-06 15:33:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2077. [2021-08-06 15:33:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2077 states, 2076 states have (on average 3.4055876685934487) internal successors, (7070), 2076 states have internal predecessors, (7070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:31,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 7070 transitions. [2021-08-06 15:33:31,672 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 7070 transitions. Word has length 26 [2021-08-06 15:33:31,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:31,672 INFO L470 AbstractCegarLoop]: Abstraction has 2077 states and 7070 transitions. [2021-08-06 15:33:31,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 15:33:31,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 7070 transitions. [2021-08-06 15:33:31,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:33:31,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:31,675 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] [2021-08-06 15:33:31,715 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 15:33:31,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:31,876 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:31,876 INFO L82 PathProgramCache]: Analyzing trace with hash -411240484, now seen corresponding path program 59 times [2021-08-06 15:33:31,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:31,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649113031] [2021-08-06 15:33:31,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:31,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:31,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:32,379 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 15:33:32,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:32,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649113031] [2021-08-06 15:33:32,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649113031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:32,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39598100] [2021-08-06 15:33:32,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:33:32,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:32,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:32,381 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 15:33:32,381 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 15:33:39,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:33:39,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:39,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:33:39,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:40,679 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 15:33:40,680 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 116 treesize of output 82 [2021-08-06 15:33:40,882 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 15:33:40,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39598100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:40,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:40,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 15:33:40,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685398811] [2021-08-06 15:33:40,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:33:40,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:40,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:33:40,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:33:40,883 INFO L87 Difference]: Start difference. First operand 2077 states and 7070 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:33:42,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:42,552 INFO L93 Difference]: Finished difference Result 3277 states and 10409 transitions. [2021-08-06 15:33:42,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:33:42,552 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 15:33:42,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:42,558 INFO L225 Difference]: With dead ends: 3277 [2021-08-06 15:33:42,558 INFO L226 Difference]: Without dead ends: 3247 [2021-08-06 15:33:42,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1539.1ms TimeCoverageRelationStatistics Valid=298, Invalid=1342, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:33:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-08-06 15:33:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2115. [2021-08-06 15:33:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2114 states have (on average 3.411542100283822) internal successors, (7212), 2114 states have internal predecessors, (7212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:42,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 7212 transitions. [2021-08-06 15:33:42,593 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 7212 transitions. Word has length 26 [2021-08-06 15:33:42,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:42,593 INFO L470 AbstractCegarLoop]: Abstraction has 2115 states and 7212 transitions. [2021-08-06 15:33:42,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 15:33:42,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 7212 transitions. [2021-08-06 15:33:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:33:42,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:42,596 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] [2021-08-06 15:33:42,637 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 15:33:42,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:42,797 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:42,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:42,797 INFO L82 PathProgramCache]: Analyzing trace with hash -371751672, now seen corresponding path program 50 times [2021-08-06 15:33:42,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:42,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766625719] [2021-08-06 15:33:42,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:42,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:43,521 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 15:33:43,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:43,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766625719] [2021-08-06 15:33:43,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766625719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:43,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404787763] [2021-08-06 15:33:43,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:33:43,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:43,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:43,522 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 15:33:43,523 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 15:33:50,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:33:50,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:33:50,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:33:50,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:33:51,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 15:33:51,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 96 [2021-08-06 15:33:53,896 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 15:33:53,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404787763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:53,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:33:53,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-06 15:33:53,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440346141] [2021-08-06 15:33:53,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:33:53,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:33:53,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:33:53,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:33:53,897 INFO L87 Difference]: Start difference. First operand 2115 states and 7212 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 15:33:57,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:33:57,142 INFO L93 Difference]: Finished difference Result 3084 states and 10019 transitions. [2021-08-06 15:33:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:33:57,142 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 26 [2021-08-06 15:33:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:33:57,148 INFO L225 Difference]: With dead ends: 3084 [2021-08-06 15:33:57,148 INFO L226 Difference]: Without dead ends: 3039 [2021-08-06 15:33:57,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 2908.0ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:33:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3039 states. [2021-08-06 15:33:57,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3039 to 2153. [2021-08-06 15:33:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 3.41728624535316) internal successors, (7354), 2152 states have internal predecessors, (7354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:33:57,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 7354 transitions. [2021-08-06 15:33:57,184 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 7354 transitions. Word has length 26 [2021-08-06 15:33:57,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:33:57,184 INFO L470 AbstractCegarLoop]: Abstraction has 2153 states and 7354 transitions. [2021-08-06 15:33:57,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 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 15:33:57,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 7354 transitions. [2021-08-06 15:33:57,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 15:33:57,187 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:33:57,187 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] [2021-08-06 15:33:57,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 15:33:57,387 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,SelfDestructingSolverStorable111 [2021-08-06 15:33:57,388 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:33:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:33:57,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1989284452, now seen corresponding path program 51 times [2021-08-06 15:33:57,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:33:57,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241624755] [2021-08-06 15:33:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:33:57,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:33:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:33:57,952 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 15:33:57,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:33:57,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241624755] [2021-08-06 15:33:57,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241624755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:33:57,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174552402] [2021-08-06 15:33:57,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:33:57,953 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:33:57,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:33:57,961 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 15:33:57,962 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 15:34:05,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:34:05,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:34:05,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 15:34:05,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-08-06 15:34:06,042 WARN L223 SmtUtils]: Removed 3 from assertion stack [2021-08-06 15:34:06,043 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:34:06,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-06 15:34:06,091 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 15:34:06,091 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:34:06,244 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,SelfDestructingSolverStorable112 [2021-08-06 15:34:06,244 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 7ms.. [2021-08-06 15:34:06,246 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:34:06,246 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:34:06,246 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 15:34:06,249 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:34:06,249 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:34:06,251 INFO L202 PluginConnector]: Adding new model min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:34:06 BasicIcfg [2021-08-06 15:34:06,251 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:34:06,251 INFO L168 Benchmark]: Toolchain (without parser) took 683690.59 ms. Allocated memory was 191.9 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 172.3 MB in the beginning and 776.8 MB in the end (delta: -604.5 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-06 15:34:06,251 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 191.9 MB. Free memory was 173.4 MB in the beginning and 173.3 MB in the end (delta: 84.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:34:06,251 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.43 ms. Allocated memory is still 191.9 MB. Free memory was 172.2 MB in the beginning and 170.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 15:34:06,251 INFO L168 Benchmark]: Boogie Preprocessor took 20.00 ms. Allocated memory is still 191.9 MB. Free memory was 170.6 MB in the beginning and 169.7 MB in the end (delta: 937.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:34:06,252 INFO L168 Benchmark]: RCFGBuilder took 255.43 ms. Allocated memory is still 191.9 MB. Free memory was 169.5 MB in the beginning and 156.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-06 15:34:06,252 INFO L168 Benchmark]: TraceAbstraction took 683384.23 ms. Allocated memory was 191.9 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 156.0 MB in the beginning and 776.8 MB in the end (delta: -620.7 MB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-06 15:34:06,252 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 0.12 ms. Allocated memory is still 191.9 MB. Free memory was 173.4 MB in the beginning and 173.3 MB in the end (delta: 84.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.43 ms. Allocated memory is still 191.9 MB. Free memory was 172.2 MB in the beginning and 170.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.00 ms. Allocated memory is still 191.9 MB. Free memory was 170.6 MB in the beginning and 169.7 MB in the end (delta: 937.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 255.43 ms. Allocated memory is still 191.9 MB. Free memory was 169.5 MB in the beginning and 156.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 683384.23 ms. Allocated memory was 191.9 MB in the beginning and 1.9 GB in the end (delta: 1.7 GB). Free memory was 156.0 MB in the beginning and 776.8 MB in the end (delta: -620.7 MB). Peak memory consumption was 1.1 GB. 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: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 7ms.. - TimeoutResultAtElement [Line: 59]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 7ms.. - TimeoutResultAtElement [Line: 59]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 7ms.. - TimeoutResultAtElement [Line: 60]: 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 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 7ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 683247.2ms, OverallIterations: 113, TraceHistogramMax: 2, EmptinessCheckTime: 277.4ms, AutomataDifference: 157534.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 50.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4675 SDtfs, 21880 SDslu, 34612 SDs, 0 SdLazy, 64555 SolverSat, 3779 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34556.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5915 GetRequests, 2052 SyntacticMatches, 100 SemanticMatches, 3763 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44730 ImplicationChecksByTransitivity, 146113.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2153occurred in iteration=112, InterpolantAutomatonStates: 2896, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2897.5ms AutomataMinimizationTime, 112 MinimizatonAttempts, 81753 StatesRemovedByMinimization, 112 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 342.8ms SsaConstructionTime, 1988.1ms SatisfiabilityAnalysisTime, 194664.8ms InterpolantComputationTime, 5558 NumberOfCodeBlocks, 5558 NumberOfCodeBlocksAsserted, 352 NumberOfCheckSat, 5337 ConstructedInterpolants, 107 QuantifiedInterpolants, 153388 SizeOfPredicates, 650 NumberOfNonLiveVariables, 7202 ConjunctsInSsa, 2278 ConjunctsInUnsatCore, 221 InterpolantComputations, 3 PerfectInterpolantSequences, 107/1294 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